Beam Test Jul 27 2012

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Tune

Energy Switch Out (High En)
Solenoid 1 13.9 A
Solenoid 2 4.1 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# FC1 Scint Left (Ch9) Reprate start stop Int Rate comments
3703 R3703 FC1.png R3703 SCNT L.png 100 08:38:24 08:41:52 ( s) 38.4 events/s first measurement at full current
3705 R3704 FC1.png R3704 SCNT L.png 100 09:01:10 09:04:29 ( s) 38.47 events/s cut the current in half
3706 R3706 FC1.pngR3706 SCNT L.png 100 09:08:40 09:12:13 ( s) 38 events/s cut the current to its 1/4 th
3707 R3707 FC1.png R3707 SCNT L.png 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.

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

Resume positron production using 10 MeV eletrons

Insert Gun trigger into VME scaler

Set D2 for 2 MeV

Set D2 for 1 MeV

Set D2 for 3 MeV

Look for positrons using 6 MeV electrons