That only took about 3 hours to do. Alex of course has all of the Tufts minos computer hotwired so that mysql refused to work. Fiddled with the scripts, reset the root password, all that jazz. Then I managed to install moveable type without killing myself, and now I get to actually make an entry...
Here's the latest result on the Daya Bay scintillation work.
This time I've got the full fibre model included, as well as the scintillator optics.
The code evolves some more. Support for multiple fibre in place but untried.
Below, I show what happens to a MINOS strip if you move the fibre to 1.5cm off the axis. Interestingly, the total response of the strip drops only a small amount, though obviously the position response changes substantially.
Below are plots showing the path-length of photons in the scintillator and the number of bounces, for both simulated MINOS and OPERA strips. The blue curves show the distributions for photons that survive to the fibre, while the black curves are photons that miss the fibre.
The bottom line is:
Photons tend to travel further in MINOS strips, which isn't too surprising.
Photons tend to bounce more often in the MINOS strips, which again isn't too surprising.
Update: Rebuilt to get pathlength right.
OK, let's see how things work when we make the strip very wide indeed. Below are the results for 40cm-wide strips with a single fibre (MINOS-style).
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