ID
Lab x-ray FEL Detector & DAQ
Experiment
#2
Sept 16, 2010
Experiment 2 Proposal
Objectives:
- Commission MPPC-based x-ray monitoring
- HPK PMT with scintillator (off axis) + amplifier for background
monitoring
Beam request: all
background monitoring can be done parasitic with other machine
operations. 2x dedicated 5
minute bremsstrahlung target in runs
Experiment 2 Execution
Background samples were taken at other
times, but the key run period for the analysis is the following:
Timeline:
16:28 - 16:31 Background sample -- beam delivered to beam dump
16:32
Foil
in,
x-rays observed, PMT gain @ 740mV
16:35
PMT
saturating,
gain adjust 740mV --> 640mV
(tried
adding
an amplifier to boost
16:47
Foil
out,
x-ray run terminated, PMT gain left @ 640mV
TARGET_eval Channel (count from 0/from 1) mapping this run:
Channel 15/16 =
PIN diode
Channel 13/14 =
PMT amplified
Channel 11/12 =
MPPC (KLM TIA)
Summary
slides
(some work still needed) [pptx]
[PDF]
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Last modified: 9/28/2010 --
GSV