No "Faster Than Light" Neutrinos

SCIENCE AS A PROCESS

Most people see science as purporting itself to be infallible and they can twist this perception for many reasons (e.g. "See, they didn't see what they thought they saw so science cannot be trusted.").  The truth is that science is a process.  It must be reproducible by others.  Sometimes, an experiment comes around that seems to defy the current understanding of science and people are quick to jump and accuse science of being unreliable.  Really, when results like this come to light, it is the duty of other scientists to scrutinize the results: to try to reproduce them and, if they cannot, try to find where the errors in the original experiment occurred.  Most of the time, radical findings are disproved.  When they are not, this is an exciting time for science to learn more about the world around us!  We scientists often spend as much time trying to disprove things as we spend trying to prove them.  Truly revolutionary results often exploit a subtlety in a theory (which in science means a highly tested and verified description of how something works and NOT a hypothesis or guess as it is sometimes used in everyday language) or law that opens the way to a deeper understanding.  Science is not created or invented by scientists - the Universe has its properties and we simply pursue the discovery of them so we can understand better how it works.

THE "FASTER THAN LIGHT" NEUTRINOS

While at the APS April Meeting this past week, there was a lot of excitement (see the talk abstracts in this session) about the "faster than the speed of light" neutrinos that the OPERA collaboration claimed to have observed.  There was extra excitement since there was a final resolution at the beginning of the meeting along with a little drama.  There were even talks on how to use this new coverage as a great outreach opportunity to illustrate science as a process (don't think of the scientific method that you were taught in school - science almost never follows that prescription but it is a good starting point).  I've had many people bring this up to me when I talk about how gravitational waves are expected to travel at the speed of light but could travel slower - never faster.  Then there is usually someone who asks about the new neutrino results and this is when I get to talk about how science is a process.  So, I've decided that I would dedicate today's blog post to the subject matter.  Spoiler alert: there are NO "faster than light" neutrinos!  If you are interested in a very good discussion of these results, disproof, and aftermath, read more about it here.

***  What is a neutrino?  ***

A neutrino is a virtually massless particle that interacts so weakly with matter that it can travel right through any matter with only a few (of billions and billions) interacting with matter.  The neutrino has never been directly detected but we know when one interacts with matter because it produces other subatomic particles or radiation.  Every second, about 10,000,000,000,000 (that's 10 trillion) neutrinos from our Sun pass through every square foot when the Sun is directly overhead.  Those neutrinos pass right through you and, since they so rarely interact with anything, you don't notice a thing. 

Because neutrinos are virtually massless (I say virtually because there is evidence they they do indeed have mass, but it is so small that it hasn't been accurately measured) they can travel at or so near the speed of light that we haven't measured evidence of them traveling slower.  This agrees with special relativity: only massless particles can travel the speed of light and massive particles can only travel slower (there are theoretical particles called tachyons that can only travel as slow as the speed of light and travel faster otherwise - these have never been observed).

***  What is the OPERA experiment?  ***

The OPERA experiment used a beam of neutrinos created at CERN on the Franco-Swiss border to send to the OPERA detector in Gran Sasso, Italy.  That's right, the beam of neutrinos was shot right through the intervening earth between these 2 sites.  Since the distance is known to high precision, the time it takes the neutrinos to arrive at OPERA is directly related to their speed.  It appeared that they were measuring their arrival about 60 nanoseconds (0.00000006 seconds) before they should have if they traveled at the speed of light. 

***  What did we know about the speed of neutrinos before OPERA?  ***

There have been many experiments that have observed neutrinos traveling at the speed of light.  These experiments have been both Earth-sourced (where we create and then detect the resulting neutrinos) and Universe-sourced.  A spectacular example of using neutrinos from space was the detection of neutrinos that preceded the supernova 1987a.  They arrived 3 hours before the light from the stellar explosion did.  This is what is expected because neutrinos are created when the matter in the star collapses before the supernova explosion.  If neutrinos traveled as fast as the OPERA collaboration claimed to have observed them traveling, then after traveling the more than 160,000 light years to Earth they would have arrived 4 years before the accompanying light we observed.

***  Should OPERA have published their result?  ***

So, was the OPERA collaboration wrong to publish their observations?  Absolutely not (in my opinion at least)!  Nowhere in their paper did they claim that they have found a fault with the current understanding of the physics - they simply couldn't disprove their own observations so they opened their experiment up to the scrutiny of the scientific community.  They even recognize the controversial results and their desire for scrutiny of their experiment in their paper (which can be read in full here):

"Despite the large significance of the measurement reported here and the stability of the analysis, the potentially great impact of the result motivates the continuation of our studies in order to investigate possible still unknown systematic effects that could explain the observed anomaly. We deliberately do not attempt any theoretical or phenomenological interpretation of the results. "

THE RESOLUTION TO THE CONTROVERSY AND THE FALLOUT

In the end, it was found that a loose fiber optic cable and an error in their timing produced the superluminal (fancy way of saying 'faster than the speed of light') observations.  THERE IS NO EVIDENCE TO SUPPORT THAT NEUTRINOS CAN TRAVEL FASTER THAN THE SPEED OF LIGHT.  Also, the ICARUS experiment (located in Gran Sasso with OPERA) independently reproduced the experiment and found no faster than light neutrinos.

The heads of the collaboration resigned their post on March 30 (just a few days ago) after a vote of no confidence.  There were scientists in the collaboration who felt the publication of the results was premature, and that not everything that was done was good experimental procedure.  It seems that the resignations were the result of their rush to publish the paper, more than what they published.

Crawfish Boils and On the Road Again...

Last week's post came to you from the LIGO-Virgo Meeting in Boston, MA.  This week, it is coming to you from Atlanta, GA.  I just arrived here for the APS April Meeting.  My room is a beautiful corner room with two great views!  So I've chosen the better view from one of my windows:

Actually, I am here a day early so that I can attend the Professional Skills Development Workshop which is designed to improve the communication and negotiation skills of women physicists.  I'm looking forward to this as, while I would love to improve my communication skills, I really feel that I need to develop negotiation skills.  I am currently working to transition my current postdoc position (which is temporary by definition) into a more permanent position, not only because I love my work and the opportunities I have here, but my husband also works at the LIGO Livingston Observatory as an engineer.  The fact that I am this early in my career and living under the same roof with my husband, who is also happily employed in his field, is almost unheard of.  This is known as the two-body problem - when two academic professionals are challenged to find a way to find jobs together; I plan to write a blog post on this later.  That being said, I almost want to jump and any offer that can be scrapped together for me - the last thing I want to do is ruin the good thing I have going.  This is exactly one of the reasons that women tend to make less than men, even in physics - we undersell ourselves.  While I have no intention of trying to wring every penny I can out of a new position, I want to make sure that I am at least being compensated properly for my work.

As for the APS April Meeting, I will be giving a talk on the latest burst gravitational wave all-sky search results.  The information for my talk is here and the "plain English" science summary of the paper is here.  Once I give my talk, the presentation will be publicly available on the LIGO Document Control Center (DCC).  I will also be attending the APS Forum on Education Executive Committee Meeting and this will be the last of my term.  I have more than enjoyed the others I was privileged to serve with and it has been wonderful to get a chance to spread my wings a little more in physics education.  Of course, I have days and days of interesting talks and other activities to look forward to.  I will make sure to Tweet points of interest so make sure to follow me @livingligo.  You can also follow others' Tweets from the meeting using the hashtag #APSapril.

Between my trips to Boston last week and this one to Atlanta, I did get to be home in Baton Rouge for a few days.  Yesterday, the observatory staff was updated on the large scale status of the Advanced LIGO upgrade by the program leader, David Shoemaker.  While that was very informative (all is going well), the best part of the day of the crawfish boil we had outside afterwards.  For those of you who don't live in the American South (specifically the deep south), crawfish/crawdads/mudbugs/crayfish (but don't call them the latter around the natives lest you truly out yourself as not one of them) are essentially small freshwater lobsters that yield about the same amount of meat in their tail as a shrimp.  The meal takes "family style" to a new level: everything is served in heaps and you get a tray instead of a plate and it is heaped with the crawfish, sausage, corn-on-the-cob, and potatoes.  Oh yeah, and you don't get utensils.  This is a get-your-hands-dirty kind of meal.  Here is what my lunch looked like (before I started tearing the little critters apart - the communal aftermath from everyone at the table wasn't nearly as pretty):

This is considered a "dainty" portion.  A few other tips on how to fit in as a local:

• Don't sit while you eat crawfish - you stand so that the juice that can sometimes explode out of the body when you separate the tail from the head doesn't get all over you.
• Suck the heads!  Once your remove the tail, don't through away the top part of the body - that's where all the best flavor is.  As I have never done this myself, I am not sure if they are referring to the seasoned boil that remains inside or if they actually suck the "stuff" out.  To me, it just looks like the poor thing is trying to escape!
• Again, don't call them crayfish.

And a point of common sense - take your watch off!  Mine still smells like crawfish!

Nerdy Fun for the Holidays!

Since I am not sure that I will be posting again before the end of the year (I hope so, but I also have the feeling that you will be busy with your own holiday events), I wanted to make this a fun post that will make you smile.


• Happy Helium Holidays

The APS Physics Buzz Blog team performed this wonderful rendition of Carol of the Bells using helium or sulfur hexafluoride to modify their voices and a harmonious, hilarious way!  Many people are familiar with the fact that if you inhale helium your voice becomes much higher pitched.  This is because the helium gas is so much lighter than air, it allows your vocal cords to vibrate at a higher frequency producing the high pitch.  Sulfur hexafluoride is sometimes known as the anti-helium since it is so much heavier than helium, if causes your vocal cords to vibrate much slower producing a deep, low pitch.

The beginning of this video features Becky Thompson-Flagg who is the Head of Public Outreach for the APS and is also the model for the Spectra superhero character comic books (read here about that).  She explains the physics behind the voice changes and the mild peril involved in this performance.  Then the concert begins :)

• Interactive Relativity Tutorial - Al's Relativistic Adventures

Al's Relativistic Adventures is an animated tutorial on special relativity.  While this is appropriate for middle school students, I found the lessons to be very accurate and the authors are talented at communicating complicated concepts in easy to understand ways (I even learned how to better communicate some concepts from working through this activity).  Once you are done, you are even awarded a certificate - I printed mine out and hung it in my office :)

• Play the GRB Lottery

Gamma ray bursts (GRBs) are the most luminous events to be observed in the Universe and their origins, other than that they are produce from extraordinary energetic events), are still not certain.  They play a vital role to LIGO since whatever produces them could have produced gravitational waves and observe these gravitational waves may uncover the cause of these explosions.

There are several satellites currently in orbit around the Earth detecting these GRBs.  One of these is the Swift satellite and they have a fun GRB Lottery to play on their website (free to play, of course).  You are presented a map of the sky that has locations of past detected GRBs (notice that there is no area on the sky that is favored over another so any guess is really as good as another).  You then click on an area that you would like to select as your own and if you are the closest guess to a GRB within the two weeks, you win!  "What do you win?" you say...  Well, you get a nifty certificate commemorating your good fortune and the Swift outreach staff will send you a small gift (I got a nice package of education materials including a poster).

I played the GRB Lottery once and I won!  I decided that I would retire from my glorious reign so that the rest of you can have a chance!  :P  Below is the certificate I earned which is hanging proudly in my office:

• Physics Carols

This webpage (www.PhysicsSongs.org) has an amazing collection of covers to well known songs with physics lyrics.  They even have a special page of physics related carols!  I have to admit to getting lost on the page and chuckling to myself (and feeling even more nerdy than usual)!

Bittersweet: The End of A Professional Service Term

I have mentioned many times on this blog that I feel that performing service to my profession is just as important as the research and public outreach that I do; in a way, this is a form of professional outreach.

I have had the uncommon honor to serve on the American Physical Society (APS) Council and then, half way into my four-year term, I was elected to serve on their Executive Board.  I have met many new colleagues whom I would have never met otherwise since we don't work in the same field of physics.  Even better, some of them have become friends (good enough friends that I will even discuss my Impostor Syndrome issue with them - I wrote a whole post about this).

As far as contributing to the profession, I have had the opportunity to work extensively on strategic planning for the next decade of the society and represented young physicists' concerns on many issues.  Even more than that, I am now able to better understand the workings of my professional society, understand the concerns of physicists who work in industry, outside of the United States, etc. and learn more about the politics (inside and outside of physics) that make research happen (or not).

My term comes to a close (on both the Council and the Executive Board) at the end of this year and I have just traveled back from my last meetings in Salt Lake City, UT.  I am sad about not getting to meet the new people who will be elected to replace all of us rotating off this year (I do recognize if we never left, there would be no new people!).  A big relief to me is that I won't have to travel so much - if you serve on the Council, that is 2 trips a year and then if you serve on the Executive Board that is an additional 3 trips (or 4 trips next year).  Since I HATE to travel, this will mean more nights in my own bed <contented sigh>.

The view from my hotel room in Salt Lake City.  This is facing Temple Square and the LDS temple is visible between the 2 red-orange buildings.

If you are reading this and are not a physicist (I hope some of you aren't since it is for you that I really write this blog), I hope that I have given you a little peek into the physics community outside of LIGO.  If you are a physicist, I urge you to consider expanding whatever service work you do to the APS, AAPT, OSA, etc.  It can be a lot of work, but I would definitely do it all over again.  Of course, service isn't all work (just mostly):

Wine tasting during the APS Executive Board Retreat, Santa Barbara, CA (Photo: Ken Cole)

Special thanks to Ken Cole for permission to use his picture of me (above).  Ken is the APS Special Assistant to the Executive Officer (and has done a great job a wrangling me these last years) and is also a gifted photographer.  You can view more of his photos here.

Slaying My Own Dragons

I haven't written in a while.  I've been working and traveling but that isn't why I haven't been writing.  I've stayed away because I have recently been dealing with my own personal demons (which surface for me at least on an annual basis)... 

When I first started this blog, I promised a look into my everyday life as a LIGO scientist.  Almost everything that I have shared has been positive and, truly, that is how the majority of my life passes - I am blessed beyond my dreams and I love my life and my work.  However, there are the other days where I feel like nothing I've done has amounted to anything other than keeping me busy.  Deep down, I know that isn't true but I have a horrible way of marginalizing everything I do.  Basically, if I did it then anyone could have or it wasn't meaningful.  This is a well known phenomenon called the Impostor Syndrome.  I've heard about this is various places; I think most recently it was in regard to women in physics but this is a widespread phenomenon in both genders. 

Honestly, I am hesitant to even write about this here.  Physics is a competitive profession.  I feel like a person's worth is usually judged on what you've done lately.  I am always afraid that I haven't accomplished enough to not be forgotten let alone respected.  And with my job being a temporary (I am a postdoctoral scholar - this is much like when a medical doctor goes through residencies after earning their medical degree) and on a yearly contract, not constantly earning respect means that I could lose my job all together.

It isn't something that I discuss with my co-workers; after all these are the people whose respect I am trying to earn and maintain.  I don't even bring it up to my friends because, since I really don't have much of a life outside of work, my friends are also physicists - sometimes even people I feel are my competition.  On my latest trip (to Santa Barbara, CA for the APS Executive Board retreat), I did bring this up in conversation over dinner (I felt more comfortable around these physicists since they are not in the same research circle as myself and I rarely see them).  As soon and I mentioned I'd been dealing with a bit of Impostor Syndrome the immediate response I got was, "We all feel that way."  At that, I didn't know how to respond since I was surprised at how open this person was with me.

So, how do I go about slaying this dragon?  Well, the first stage is messy and usually involves much anxiety and panic about the difference between what I feel I've accomplished and what I should have accomplished.  This then moves into a planning phase where I decide what I am going to do and is followed by a series of email feelers to people I need to collaborate with to perform the work.  By this time, I have usually exhausted myself (at least emotionally) and I wait for responses from collaborators.  If they are prompt, a new determined calm can begin to take root; otherwise, the anxiety increases again.  I start thinking, "Wow, I was right and everyone thinks so little of me that they don't want to work with me!"  (Note to self: next time check your spam filter before you flip out again.)  With a new plan of action intact, I get to start the cycle of the Impostor Syndrome again: "I have all this great work to do but I don't think that I am talented enough to complete it."  But, I plug away at it, complete tasks and rarely acknowledge what I've done.

The one good thing that comes from these episodes of mine is that it jump starts new projects for me.  It also reminds me of how lucky I am to have my husband since he is the only person with whom I share this insecurity.  The poor guy is my sounding board for all of the anxiety I've built up and there really isn't anything he can do for me.

A double rainbow taken from the LIGO Livingston Observatory parking lot on 30 June 2008.

This is a good article on the Impostor Syndrome: Laursen, Lucas, "No, You're Not an Impostor", Science Careers (15 February 2008).

***

Revised Erdös Number: 4

A friend of mine read my last blog post and showed that both of us (as members of the LIGO Scientific Collaboration) have a lower Erdös Number (4) than I noted in that post.  Here are the references establishing this network:

1: Paul Erdős & Mark Kac
    Erdös, P.; Kac, M. "The Gaussian law of errors in the theory of additive number theoretic functions",  Amer. J. Math.  62,  (1940). 738–742.
2: Mark Kac & Theodore A. Jacobson
    Gaveau B.; Jacobson T. ; Kac M.; Schulman L. S. "Relativistic extension of the analogy between quantum mechanics and Brownian motion", Phys. Rev. Lett. 53 (1984), no. 5, 419–422.
3. Theodore A. Jacobson & Bruce Allen
    Allen, Bruce; Jacobson, Theodore "Vector two-point functions in maximally symmetric spaces", Comm. Math. Phys. 103 (1986), no. 4, 669–692. 
4. Bruce Allen & Amber Stuver
    Abbott, B.; et al. "Detector description and performance for the first coincidence observations between LIGO and GEO," Nucl. Instrum. Methods A 517 (2004), 154 – 179.

Giving a Talk on Behalf of LIGO & APS April Meeting Wrap-up

Sorry for taking so long to round out my summary of the APS April Meeting.  My talk was on the last day of the meeting (3 May) and by the time I got home the next day I was suffering from a nice case of jet lag.  I know that there is only a 2-hour time change between Pacific and Central time, but it really hurt me this time.  I am just glad that I was able to recover from it over the weekend!

Let's talk about giving talks as a member of the LIGO Scientific Collaboration.  When we speak on results that took a substantial number of people to produce (which is most of our results) we need to give talks "on behalf of the LIGO Scientific Collaboration and the Virgo Collaboration."  Not only does this let the audience know that the person giving the talk isn't taking all the credit for the work, but that the talk has also been reviewed by the respective collaborations and approved.  This process isn't meant to be censorship; it is meant to ensure that there aren't people claiming to have results that are later refuted or otherwise change before a paper is published (like "we detected gravitational waves yesterday" [we didn't, this is just an example]).  That being said, my talk was on behalf of LIGO and Virgo and discussed the work we have been doing to collaborate the EM observatories to image parts of the sky where we think a gravitational wave may have originated.  My talk needed to be done at least a few days in advance to be sent out for review to the specific committees that give the final OK and to the working groups that produced the results I was speaking on (I sent my talk out on Friday and my talk was on Tuesday afternoon).  The final approved talk that I gave can be seen in the LIGO Document Control Center (DCC) here.

The talk went well with the one exception that I ran a little long in time.  I tend to like to talk about things that get me excited, and the topic of my talk certainly did!  However, I had only 10 minutes to talk followed by 2 minutes for questions.  I did finally wrap it up before they got the hook out for me though!  :)

In a previous post, I talked about the "Physics of Hollywood" session at the APS Meeting that included some Hollywood veterans.  The APS "Physics Buzz" blog also covered this in much more detail than I did.  If you would like to read more about it, you can read the first post (Q and A with Q, et al) here and the second (Writing Science Fiction: Trying to Avoid “The Button”) here!

Finally, I want to continue what seems to be a tradition of mine in sharing some of the more mundane views from my life by sharing the view from the 15th floor of the hotel I stayed in while I was in Anaheim, CA: 

This is facing south, if I was only facing north I would have had a peek at Disneyland!

Weekend at the APS April Meeting

The APS April Meeting started in full swing on Saturday 30 April.  The meeting is composed of many (~12 or so) parallel sessions during the day (form 8:30 am to 5 pm).  These sessions are composed of invited talk (about 30 minutes each) and contributed talks (about 12 minutes each).  In the evenings, there is usually a feature presentation and on Saturday night was on of the best ones I've been to.  This event was titled "The Physics of Hollywood" with panelists Bill Prady (executive producer and co-creator of "The Big Bang Theory"), Bruce Miller (executive producer of "Eureka") and John de Lancie (the character "Q" from "Star Trek: The Next Generation").  Junnifer Ouellette (author of "The Physics of the Buffyverse" was the moderator.  The picture below is from the back of the room when they were showing a clip from "The Big Bang Theory":

The panel at the front is hard to see here, so here is a zoom:

The people seated by the screen are (from right to left): Ouellette, Prady, Miller and de Lancie.  It was great!  They even answered one of the questions I have wondered about for a while:  Exactly what positions do these characters hold at the university?  They are clearly not grad students but they don't seem to be faculty members either.  Well, it turns out they are just like me...  They are postdocs!

I also had another "in the wild" sighting of the "Gravitational Waves" poster I worked on with the APS.  The picture below is the poster as it was distributed on the APS outreach table:

 

After another full day of listening to talks (I primarily go to sessions focused on gravity or education, unless there is something I don't specialize in that seems especially appealing) on Sunday, I had the Executive Committee Meeting of the Forum on Education (I serve on the Committee as an APS-AAPT Member-at-Large).  The FEd is just one of many units that members of the APS can join that address their special interest and their executive committees are the way these units are governed.  (Perhaps I should write a blog post detailing the governance structure of the APS - but perhaps that is more bureaucracy than anyone is really interested in...)  I may be very early in my career, but I have always felt welcomed by these physicists who are much more distinguished than myself.  So, I love going to these meetings (we only have one face-to-face meeting a year) and I get fed too!

That pretty much sums up my weekend at the APS April Meeting!  There are 2 more days left and I speak on the last day (Tuesday).  I am in the final stages of getting my talk approved by the LIGO and Virgo Collaborations since my talk is on their behalf.  I will write more about this process, how the talk went and about a few other things I got to do while at the meeting.

April APS Executive Board & Council Meetings

I've arrived at the site of the APS April Meeting after a few delays in my flights (the storms in the south and mid-west on the 27th required flight plan changes and congestion at airports).  As long as I make my connections (which I did since I had a 3.5 hour layover), I don't mind since I have a Kindle full of books (vampire books are my guilty pleasure).  However, I did land over an hour late at the Orange County Airport and after taking the SuperShuttle, I arrived at the hotel over a half an hour into the Executive Board dinner.  I was disappointed since the food is usually wonderful and the conversation even better but it wasn't horrible to jump into the shower and get to bed early.

The Executive Board Meeting started at 8:30 am on the 28th.  Like the last Board Meeting, strategic planning for the future years of the Society took up more than half of the day.  This planning is led by a facilitator to focus our discussions on a topic and organize the brainstorming conversation that results.  The experience has been a fulfilling one since I had a few ideas develop in the process and feel that they may become a reality in the future.  It feels good not only to have your ideas valued, but to feel like you are making a lasting impact on something.

Today is the Council Meeting.  Since I am writing this during this meeting, I don't have much to share so far.  However, the schedule for today is very similar to the meeting I described last November.  I did take a short walk to the back of the room and I thought you might be interested in what a meeting of the Council looks like:

Here, we are discussing the budget for 2012 and comparing it with the actual income and expenses for different activities (like publishing journals and professional meetings) of the society in past years.

As far as the April Meeting is concerned, over the last two days preparations for this have become apparent.  Registration booths have gone up outside of the hotel lobby, and display boards for research posters are up (see this post about what professional conference posters are like).  There are also more physicists milling about.  I find it interesting that I can identify other physicists but I'm not exactly sure what it is about a person that indicates that they are like me...  Is it they way they carry themselves?  Or is it they way they dress?  Or is it that these are the people who don't look like they are planning a day of fun at Disneyland (just up the road)?  By tomorrow, it will be very easy to tell since all of us will have name tags!

Well, it is almost break time in the Council Meeting...  I write more soon.  Have a great weekend!

Off to the APS April Meeting & Another View Out of My Office Window

This week I will be heading out to the American Physical Society's (APS) April Meeting.  There are 2 main meetings of the APS every year - the March Meeting and the April Meeting.  These meetings are separated by sub-fields of physics.  The March Meeting hosts materials physics, polymer physics, biological physics, condensed matter physics, chemical physics, etc.  The April Meeting hosts astrophysics, gravitational physics, particle physics, etc.  Since the communities of the April Meeting's sub-fields are fairly small (but related), the April Meeting is the smaller of the two.  I work in gravitation, so I go to the April Meeting (although I did get to go to the March Meeting for a day last year since I was invited to give a talk on the work done at the Science Education Center here at LIGO Livingston [read that abstract here]).

I plan on giving you a first hand account of the meeting from my experiences!  Thursday and Friday I will be in the APS Executive Board and then APS Council Meetings (which I've written about in the past when discussing professional service), and then the meeting itself starts on Saturday.  I will be giving a talk on Tuesday afternoon (the last day of the meeting); you can read the abstract for my talk here.

Until the excitement begins, I wanted to share with you a sight that I see out my window from time to time:

What you see here is the #2 dewar being filled with liquid nitrogen (you can see a condensation cloud to the left of the truck).  There are 4 such dewars on site, two on each arm with one being just outside of the corner of LIGO and one just before the end of the arm.  This liquid nitrogen is used to cool segments of the arms to near absolute zero (about 77 K) so that any stray gas that may have been introduced into LIGO (this includes residual gas from work being done within an end or corner chamber) freezes to the side of the segment and does not contaminate the vacuum in the rest of the arm.  The arms themselves have not seen atmospheric pressure since around 2000.

LIGO is one of the largest ultra-high vacuums on the planet with over 300,000 cubic feet of volume with a pressure about 1 trillion times less than the atmosphere.  And the scene above is one of the ways we are able to maintain such a high quality vacuum over long periods of time.

APS Executive Board, Council & Thanksgiving

I hope all my US readers has a nice Thanksgiving holiday!  It's been a while since I posted, so let me tell you a little about what I've been doing...

APS Executive Board & Council Meeting

My last post was about how doing professional service was a part of an academic life.  That is exactly what I went off to do between 18-19 November at the APS Executive Board and Council Meetings.  The first day, I flew out to Long Beach, CA where the meetings were taking place and, in the evening, I went to the Executive Board Dinner.  I always like these more informal gatherings since it allows me to learn more about the others and am serving with and I always learn some thing new, be it about physics or some other bit of wisdom.

 This is the view from my hotel room at the Long Beach Hyatt.  This is one of the best views I've ever had.

During the day of the 19th was the Executive Board Meeting and the Budget Committee Meeting.  This meeting is where a smaller group of people go into much more detail on topics that will be brought to the Council.  Basically, this is where many issues are debated first so that the Council Meetings proceed much more efficiently.  This was a full day of meetings for me as the Executive Board Meeting was followed by a meeting of the Budget Committee (on which I also serve).  This meeting of the Budget Committee saw the approval of the budget for next year.  While I'm not enthralled by accounting, I've learned so much about how a large society like the APS stays afloat.

The evening of the 19th was the usual Council Reception and Dinner.  This is just like the Executive Board Reception and Dinner, but we were treated to a special viewing of the Division on Fluid Dynamics' Gallery of Fluids in Motion (the Division of Fluid Dynamics meeting took place starting the day after the Council Meeting).  Then we were able to watch the incredible videos illustrating current fluid dynamics research (you can see them too here - you can also find the still images linked from that page).  My favorite one was the "Wet-Dog Shake" (found here - find the movie under "Ancillary Files" to the right of the page).

On the 20th was the Council Meeting (where I represent the Forum on Graduate Student Affairs).  These meetings are open to the membership and the usual agenda proceeds as follows:

• Approval of Minutes (8:30 AM)
• Report from the President
• Report from the Executive Officer
• Report from the Treasurer/Publisher
• Report from the Editor in Chief
• BREAK (10:10 AM)
• Fellowships
• Panel on Public Affairs
• LUNCH (Noon)
• Report from the Canadian Physical Society
• Report on Education and Diversity
• Report on Outreach
• BREAK (2:10 PM)
• Report on International Affairs
• Report from Washington
• Unit Bylaw Changes
• New Business
• CONCLUDE (3:30 PM)

There were several extra points to this regular agenda.  First was a debate on the merit of several proposed new prizes and awards to be awards by the APS or one of its units.  Next was a discussion on the formation of a new unit called the Forum on Outreach and Engaging the Public (units are special interest groups, called forums [non-research area specific] or topical groups or divisions [based on the number of members in the unit]).  Also, at every November Council Meeting, there is an election of 2nd year Councilors to the Executive Board and I was very happy to see colleagues of mine be elected.  The best part of the meeting was a lunch talk by one of APS members who worked in estimating the oil flow from the Deepwater Horizon Oil Spill this summer.  It was fascinating learning how these scientists went about making the estimates and why the estimates changed several times (basically, not all of the flow was oil [there was a significant amount of methane gas] and the oil was spewing into the Gulf from many different places).

My place at the APS Council Meeting.  Even though this meeting is open to the membership, I didn't want to take a picture of the other Councilors since I didn't have their permission to post their photo on this site.

I flew home on the 21st only to ship out again to visit my family for Thanksgiving on the 23rd...

Visit to My High School Alma Mater

Since I went home to visit my family, I contacted my old high school and asked if they would be interested in me coming in and talking to students.  They were nice enough to have me (and my husband) and we got to talk to the AP Physics class about what we do at LIGO; I talked about physics and my husband talked about engineering).  The most rewarding thing for me was that I was in that class with the same teacher (Hi, Mr. Bowman!) when I went there.  And it was there that I first fell in love with Relativity and gravity.  So it was great to come back full circle.  I also got to give a few copies of the poster I worked on with the APS to them (FYI, I'm not beyond shameless self-promotion.)

Thanksgiving

Thanksgiving went about as well as any family gathering goes.  It was great to see everyone, but it wasn't without its own stress.

Thanksgiving day was full of baking and cooking and eating :)  It was nice to get to see my family - especially my younger siblings!

I also got to have Thanksgiving, Round 2 with my husband's family on Saturday.  That's one of the nice things about marrying your high school sweetheart - their family usually lives close to yours and you don't have to chose who to visit on the big holidays.  Needless to say, I am very sick of turkey.

That's about all I have to talk about right now.  Maybe later I will bore you with a post about catching up on work after a trip out of town :)

Professional Service

Sorry about the slow posting this week!  I've been busy getting ready for a trip and Thanksgiving.  By themselves, they aren't that bad but I still need to get my regular work done so I've been trying to get ahead on that.  Hence, I haven't been on the blog as much as I'd like.

In my "About Me" section, I mention the 3 main parts of being an academic: research, teaching and service.  I've already talked about my research and teaching, so let me tell you a little about professional service.

Service covers basically any activity that enriches your profession but doesn't come in the form of teaching or performing research in whatever it is you do.  This could be sitting on a committee that helps ensure that the working environment is comfortable or you can serve the larger community through professional societies.  For physicists, the main professional society is the American Physical Society (APS) but I am also a member of the American Association of Physics Teachers (AAPT) and the American Astronomical Society (AAS).

This week, I am traveling to the APS Board and Council Meetings.  I sit on the APS Council as the representative of the Forum on Graduate Student Affairs (FGSA).  The Council is the legal decision making body of the APS and we vote on everything from general statements, to journal subscription rates.  Councilors are elected to the Board after 2 years (of a 4 year term) on the Council.  The Board does more behind the scenes discussions on matters before they are brought to the Council for a vote.  The Board meets 5 times a year and the Council twice (luckily for me, 2 of the Board Meetings happen the day before the Council meetings).  I will be sure to post later this week on what happens at these meetings.

Service is often seen as thankless work.  In many ways, it is.  That is one of the reasons I try to find ways to serve that I personally feel are fulfilling; that way even if no one notices the work I do, I still feel good about it.  Serving on the APS Board and Council is not only fulfilling, but I also feel deeply honored since I was elected by my peers to these posts.

Photo by Ken Cole, APS

The picture above shows Gay Stewart (University of Arkansas), Stefan Zollner (now of the New Mexico State University), and me at the LaserFest gala event that was held at the Smithsonian National Museum of American History on February 12th this year.  All of us are on the APS Council and were invited to represent the APS.  For me, this was a night when being nerdy was cool!  I got to mingle with several Nobel Prize winners.  This photo really doesn't show the extent that the Smithsonian went to for this gala.  You can read more about it and see great pictures here.  This is definitely a time when service was not thankless!

Conference Calls and a Poster

Conference Calls

When you work with scientists from around the world, you end up on a lot of phone meetings.  Today (and every Wednesday) I had two. 

The first one was the "Burst" data analysis call and I drew the short straw and got to take the minutes of the meeting.  I am not someone who is good with names (I once had a class of 4 students and I messed their names up all that time - I knew each person well, I just forgot their label); now imagine that you only have a voice to go on.  This is not my strong point but it wasn't too bad today.  We discussed what needs to be done now that our latest science data run is over to complete our analysis looking for gravitational waves.

The second call was with people I collaborate with at Penn State to keep the MATLAB library of software that has been written for various LIGO purposes available and up to date.  That doesn't mean that we write it all (I have only written some of it), but we work with the program authors to make sure that their work makes gets into the hands of the other scientists to use.  Right now we are working on taking some of the programs that have been written to perform utility functions (like checking to see if a time is in daylight savings or doing calculations on where a star was at any given time) and pulling them together into a general toolbox.  Creating a toolbox like this will help keep duplication of effort to a minimum (that is, to keep people from repeatedly reinventing the wheel) and help insure that users are getting the correct values from these basic utilities.  We are right in the middle of going through this pool of computer programs to make sure that they are documented well and up to date.

Poster

Last year, I had the honor and privilege of working with the APS to create a poster on gravitational waves.  It was a wonderful experience getting to be someone who communicated the science of LIGO to the public and I learned much from the APS editors on how to express concepts in more understandable ways.  I wrote way too much content for the poster with the idea that it is better to have too much and cut it down, than to not have enough and have to create more content later.  The side benefit to this is the full version of the text that I wrote was then adapted for the science pages on the ligo.org site!

The poster as premiered by the APS at the joint APS/AAPT Meeting in Washington, DC this past February.  LIGO also arranged to have the posters included with the November issue of the AAPT magazine "The Physics Teacher" and to have the posters mailed to every physics department in the US.  I was thrilled!  So, now I am starting to spot the poster in the wild.

A few days ago, a friends of mine who is now at the Coastal Carolina University sent me a picture of it hanging outside his office:

I also just got my November issue of "The Physics Teacher" and it was so cool to get a copy of the poster in my mail box!

If you would like to get a FREE copy, you can request it (or another great poster on the top 10 reasons to study physics) from the APS here.

Sorry for getting so giddy about this!  This is just one of those things that make your day and remind you why you get out of bed in the morning.  :)

Busy Last Week: SESAPS Meeting and LaserFest Teachers' Day

Sorry for the lack of posts but I have been completely knackered after the events of last week:


SESAPS Meeting @ LSU

The American Physical Society (APS) has regional section meetings across the country and the end of last week saw the Southeast Section Meeting of the APS Meeting at LSU.  Since Initial LIGO was decommissioned a few days before, LIGO opened up a few of its vacuum chambers to the SESAPS attendees to show off the optics that were contained within.  This was indeed a rare opportunity as the chambers are only opened in between science runs AND only when there was crucial work to be done on specific components.  I work on site and I have only ever gotten to see inside a few of the chambers before.

Over 100 (and I believe I am being conservative) guests visited LIGO on Thursday afternoon and toured the Science Education Center, control room and LVEA (Laser Vacuum Equipment Area, otherwise known as the corner of the LIGO detector where all the neat stuff is).

Above is the inside of HAM6 (Horizontal Access Module - it has a table inside in instead of hanging the equipment from the top of the chamber) which is the output of the LIGO detector.  The taller piece of equipment on the table is the Output Mode Cleaner (OMC) which will help insure that the laser light has optimal intensity and phase to be used to detect gravitational waves (you can read a more detailed description of this kind of mode cleaner here).

This is what is inside of BSC1 (Beam Splitter Chamber - the kind of chamber where the equipment is hung from the top of the chamber).  This mirror (which looks like glass, but the front surface has a transparent light purple coating to make it reflective to infrared light which is what our laser is) is called ITMY (Intermediate Test Mass on the Y [south] arm).  (Test mass is our complicated way of saying mirror.)  This mirror sits just after the corner beam splitter of LIGO to intercept the light returning from the end mirror to bounce it back to the end mirror - this bouncing happens about 100 times before the light gets past the ITM to recombine with the light coming from the X arm and go to the output (which you just saw in the previous picture).

This is a picture of me and my husband, Derek (who is an engineer at LIGO).  The bright light you see shining from the left is the spot light that is illuminating ITMY.  This isn't the best picture, but I just had to have a picture of us in front of this mirror before they closed the chamber up - which is exactly what they did just after this picture was taken!


LaserFest Teachers' Day
 

I've been talking lately about the workshop I've been planning for middle/high school teachers of physical science and physics.  Since 2010 is the 50th anniversary of the invention of the laser, this year is also LaserFest.  To that end, the professional societies whose research have benefited from lasers all got together to sponsor LaserFest and to promote the educational outreach of lasers.  Since the SESAPS Meeting was taking place at LSU with physicists from all over the region, I decided it would be great to organize a LaserFest Teachers' Day to focus on the classroom kits the APS is distributing for free to teachers and to invite the meeting physicists to have lunch with the teachers and chat about what they do.

Organizing this event was quite the journey.  The first thing that needed to be done was to find the funding for the event (even if the kits are free from the APS, there are costs for food, recruiting and other miscellaneous supplies) which was supplied by the APS Forum on Education, the American Association of Physics Teachers (AAPT) and the Optical Society of America (OSA).  Then I needed to recruit teachers from the surrounding areas.  I was lucky here since I work with the LIGO Science Education Center and was able to advertise this event through their contact who also helped to spread the word.  Then there is making sure that the supplies arrive in time, contracting catering for the event, making sure that the teachers know when and where to be and insuring that you have all the incidental supplies that are needed (e.g. the kits contain everything a teacher would need except things they should already have like scissors and tape - but I needed to make sure that we had those for the workshop).  I know that none of these things sound like a lot, but this reminded me a lot of the last days before my wedding when all the details needed to fall into place at the same time.

The day started at 9 am with breakfast followed by a wonderful talk by Dr. Ken Schafer who introduced us to the basic concepts that make a laser work, their history and their applications.  We then proceeded to the first of the 4 activities in the 2009 PhysicsQuest kit (which included a laser pointer, and LED light, polarizers, glow-in-the-dark vinyl and colored light filters).  At noon, we broke for lunch and chatting with some of the physicists visiting for the SESAPS Meeting.  The rest of the afternoon saw us working through the remaining 3 activities and the day concluded at about 3 pm.

The picture above is some of the teachers hard at work doing the laser activity where we measured the width of our hair by measuring the diffraction pattern made by shining the laser on the hair.  That explains why the teacher on the left is giving herself a hair cut!

The APS has put together a useful page on arranging a Teachers' Day of your own - see it here.

I know that there are many people out there with poor opinions of our education system and the teachers within it, but I was truly inspired by these teachers who attended this workshop on their own time and without pay so that they can learn how to do these activities and take them back into their classrooms.  These teachers definitely went above and beyond to better themselves and their students!

My Typical Monday at the LIGO Livingston Observatory

The morning starts at 9 am with a meeting that my husband (the engineer) needs to attend to address issues related to the upgrades that will be starting at the end of the week (these upgrades are for the Advanced LIGO detectors which I will write a more detailed post on later).  Since I don't have to be at that meeting (being that I am a data analyst and I don't get to touch the detector nearly as much as I would like) I start replying to emails and preparing for the work that needs to be done after all my meetings are over.

My first meeting is at 10 am and this is an observatory staff meeting.  This is when we talk about the visitors that will be on site this week, any new hires or job postings that are going up and have a general round robin to get an overview of the work that will be going on during the week.  This does not mean this is the only meeting to discuss the various activities that will be going on - this is just an overview so that everyone has a general sense of the work for the week.  During the week, there are more detailed meetings between the staff that work on different projects as well as a meeting everyone doing work must attend to get their work permits reviewed and approved.  (Work permits are descriptions of the work that needs to be done as well as the safety issues that may be involved.  It isn't uncommon for work between groups to conflict and potentially cause safety hazards; work permit meetings help keep that from happening.)  After this round-robin, the meeting is usually dismissed unless there is a pressing presentation that needs to be made.  Today we had a presentation on OSHA work safety regulations since the new work for Advanced LIGO will be more involved than the day-to-day work at the observatory has been for years.  (If you can't tell, we take safety very seriously here at LIGO!)

At 11 am I have a meeting with the Science Education Staff to discuss the school field trip visits, teacher professional development workshops, tours, etc. that we may be having this week.  This meeting was a busy one since there is a Southeast Section of the APS Meeting taking place at LSU at the end of the week and the scientists attending this meeting will be touring the facility (the observatory and the Science Education Center), there is a MIT tour this week and the Teachers' Day I have been organizing is taking place on Saturday at LSU.  All of this is in addition to the school field trips we have scheduled.  So today's meeting focused on making sure all of us knew what we where in charge of and to discuss the help we needed from the other staff members.

Then I am off to my office to start working for the day (unless I decide it is a good time for lunch, then I start working after that).  Today I have been making many phone calls and emails to finalize the details of the Teachers' Day I've been planning.  I communicated with the APS who is supplying me with the physical materials the teachers will use and take back to their classrooms, I ordered the breakfast and lunch items for the teachers, I contacted the organizers of the APS meeting to help me recruit physicists to have lunch and talk with my teachers and to help me find a laser specialist to give an opening talk on lasers (the Teachers' Day is LaserFest themed since 2010 is the 50th anniversary of the laser), I contacted LSU about on-campus parking for the teachers, I contacted the LSU physics department to make sure I have a room for the workshop (and I still need to figure out where lunch is going to happen) and I made a list of all the other stuff that still needs to be done.  <Catching my breath...>  Everything seems to be coming together nicely and I the teachers I've worked with in the past have always been so wonderful that I am sure that bumps in the road won't derail the day.

Science wise, I have been communicating with a physicist who is interested in using the simulations that I produce for the burst gravitational wave search to apply them to the search for gravitational waves from inspiralling neutron star and/or black hole pairs.  We will call each other to talk about this tomorrow afternoon.  Also, I have been communicating with a friend I am working with regarding a project of mine that checks that for the detection delay between gravitational wave detectors (we expect gravitational waves to travel at the speed of light), what the possible range in detection strengths we can measure are for real (physical) gravitational waves.  Our conversation today focused on reapplying this to try to figure out where on the sky the source may have been.  Together, we hope to reapply this work for the inspiral gravitational wave search.

That's been my day so far.  I think I am going to stop by LSU today to check out the room that has been reserved for the workshop so that I know what I am dealing with.

My parting picture for you today is my desk lamp where I collect name tags from meetings I've gone to.  I think I might need to clear the older ones off since my husband says that this is a fire hazard (it isn't but it is starting to get difficult for the light to get out of the lamp and be useful to me):

This is something I look at every day.

Have a great week!

Introduction

I have been meaning to start this blog for some time now. What you will find here is information about what being a LIGO scientist is like. LIGO is a new kind of observatory that is seeks to view the Universe through minute changes in the gravitational field due to some of the most massive and/or energetic events - like 2 black holes colliding. These changes in the gravitational field are called gravitational waves.

I work at the LIGO Livingston Observatory in Louisiana (about 45 min. east of Baton Rouge). There is another LIGO Observatory in Hanford, Washington (on the Hanford Nuclear Reservation where the plutonium for 'Fat Man' was refined). We also work with international partners: Virgo in Italy (funded by Italy, France and the Netherlands), GEO in Germany (funded by Germany and the United Kingdom), and TAMA in Japan.

My job title is "Senior Postdoctoral Scholar in Physics" at Caltech (although I live and work in Louisiana). If you are not familiar with academic job titles, this means that I am a low man on the totem pole. But I love my job and my life! One of the reasons that I am so happy with my situation is that I have the job I want and I get to live with my husband (who is an engineer). It isn't uncommon in physics to have to live somewhere other than with your spouse when you are establishing yourself, especially when your spouse has a career of their own (physicists call this the two-body problem). For now, at least, my husband and I both work at LIGO Livingston.

My time at work is spent doing traditional LIGO research and working with the LIGO Science Education Center staff. To me, this is like having my cake and getting to eat it too; I get to share my love for my work with visiting students and the public while getting to work on site seeking gravitational waves. I have also been honored to be elected to leadership roles in the professional society of physicists (the American Physical Society). I hope to get to share my experiences in service, teaching and research through this blog.

I intend to update this blog regularly. If you have any questions, please feel free to post them here and I will try to answer them. But please know that I am not here to argue the validity of General Relativity or alternate theories so I will not address those questions or comments. That doesn't mean that you can't ask physics questions, I'm just not going to argue with you when you try to convince me or others that LIGO won't work because Einstein was wrong about something.

I hope that the material that will be posted here will be useful to someone. I hope that students who are considering becoming scientists and others who are simply interested in this new method of astronomy find this interesting.

- Amber L. Stuver