PePPO 03132012

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
Chromox Target

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)
	sample	5 minutes	e[math]^-[/math]	Chromox	SYNC AND (Det1 OR Det2)	50	2.4/960	3/1200	280/1120	250/1000
	sample	5 minutes	e[math]^-[/math]	Empty	SYNC AND (Det1 OR Det2)	50	2.4/960	3/1200	280/1120	250/1000
	sample	10 minutes	e[math]^-[/math]	Chromox	SYNC AND Det1 AND Det2	50	2.4/960	3/1200	280/1120	250/1000
	sample	15 minutes	e[math]^-[/math]	Empty	SYNC AND Det1 AND Det2	50	2.4/960	3/1200	280/1120	250/1000
	sample	30 minutes After Beam Studies end	off	out	(Det1 or Det2)	50	2.4/960	3/1200	280/1120	250/1000