Here are some animated GIFs made from
display pictures of cosmic rays taken during different phases of Integration and
Test of the LAT instrument. The blue lines are the reconstructed tracks, the
lines or crosses are the tracker clusters and the
red cubes are crystals in the
calorimeter. The yellow line is the extrapolation
of the reconstructed track (so you can see which ACD tile the particle crossed).
The red square in an ACD tile is the center of the
ACD tile with the smallest DOCA. The color of the ACD tiles depends on the
threshold the signal in that tile passed: Red for Veto and
Purple for the zero-suppression threshold. Please remember to thank Riccardo "Mr. FRED" Giannitrapani if you
use these movies.
- LAT cosmic ray run with FSW:
Run 077001260. For this particular run the
Run and Event ID are not available in the event display. Also note that the
ACD is turned off.
- LAT SVAC muon run:
- LAT: The first events from an ACD CPT run. The yellow line is the extrapolation
of the reconstructed track so you can see which ACD tile the particle
crossed. The filled red square is the center of the ACD tile with the
smallest DOCA (we are working on adding all the tiles that are hit).
- Sixteen towers (without the ACD): Muons (all
views, rotated view)
- Eight towers:
towers: This is a test run with the two most recent CALs not
Four towers: The instrument is now calibrated.
towers: Not everything looks like a muon ....
Four Towers: This is a test run
with four towers in the grid. The instrument is not
completely calibrated which can be seen as increased noise in the
calorimeters. The tracks were required to through three towers which
means that they barely touch the calorimeter.
Made from a series of short non-calibrated test runs.
Single event in 360 degrees and
a series of events.