Difference between revisions of "Beam Text May 17 2012"
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=== En Scan=== | === En Scan=== | ||
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Dipole FC | Dipole FC | ||
Coil Current | Coil Current | ||
Revision as of 19:43, 17 May 2012
Preparation
0. MATLAB emittance analysis: (working?) -- yes
1. Magnets: --Working
2. Camera: (a)--Working, (b)--shielding-good,(c) Sync? -- good
3. Flags: --Working
4. Farady Cup: hocked up? --yes
5. Blank off for camera on? --good
6. Gas bottle for valve full? --Yes
7. Gas bottle for flags full? --Yes
8. 3 Pickup Coils (Green Torroids): (1)@gun: hocked-up; (2)@accelerator exit: hocked-up to 2 red strip wire. Now connected to linac monitor panel which labeled as "J12 from back", "Scan field Mon" from front. (3)@end of beamline:
Start List
1) Valve exit of cavity opened?
2) Faraday cups are hocked up?
3) Target in?
4) Start the camera? Turn light on and off, observe if camera working. Load run script from "C:\Documents and Settings\sadiq\My Documents\26Apr2012\Camera_Settings".
Camera triggering issue
1. camera is triggered by something?
2. When camera trig is plugged into pulse generator, pulse generator set to trigger externally, but no external trigger connected to pulse generator, and Klystron HV is on, camera triggers.
3. Is camera being triggered by the noise created by the Klystron HV?
4. We have camera grounding issue.
can not bend the beam
Wrong polarity on the dipole. To switch the polarity on the dipole, we need turn on the power supply for the relays.
Energy Scan at 15 esh MeV
1. Tuning
| Energy Switch | Out (High En Range) |
| Dipole Coil Current | |
| e- Beam Energy () | MeV (mapping ) |
| Solenoid 1 | 12.9 A |
| Solenoid 2 | 13.7 A |
| Gun Hor | 0.1 A |
| Gun Ver | 0.2 A |
| Output Hor | -0.4 A |
| Output Ver | 0.0 A |
| Rep Rate | 63 |
| Gun HV | 8.97(Knob Setting) |
| Gun Grid Voltage | 10 (Knob Setting) |
| RF frequency | 2856.291 MHz |
| Modulator HV Power Supply | 4.84 (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 |
| Peak Current on FC 1 (45 deg) | 114 mAmps 400 px |
| Peak Current on FC 2 (45 deg) | mAmps |
| Scope on FC 1 | 200 px |
| Scope on FC 2 | 200 px |
| Beam Spot | 200 px |
En Scan
Dipole FC Coil Current Current Reading (A) (mA) 27 1.264 28 1.596 29 2.336 30 3.7 30.5 4.18 31 4.7 31.5 7.26 32 8.56
Quad Scanning for Emittance
En Scan at 15.6004336 MeV. Q1 is on, All other quads are off. 88.8 mAmp Peak Current.
1) Scan from -10 Amps to 10 Amps
2) Increment at 0.4 Amps.
3) Name images by numbers start from 1. Then go on.
Like: -10 Amp is 1, -9.6 Amp is 2, and so on til 10 Amp is named 51.
4) Scan multipole (10) times from -10 to 10 Amps, and put them in different folders.
5) For each time, take back ground images. It should be done when RF is on and gun is off.
6) After the scan take a scope image for the current of the FC after the OTR screen.
Scan with Q1
After scan, put the files Run "Emit_Calc_N10toP10_Q1" under "C:\Documents and Settings\sadiq\My Documents\MATLAB\Emit_Calc\15MeV\Q1" directory.
Scan with Q6
After scan, put the files Run "Emit_Calc_N10toP10_Q6" under "C:\Documents and Settings\sadiq\My Documents\MATLAB\Emit_Calc\15MeV\Q1" directory.
Dipole Scanning for Energy Measurement
Energy Scan at Low Energy
1. Tuning
Energy switch is in, linac operates at low energy
| Energy Switch | Out (High En Range) |
| Dipole Coil Current | |
| e- Beam Energy () | MeV (mapping ) |
| Solenoid 1 | 12.1 A |
| Solenoid 2 | 9.6 A |
| Gun Hor | + 0.3 A |
| Gun Ver | 0 A |
| Output Hor | + 0.6 A |
| Output Ver | + 0.3 A |
| Rep Rate | 63 |
| Gun HV | 8.99(Knob Setting) |
| Gun Grid Voltage | 10 (Knob Setting) |
| RF frequency | 2856.388 MHz |
| Modulator HV Power Supply | 4.185 (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 |
| Peak Current on FC 1 (45 deg) | 88.8 mAmps |
| Peak Current on FC 2 (45 deg) | 26.4 mAmps |
| Scope on FC 1 | 99.2 mA 200 px |
| Scope on FC 2 | 200 px |
| Beam Spot | 200 px |
Energy Scan
12 1.912
Quad Scanning for Emittance
En Scan at 15.6004336 MeV. Q1 is on, All other quads are off. 88.8 mAmp Peak Current.
1) Scan from -10 Amps to 10 Amps
2) Increment at 0.4 Amps.
3) Name images by numbers start from 1. Then go on.
Like: -10 Amp is 1, -9.6 Amp is 2, and so on til 10 Amp is named 51.
4) Scan multipole (10) times from -10 to 10 Amps, and put them in different folders.
5) For each time, take back ground images. It should be done when RF is on and gun is off.
6) After the scan take a scope image for the current of the FC after the OTR screen.