Quick Overview of TkrTotalHits
Data for Light Test
077006514-07706521
• Xenon lamp illuminated grid perimeter and
+Y and –X faces of ACD.
• Lamp scanned manually across LAT for
half of 10 min run.
• Light files 077006514-20
• Dark file 07706521
Simple Test
• Looked at TkrTotalHits range of 5-15 hits for a
LAT half
• Light and dark files were normalized to cover the
same amount of time.
• Excluded Tower 15 which showed a large flare,
unrelated to the light test
• Subtracted the dark file from a single light file.
Fit a constant to the data. If zero fell within 1.5
standard deviations of the fitted constant, that
half of the LAT passed this light test.
• All light files passed.
Light
Dark
TkrTotal Hits
-X half of LAT
Light file: 077006518
Dark file: 077006521
const = -.364
Std= 1.82