Wastewater Experiment Commissioning Plan

Beam Line Commissioning Plan

UITF Operating Procedure

Wastewater commissioning plan (high level)

RCG monitoring

Gun Test Stand Mode:

1. HV commissioning and processing of the gun
2. Determination of Operating Voltage for a low FE or FE free regime: 180kV with a 20kV/min ramp up rate.

keV mode: (VBVM101 locked in)

1. Insert Faraday cups 1 & 2.
2. Verify manual valves VMVK203 and VMVK401 are open; open them if they are closed and vacuum is reasonable on both sides of the valve.
3. Using the laser amplifier, configure it to create a low current CW beam of ~10nA
4. Systematically insert all of the Viewers in the keV region. Verify they all insert, retract, and are focused and the the lights work. File PR if problem arises.
5. Open and close each valve in the keV region and makes sure it hits its limit switch on both sides. Leave all valves opened when completed. File PR if problem arises.
6. Verify all vacuum pumps in the keV region are on and at reasonable voltages/currents. File PR if problem arises.
7. Turn on gun to operating voltage.
8. Insert ITVK201
9. We are going to test the newly installed target encoder interlock. Contact the Accelerator DSO (Harry Fanning [x7619 / fanning@jlab.org]) to observe the test:
   • Set the laser to emit 'Viewer Limited' beam
   • Adjust the target ladder to move to a new position
   • Did the laser trip to 'Beam Synch'?
     1. Yes - Great! Record the results of the test in the UITFLog
     2. No - Curses! Contact Gary Croke [x5097/gcroke@jlab.org] for help troubleshooting the interlock. You may proceed with the below keV testing which work occurs if it is opportunistic, but no beam is authorized through the Booster until this is corrected, tested, and the result has been recorded by the DSO.
10. In parallel with the above test (or separately with another operator) the calibration of target positions on the rail may be executed by Scott Windham [x7324 / windham@jlab.org] / Weiwei Lu. [x7476 / weiwei@jlab.org]
11. MBHK101H & V, MBHK102H & V, and MFHK101 were all disconnected this down
    • Verify the MBHK101H & V correctors kick in the appropriate dimension and with the appropriate sign. File PR if problem arises.
    • Verify the MBHK102H & V correctors kick in the appropriate dimension and with the appropriate sign. File PR if problem arises.
    • Use MFHK101 to determine the magnetic field which approximately focus beam on the viewer; use correctors as necessary to keep beam on the viewer.
    • Using the ditherer, dither the solenoid by 10% and use the K101 corrector pair to center beam in the solenoid (i.e. where there is no horizontal/vertical displacement as the field changes)
    • Use the K102 corrector pair to center beam on the viewer.
12. Continue to set up keV beam to FC#1 per normal operating procedure.
13. Execute UITFList #### with Scott Windham and Weiwei Lu to map the Chopper Slit Encoder (Encoder motor was changed over the down)
14. Once mapped, withdraw the chopper slit (it will not be used for this experiment)
15. Continue beam setup to FC#2 per procedure
16. Establish beam to the keV spectrometer
    • Configure the laser to be able to generate Tune mode beam.
    • Take a harp scan
    • Calculate the beam energy based on the field and check that this matches what the gun voltage reports
    • Perform an emittance measurement using the K501 wire scanner
    • Perform an emittance measurement using the K501 viewer
    • Calculate beam emittance and twiss parameters per procedure and match beam to MFQK403
17. Configure ~10nA CW beam to ITVK501. Set MDIK402 to zero BdL. Stop beam. Did the BLM ILMM402 trip? If not, contact SSG for help with configuring the right voltage/trip point.
18. Is beam visible on the BPMs with 100nA of CW current to FC2? If not, file a PR on the relevant BPMs.
19. Cycle all the keV correctors, solenoids, and diples and verify the beam setup is reproducible.
20. Take an all-save if you haven't already. Record your progress in the logbook.
21. When all exercises have been completed to FC2 (and with facility manager permission), take an access and remove the configuration locks from VBVM101 and the booster RF zone.

MeV mode to FC3:

1. Ensure FC3 and FC4 are inserted
2. Systematically insert all of the Viewers in the MeV region. Verify they all insert, retract, and are focused and the the lights work. File PR if problem arises.
3. Open and close each valve in the MeV region and makes sure it hits its limit switch on both sides. Leave all valves opened when completed. File PR if problem arises.
4. Execute UITFList #### with Jim Kortze to test the closure of VFVM401
5. Verify manual valves VMVM301 and VMVM401 are open; open them if they are closed and vacuum is reasonable on both sides of the valve.
6. Verify all vacuum pumps in the keV region are on and at reasonable voltages/currents. File PR if problem arises.
7. Turn on the booster at the desired operating gradients for each cavity.
8. Establish 10nA CW beam to FC3 per procedure.
9. Establish beam to FC3. Does the I-to-V return the same current as measured in an earlier Faraday cup? If not, contact EES-IC a calibration of the device may be required.
10. Insert IYGM501 (YAG) and establish beam. The viewer was moved and reinstalled this down. Camera alignment must be verified. The screen inserts from the Y+ direction.
11. Using MHBK403H/V make horizontal and vertical kicks while observing beam on IYGM501. Does the camera behave as expected? If no - file a PR.
12. The MLHM401H & V correctors were disconnected & repositioned this down. Verify on the YAG the MLHM401H & V correctors kick in the appropriate dimension and with the appropriate sign. File PR if problem arises.
13. Contact RCG and inform them you are ready to proceed with UITFList #### Local shielding verification and monitoring of FC3
14. In parallel, contact EES-IC and inform them you are ready to proceed with UITFList #### SBCM401 BCM Current clam#*# p checkout/verification
15. Establish 100nA CW current to FC3 with RCG present
16. Proceed with the study for EES-IC while RCG is monitoring.PMM201
17. Did all BPMs up to IPMM201 report beam? PR those which did not.

MeV mode to the MeV Spectrometer:

1. Configure the current clamp for I<15nA delivery
2. Make sure MDLM504 is set to 0 BdL and cycled
3. Ensure MDLM601 is set to a field appropriate to the delivered beam energy (formula on white board)
4. Insert ITVM501
5. Withdraw FC3
6. Establish beam to ITVM501 per procedure.
7. MBHM501H & V were disconnected this down.
   • Verify on ITVM501 the MBHM501H & V correctors kick in the appropriate dimension and with the appropriate sign. File PR if problem arises.
8. Establish beam to IDLM703 per procedure. Optimize beam here before delivering down stream.
9. Did all BPMs up to IDLM703 report beam? PR those which did not.
10. Perform a harp scan with IHAM703 and log it.
11. Performs optics qualification activities to this destination
    • Emittance measurements
      1. qsUtility
      2. Viewer-based
    • Energy Measurement

MeV mode to Wastewater Line:

General Note: After any fault or interruption in sending beam, return beam to FC4 and verify it's presence and position with either the viewer or BPM before pulling the cup to run to the thin foil/wastewater targets.

1. When optical qualification of beam has been completed, set MDLM601 to zero and cycle it.
2. Ensure FC#4 is inserted
3. Move the target ladder to the solid block / dump position.
4. Configure the current clamp for I<15nA delivery
5. Verify downstream valves are open.
6. Insert ITVM601. Send 10nA CW beam there and center it on the viewer.
7. MBHM601AH & V and MLHM601BH & V were disconnected this down.
   • Verify on ITVM601 the MBHM601AH & V correctors kick in the appropriate dimension and with the appropriate sign. File PR if problem arises.
   • Verify on ITVM601 the MLHM601BH & V correctors kick in the appropriate dimension and with the appropriate sign. File PR if problem arises.
   • Use these two corrector pairs to center beam on ITVM601.

First diagnostic cross

1. Withdraw ITVM601 and insert IYGM603.
2. Ensure the solenoid is at 0 BdL and on-loop / cycled
3. Send 10nA CW beam there and center it on the viewer with the 601BH/V correctors.
4. Verify the appropriate insertion direction of the camera (from above / +y) and make magnetic kicks (without using the 602A/B correctors) in the horizontal and vertical dimensions to ensure appropriate camera alignment. File a PR if the camera is mis-aligned.
5. MBHM602AH & V and MBHM602BH & V are newly installed.
   • Verify on IYGM603 the MBHM602AH & V correctors kick in the appropriate dimension and with the appropriate sign. File PR if problem arises.
   • Verify on IYGM603 the MBHM602BH & V correctors kick in the appropriate dimension and with the appropriate sign. File PR if problem arises.
6. If beam is very diffuse on IYGM603 use to solenoid to focus it as necessary.

Second diagnostic cross

1. Withdraw IYGM603 and insert IYGM604
2. Verify the appropriate insertion direction of the camera (from above / +y) and make magnetic kicks (without using the 603 correctors) in the horizontal and vertical dimensions to ensure appropriate camera alignment. File a PR if the camera is mis-aligned.
3. MBHM603H & V are newly installed.
   • Verify on IYGM604 the MBHM603H & V correctors kick in the appropriate dimension and with the appropriate sign. File PR if problem arises.
4. Use the solenoid to focus beam on IYGM704
5. Withdraw IYGM704
6. Establish beam to FC4. Does the I-to-V return the same current as measured in an earlier Faraday cup? If not, contact EES-IC a calibration of the device may be required.
7. Connect to the ITVM604A camera. Can you clearly see the target mechanism and view screen? If not, file a problem report.
8. Adjust the target to each of its 5 positions. Do the stops correspond with sensible positions as seen on the camera (i.e. the target is in line with the exit window). If not, file a PR.
9. An interlock has been put in to drop the laser mode to Beam synch with the target cells in motion. It is desirable we test the functionality of the interlock. Start a running logbook entry for this exercise. Establish beam to FC#4 and adjust the target ladder from the dump position (position 1) to target position 2. Did beam stop, note yes or no. Repeat the exercise from 2 >3, 3 >4, 4 > 5, 5>1, and 1>5. File a PR if beam was not stopped in any instance.

If there are any open PRs at this point, stop and correct the issues with EES and the Facility manager before beginning the experimental program studies.

1. BLM Testing
2. BPM Testing

Following beam commissioning, operations may continue through the normal operating procedure. Sample irradiation for the Wastewater experiment will be governed by the Dose mapping & Irradiation procedure