Beam Test Jul 19 2012

Tune up 10 MeV on the zero line.

Insert Tungsten target and do a dipole scan to determine relative yield as a function of energy. Attempt to measure relative yield using integral of thick scintillator output for constant current and energy slit setting.

10 MeV Tune

Energy Switch	Out (High En)
Solenoid 1	6.2 A
Solenoid 2	3.3 A
Gun Hor	-0.2 A
Gun Ver	0 A
Output Hor	-0.3 A
Output Ver	0 A
Rep Rate	8
Gun HV	10 (Knob Setting)
Gun Grid Voltage	10 (Knob Setting)
RF frequency	2856.320 MHz
Modulator HV Power Supply	4.28 (Knob Setting)
RF macro Pulse Length (FWHM)	300 ns
Q1 (A)	-3.7
Q2 (A)	-5.5
Q3 (A)	+0.6

Counting single pulse

Settings

Gun Grid Voltage knob setting: 2.85

Energy Switch	Out (High En)
Solenoid 1	6.2 A
Solenoid 2	3.3 A
Gun Hor	-0.2 A
Gun Ver	0 A
Output Hor	-0.3 A
Output Ver	0 A
Rep Rate	8
Gun HV	10 (Knob Setting)
Gun Grid Voltage	2.85 (Knob Setting)
RF frequency	2856.320 MHz
Modulator HV Power Supply	4.28 (Knob Setting)
RF macro Pulse Length (FWHM)	300 ns
Q1 (A)	-3.7
Q2 (A)	-5.5
Q3 (A)	+0.6

W1

Sweeping magnet

D1 (A)

D2 (A)

Mode

Jaw width (cm)

Sintilator HV

q4 (A)

q5 (A)

q6 (A)

q7 (A)

q8 (A)

q9 (A)

q10 (A)

conditions

in

out

4.2

4.2

2 MeV e-

1

1219 V

+1

-0

-0.1

-0

+1.3

+0.5

-0

D1 & D2 set to 2 MeV e-

Optimization of the magnets in positron mode:

q4    q5   q6     q7    q8     q9     q10       counts   /    time (s)    Rate (Hz)
+1   -0.0  -0.1   +4.0  +1.0   +0.5   -0.0      740      /    201.4       3.67
+1   -0.0  -0.1   +4.5  +1.0   +0.5   -0.0      611      /    149.9       4.08
+1   -0.0  -0.1   +5.0  +1.0   +0.5   -0.0      360      /    100         3.6      
+1   -0.0  -0.1   +4.7  +1.0   +0.5   -0.0      309      /    80.1        3.86
+1   -0.0  -0.1   +4.3  +1.0   +0.5   -0.0      220      /    60.1        3.66