Beam Test Jul 12 2012
JAI Camera Triggering
The fall of the TTL pulse triggers the camera.
Camera trigger should arrive at lest 30 micro-second earlier than RF pulse to get the beam image on the OTR.
To do this the first RF pulse trigger should be delayed to trigger the camera for the next RF pulse.
- Note
- RF not would trigger the camera. We added a ground strap to the double shielded BNC cable and covered some unshielded cables with tin foil. This stopped the RF from triggering the camera.
tune 3 MeV electrons to the 90 degree line
tune to 0 degree line
Determine the magnet settings needed to optimize the current to FC1.
Take a picture of the beam spot on the YaG and FC1
| Energy Switch | Out (High En Range) |
| Solenoid 1 | 7.8 A |
| Solenoid 2 | 3.9 A |
| Gun Hor | 0.1 A |
| Gun Ver | 0 A |
| Output Hor | 0.3 A |
| Output Ver | 0.3 A |
| Rep Rate | 6 |
| Gun HV | 10 (Knob Setting) |
| Gun Grid Voltage | 10(Knob Setting) |
| RF frequency | 2856.268 MHz |
| Modulator HV Power Supply | 3.66 (Knob Setting) |
| RF macro Pulse Length (FWHM) | 200 ns |
| Q1 (A) | 0 |
| Q2 (A) | 0 |
| Q3 (A) | 0 |
| Q4 (A) | 0 |
| Q5 (A) | 0 |
| Q6 (A) | 0 |
tune to 45 degree line
Optimize the current to FC2 using Quad 7 and the energy slits
Q7 did not help to increase beam current at FC45
document the magnet element settings and current to FC2.
Transmission from zero Line to 45 degree line is about 4%.
Increased Reprate to 17 Hz and Minor tune change
When reprate was at 6 Hz, the current was too low. So, the reprate was increased. to 17 Hz.
| Energy Switch | Out (High En Range) |
| Solenoid 1 | 6.1 A |
| Solenoid 2 | 2.7 A |
| Gun Hor | 0.1 A |
| Gun Ver | 0 A |
| Output Hor | 0.4 A |
| Output Ver | 0.4 A |
| Rep Rate | 17 |
| Gun HV | 10 (Knob Setting) |
| Gun Grid Voltage | 10(Knob Setting) |
| RF frequency | 2856.817 MHz |
| Modulator HV Power Supply | 3.66 (Knob Setting) |
| RF macro Pulse Length (FWHM) | 200 ns |
| Q1 (A) | 0 |
| Q2 (A) | 0 |
| Q3 (A) | 0 |
| Q4 (A) | 0 |
| Q5 (A) | 0 |
| Q6 (A) | 0 |
tune to 90 degree
Optimize current to FC3 using last 3 quads
Take scope picture
trasmission
Make several measurements using all three FCs to determine the transmission.
Do this by transporting beam to each several times.
OTR and YAG comparison
Beam Tuned to 10 MeV
| Energy Switch | In (Low En Range) |
| Solenoid 1 | 5 A |
| Solenoid 2 | 5.7 A |
| Gun Hor | - 0.1 A |
| Gun Ver | 0 A |
| Output Hor | 0 A |
| Output Ver | 0 A |
| Rep Rate | 29 |
| Gun HV | 10 (Knob Setting) |
| Gun Grid Voltage | 10 (Knob Setting) |
| RF frequency | 2856.297 MHz |
| Modulator HV Power Supply | 4.13 (Knob Setting) |
| RF macro Pulse Length (FWHM) | 200 ns |
| Q1 (A) | 1 |
| Q2 (A) | 1 |
| Q3 (A) | 2 |
| Q4 (A) | 0 |
| Q5 (A) | 0 |
| Q6 (A) | 0 |
We were not be able to see the beam spot. So, we tuned energy up to see the beam.
I think the reason is becase the pulse length is short. It is 200 ns.
11~15 Mev
We were not be able to see the beam spot. So, we tuned energy up to see the beam. RF power nub was at 4.32, we are not about the energy.
| Energy Switch | In (Low En Range) |
| Solenoid 1 | 8.8 A |
| Solenoid 2 | 5.7 A |
| Gun Hor | 0 A |
| Gun Ver | 0 A |
| Output Hor | 0 A |
| Output Ver | 0.4 A |
| Rep Rate | 20 |
| Gun HV | 10 (Knob Setting) |
| Gun Grid Voltage | 10(Knob Setting) |
| RF frequency | 2856.297 MHz |
| Modulator HV Power Supply | 4.32 (Knob Setting) |
| RF macro Pulse Length (FWHM) | 200 ns |
| Q1 (A) | -0.9 |
| Q2 (A) | 0 |
| Q3 (A) | -0.1 |
| Q4 (A) | +0.9 |
| Q5 (A) | 0 |
| Q6 (A) | -0.5 |