Beam Test Jul 20 2012
We started up the accelerator where we left from yesterday.
Tune
| Energy Switch | Out (High En) |
| Solenoid 1 | 6.1 A |
| Solenoid 2 | 3.2 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 | 2856.310 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 |
Detector tests
Beam Left Detector
Electron gun trigger and detector diode signal put into and logic. We want to put the annihilation target in and out, see how it affects the rate.
quad settings after T1 (Target 1, positron production target).
q4 q5 q6 q7 q8 q9 q10 -0.0 +0.5 +0.0 +0.0 -1.0 -0.0 +0.0
Mode Annihilation Target Slit width D1(A) D2(A) Counts / Time(s) Rate(Hz) e+ in 1.00 cm 4.2 4.2 445 / 199.9 2.2 e+ out 1.00 cm 4.2 4.2 545 / 199.9 2.7 e+ in 1.00 cm 4.2 4.2 241 / 99.8 2.4 e+ out 1.00 cm 4.2 4.2 268 / 99.9 2.7 e+ out 0.20 cm 4.2 4.2 692 / 200 3.5 e+ in 0.20 cm 4.2 4.2 1178 / 199.9 5.9 e+ in 0.20 cm 4.2 5.8 724 / 200 3.6 e+ out 0.20 cm 4.2 5.8 1175 / 299.9 3.9
Added 10 inches of Polyethylene brick wall to shield detector left.
Mode Annihilation Target Slit width D1(A) D2(A) Counts / Time(s) Rate(Hz) e+ out 0.20 cm 4.2 5.8 942 / 200 4.7 e+ in 0.20 cm 4.2 5.8 960 / 200.1 4.8 e+ in 0.20 cm 4.2 4.2 1037 / 199.8 5.2 e+ out 0.20 cm 4.2 4.2 /
q4 q5 q6 q7 q8 q9 q10 -0.0 +0.5 +0.4 +4.5 -1.0 -0.0 +0.0