I am not familiar with the experiment, so I have to ask some dumb questions:
Ed,
Or, you could say "I am not familiar with the experiment, so I have
to spend a few minutes to find out for myself" ;-)
There are numerous popular articles about the issue. If you are
technically inclined read the original paper here:
http://arxiv.org/abs/1109.4897
The PDF file is
http://arxiv.org/pdf/1109.4897v1
Or start with the CERN press release:
http://public.web.cern.ch/press/pressreleases/Releases2011/PR19.11E.html
In addition you can find many details on the timing system at:
http://www.ohwr.org/projects/cngs-time-transfer/wiki
First, I wonder how the "beam" is generated at the source, and then
They come in bursts as you suggested.
The next question is whether that 60 nSec or so measurement is
"sharp," or is it the mean value of a large, wide distribution of
See the wonderful plots in the paper.
The final question for now is how big is the detector? As I
The detector is not the liquid kind you're thinking of. But it is
very large with lots of detectors and calibrated delays.
Do a google image search for: OPERA Gran Sasso detector
Several high resolution photos are:
http://newscenter.lbl.gov/wp-content/uploads/OPERA-detector.jpg
http://www.symmetrymagazine.org/breaking/wp-content/uploads/2010/05/opera.jpg
http://www.aspera-eu.org/images/stories/Media/MEDIAPICTURES/HR2/gran-sasso2.jpg
Finally this drawing nicely shows the scale too:
http://w3.iihe.ac.be/opera/detector-artistic2.jpg
(from the excellent page: http://w3.iihe.ac.be/opera/)
/tvb
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