Difference between revisions of "Tune Electron Beam"
From Hall D Ops Wiki
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# Primary collimator block in the position between two holes, shielding the central area of the beam pipe <math>\Box</math>. Secondary collimator removed. <span style="font-size:21px">☑</span> | # Primary collimator block in the position between two holes, shielding the central area of the beam pipe <math>\Box</math>. Secondary collimator removed. <span style="font-size:21px">☑</span> | ||
#* Responsibility: Hovanes Egiyan. | #* Responsibility: Hovanes Egiyan. | ||
| − | #* <span style="color:#ff00ff"> | + | #* [https://hdops.jlab.org/wiki/index.php/Slow_Controls_Shift Procedure for moving Primary Collimator] <span style="color:#ff00ff">Specific procedure </span> |
# First Profiler counter installed in front of the collimator <math>\Box</math> | # First Profiler counter installed in front of the collimator <math>\Box</math> | ||
# Second Profiler counter installed in front of photon beam dump <math>\Box</math> | # Second Profiler counter installed in front of photon beam dump <math>\Box</math> | ||
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# No radiator inserted. <math>\Box</math> | # No radiator inserted. <math>\Box</math> | ||
#* Responsibility: Hovanes Egiyan. | #* Responsibility: Hovanes Egiyan. | ||
| − | #* <span style="color:#ff00ff"> | + | #* [https://hdops.jlab.org/wiki/index.php/Slow_Controls_Shift Procedure for inserting/removing amorphous radiators] <span style="color:#ff00ff">Specific procedure </span> |
# Hall D controlled quadrupole MQPAD00 turned off. <math>\Box</math> | # Hall D controlled quadrupole MQPAD00 turned off. <math>\Box</math> | ||
#* Responsibility: MCC | #* Responsibility: MCC | ||
Revision as of 07:17, 16 October 2014
- Goal: provide a clean electron beam through the center of the beam aperture to the beam dump in the tagger hall with acceptable radiation levels.
- Priority: High
- Link to the accelerator test plan for electron beam commissioning (ATLIS)
- Expected duration:
- 4 days: Tune beam to Hall D line dumplette (Tagger Hall can remain open).
- 10 days: Tune beam to Tagger Hall D (Tagger Hall and Hall D must be closed).
- Prerequisites:
- Tagger microscope (TAGM) and all the crates with electronics removed from Hall D.
- Goniometer in the beam-open position. The goniometer will not be used during the 2014 run. ☑
- Amorphous radiator ladder equipped and operational
- Responsibility: Hovanes Egiyan.
- Beam lines under vacuum
- Tagger magnet operational
- Responsibility: MCC
- Shielding walls installed
- Radiation monitors installed and operational
- Responsibility: Alexandre Deur (CARMS)/Hovanes Egyian (halo counters)
- Procedure to monitor CARMs Specific procedure
- Primary collimator block in the position between two holes, shielding the central area of the beam pipe . Secondary collimator removed. ☑
- Responsibility: Hovanes Egiyan.
- Procedure for moving Primary Collimator Specific procedure
- First Profiler counter installed in front of the collimator
- Second Profiler counter installed in front of photon beam dump
- Conditions:
- Pulsed beam pulsed beam 4-10 µA (average 60-150 nA) for the beam tune
- CW beam 50-100 nA at the final stage of the procedure
- No radiator inserted.
- Responsibility: Hovanes Egiyan.
- Procedure for inserting/removing amorphous radiators Specific procedure
- Hall D controlled quadrupole MQPAD00 turned off.
- Responsibility: MCC
- No shift workers in Hall D except for Shift leader if needed and experts from Hall D are involved with the radiation measurements. RC and/or other Hall D personnel follows the beam tuning procedure at the MCC.
