Beam Test Jul 19 2012

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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.

HRRL 10MeVePdist 71812.png

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