NuMI-L-661 'Photoelectron Counting by Several Methods'
December '98 M16 with Hammamatsu base (8J04C5)
Old M16 with Hammamatsu linear base
M64 received Apr '99, with Hammamatsu base:
summary
first 4 y slices
last 4 y slices
M64 received May '99, with Hammamatsu base (loaner)
outline 9f04a4
outline 9f03a4
outline ga0024
outline ga0023
linearity for M64 using independent light measurement
linearity for M64 using M64 calculated light measurement
old M64 single p.e. spectra
new M64 single p.e. spectra
relative light measurement for M16, old M64 and new m64
secondary emission calculation
comparison of cross talk for new M64s vs old M64s at 900V
comparison of cross talk for M16s vs all M64s at 900V
comparison of cross talk for M16s vs new M64s at 900V
response as a fraction of highest pixel for M16s vs M64s at 900V
comparison of gains for new M64s vs old M64s at 900V (Standard
Hamamatsu Base)
cross talk asymmetry for M64s? NOT
sigma/mean for gain for M16 vs M64
photoelectron response for all fiber positions for a selection of tubes
Difference between measured and calculated pedestal values.
This plot shows that the online calculation of the pedestal (used in
all the texas scans and the M64 cross talk calculations) overestimates
the mean and the width of the pedestals. This might indicate that the
cross talk has been underestimated in all cases and also that the
optical crosstalk from reflections from the glass is indeed present.
Draft proposal for Calibration Module running at
CERN