ID Lab x-ray FEL Detector & DAQ

Experiment #2

Sept 16, 2010

Experiment 2 diagram

Experiment 2 Proposal

Objectives:
  1. Commission MPPC-based x-ray monitoring
  2. 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