Beam Test Apr 24 2012
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Getting Ready Punchlist
1) Get matlab ready for emittance measurement. (Not done due to Matlab licence issue)
(Done) 2) Install control box. (Done) 3) Clean up imaging system. (Done) 4) Determine dipole current setting.
Test List
Energy Test
1. Chad tunes HRRL
- 4.11
RF: 2857.351
| MOD HVPS | RF | FC1 | |
| 4.11 (nob) | 2857.351 | 34.2 mA |
Test beam stability at different energies
Start from 2 MeV go up energy.
Assuming magnet polarity swith "up" as positive and "down" as negative.
16 MeV
| e- Beam Energy (estimate) | 16 MeV |
| Solenoid 1 | 16.2 A |
| Solenoid 2 | 0 A |
| Gun Ver | -0.2 A |
| Gun Hor | 0 A |
| Output Hor | -0.3 A |
| Output Ver | -1.2 A |
| Gun HV | (Knob Setting) |
| Gun Grid Voltage | (Knob Setting) |
| RF frequency | 2856.382 MHz |
| Modulator HV Power Supply | 4.98 (Knob Setting) |
| RF macro Pulse Length (FWHM) | 300 ns |
| Q1 (A) | 0 |
| Q2 (A) | 0.6 |
| Q3 (A) | 0 |
| Q4 (A) | +10 |
| Q5 (A) | -7 |
| Q6 (A) | -5 |
| Peak Current on FC | 135 mAmps |
| Scope on FC | 200 px |
| Beam Spot | 200 px |
14 MeV
| e- Beam Energy (estimate from 2011 Mar setting) | 14 MeV (with big power supply Check with chad) |
| Solenoid 1 | 16.2 A |
| Solenoid 2 | 0 A |
| Gun Ver | -0.2 A |
| Gun Hor | 0 A |
| Output Hor | -0.3 A |
| Output Ver | -1.2 A |
| Gun HV | (Knob Setting) |
| Gun Grid Voltage | (Knob Setting) |
| RF frequency | 2856.382 MHz |
| Modulator HV Power Supply | 4.40 (Knob Setting) |
| RF macro Pulse Length (FWHM) | 300 ns |
| Q1 (A) | 0 |
| Q2 (A) | 0 |
| Q3 (A) | 0 |
| Q4 (A) | +10 |
| Q5 (A) | -7 |
| Q6 (A) | -4 |
| Peak Current on FC | 88 mAmps |
| Scope on FC | 200 px |
| Beam Spot | 200 px |
10 MeV First Setting
| e- Beam Energy () | |
| Solenoid 1 | 16.2 A |
| Solenoid 2 | 0 A |
| Gun Ver | -0.2 A |
| Gun Hor | 0 A |
| Output Hor | -0.3 A |
| Output Ver | -1.2 A |
| Gun HV | (Knob Setting) |
| Gun Grid Voltage | (Knob Setting) |
| RF frequency | 2856.382 MHz |
| Modulator HV Power Supply | 4.40 (Knob Setting) |
| RF macro Pulse Length (FWHM) | 300 ns |
| Q1 (A) | 0 |
| Q2 (A) | 0 |
| Q3 (A) | 0 |
| Q4 (A) | +10 |
| Q5 (A) | -7 |
| Q6 (A) | -4 |
| Peak Current on FC | 88 mAmps |
| Scope on FC | 200 px |
| Beam Spot | 200 px |
10 MeV Second Setting- Saidq's Tune
| e- Beam Energy () | 10 MeV |
| Solenoid 1 | 7.2 A |
| Solenoid 2 | 2.9 A |
| Gun Hor | 0 A |
| Gun Ver | 0 A |
| Output Hor | -0.2 A |
| Output Ver | 0.3 A |
| Gun HV | 10.00 (Knob Setting) |
| Gun Grid Voltage | 10.00 (Knob Setting) |
| RF frequency | 2856.373 MHz |
| Modulator HV Power Supply | 4.20 (Knob Setting) |
| RF macro Pulse Length (FWHM) | 300 ns |
| Q1 (A) | 0 |
| Q2 (A) | 0 |
| Q3 (A) | 0 |
| Q4 (A) | 0 |
| Q5 (A) | 0 |
| Q6 (A) | 0 |
| Peak Current on FC | 73.2 mAmps |
| Scope on FC | 200 px |
| Beam Spot | 200 px |
4-5 MeV Setting
Energy switch changed to low energy setting. Part of the cavity is grounded.
| Energy Switch | In (Part of the cavity is grounded, HRRL low energy operation mode ) |
| e- Beam Energy () | 4-5 MeV |
| Solenoid 1 | 7.2 A |
| Solenoid 2 | 2.9 A |
| Gun Hor | 0 A |
| Gun Ver | 0 A |
| Output Hor | -0.2 A |
| Output Ver | 0.3 A |
| Gun HV | 10.00 (Knob Setting) |
| Gun Grid Voltage | 10.00 (Knob Setting) |
| RF frequency | 2856.373 MHz |
| Modulator HV Power Supply | 4.00 (Knob Setting) |
| RF macro Pulse Length (FWHM) | 300 ns |
| Q1 (A) | 0 |
| Q2 (A) | 0 |
| Q3 (A) | 0 |
| Q4 (A) | 0 |
| Q5 (A) | 0 |
| Q6 (A) | 0 |
| Peak Current on FC | mAmps |
| Scope on FC | 200 px |
| Beam Spot | 200 px |
Gun has been up to air for 3 times. It could be oxidation, contamination. Or it could be gun died, less likely. Roasting the gun to burn off the contamination is an idea. Chad just roasted gun for with higher current, we saw gun current increased many times. We will leave roasted for one night.