PePPO 03132012

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Accelerator Configuration

Accelerator Settings
beam energy 6.8 MeV
Beam type: Electron
I_average: 0.3 nA
I_peak: 0.05[math] \mu[/math] A 0.006 duty factor
pulse width: 10 [math]\mu[/math]s (it seems on 200 [math] \mu[/math]s is possible?)
Rate: 60 Hz
PEPPO Spectrometer: 151.3 A

Set HV to Detectors

Signal channel HV dac HV (V)
Detectors #1 A1 2.4 960
Detectors #2 A2 3.0 1200

How to turn HV On


Scope Pictures

CH1: Beam Sync CH2: A1 CH3: A2

Target Pictures
No Target 1 03132012 AnnhCountScopePic.png 2 03132012 AnnhCountScopePic.png
Chromox Target 3 03132012 AnnhCountScopePic.png 4 03132012 AnnhCountScopePic.png

Run Plan

Signal Definitions for Trigger logic
SYNC:=60 Hz sync pulse 200 micro seconds long
Det1:= Annihilation Counter #1 (HV1)
Det2:=Annihilation Counter #2 (HV2)


Please make the following measurements


Run# run mode Run length Beam Target Trig Logic VME discriminator Threshold (mV) HV1 (setting/V) HV2 (setting/V) PL (setting/ns) PTW (setting/ns)
2902 sample 5 minutes e[math]^-[/math] Chromox (Det1 OR Det2) 50 2.4/960 3/1200 280/1120 250/1000
2903 sample 5 minutes e[math]^-[/math] Empty (Det1 OR Det2) 50 2.4/960 3/1200 280/1120 250/1000
2905 sample 10 minutes e[math]^-[/math] Chromox Det1 AND Det2 50 2.4/960 3/1200 280/1120 250/1000
2904 sample 15 minutes e[math]^-[/math] Empty Det1 AND Det2 50 2.4/960 3/1200 280/1120 250/1000
2908 sample 30 minutes After Beam Studies end off out (Det1 or Det2) 50 2.4/960 3/1200 280/1120 250/1000
2909 sample 30 minutes After Beam Studies end off out (Det1 AND Det2) 50 2.4/960 3/1200 280/1120 250/1000