Beam Test Jul 27 2012

Tune

Energy Switch	Out (High En)
Solenoid 1	12.4 A
Solenoid 2	7.3 A
Gun Hor	-0 A
Gun Ver	+0.2 A
Output Hor	-0.3 A
Output Ver	-0 A
Rep Rate	17
Gun HV	10 (Knob Setting)
Gun Grid Voltage	10 (Knob Setting)
RF frequency	2856.315 MHz
Modulator HV Power Supply	4.19 (Knob Setting)
RF macro Pulse Length (FWHM)	300 ns
Q1 (A)	-3
Q2 (A)	+0
Q3 (A)	+2
Q4 (A)	0
Q5 (A)	0
Q6 (A)	0
Current at FC0	100 mA

Beam Current Calibration of Scint Left

Determine if the Beam Left Scintillator is linear with beam current.

Determine if the Beam Left Scintillator is linear with beam current.

Beam Current Calibration of Scint Left

Determine if the Beam Left Scintillator is linear with beam current.

run#	Scope Pics	FC1 area nVs	Scint L area nVs	Scint Left (Ch9)	Reprate	start	stop	Int Rate	comments
3703		[math]1201.1 \pm 10.1[/math]	[math]4.4 \pm .3[/math]	1127.75 [math] \pm[/math] .7	100	08:38:24	08:41:52 ( s)	38.4 events/s	first measurement at full current
3705		[math]776.8 \pm 112[/math]	[math]7.26 \pm 4.5[/math]	782.5 [math] \pm[/math] 1	100	09:01:10	09:04:29 ( s)	38.47 events/s	cut the current in half
3706		[math]367.7 \pm 2.32[/math]	[math]6.5 \pm .34[/math]	239.1 [math] \pm[/math] 0.6	100	09:08:40	09:12:13 ( s)	38 events/s	cut the current to its 1/4 th
3707		[math]203.1 \pm 0.7[/math]	[math]0.2 \pm 1[/math]		100	09:16:19	09:21:24 ( s)	38.5 events/s	cut the current to its 1/8 th

1. T1 out, disable D1 (Q4,Q5,Q6 too), send the beam to FC0, take scope image of the area.

2. T1 in, enable D1 (Q4,Q5,Q6 too), bend the beam by 90 deg, take a run with 1000 events.

1.22 nV s /ADC channel

Energy calibration of Scint 1

With T1 ande T2 out, send 1,2,6, and 10 MeV electrons to Scintillator 1 located at the end of the 90 degree beam line

HV=1300

run#	Electron Energy (MeV)	Attenuation (dB)	ADC2
3714	10	27.5	3009
3715	6	27.5	2935
3716	4	27.5	3018

Inserted gun triggers into Scaler channel 2

Resume positron production using 10 MeV eletrons

Insert Gun trigger into VME scaler

Set D2 for 2 MeV

run#	T1	T2	Sweep Magnet	logic	HV-D2L	HV-D1R	Reprate	start	stop	Int Rate	comments
3719	in	in	out	(DL & GunTrig) & (DR & GunTrig)	1150V	1150V	200	11:03:02	11:21:58	4.2 events/s
3720	in	in	out	(DL & GunTrig) & (DR & GunTrig)	1150V	1150V	200	11:29:52	11:44:55	5.069 events/s
3721	in	out	out	(DL & GunTrig) & (DR & GunTrig)	1150V	1150V	200	12:02:31	12:17:32	3.9 events/s
3722	in	in	out	(DL & GunTrig) & (DR & GunTrig)	1150V	1150V	200	12:02:31	12:17:32	events/s