Difference between revisions of "Tune Electron Beam"
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| − | + | * 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 |
| − | = | + | * [http://opsweb.acc.jlab.org/CSUEApps/atlis/task/14423 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). |
| − | = | + | # 3 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. <span style="font-size:21px">☑</span> | ||
| + | # Goniometer in the beam-open position. The goniometer will not be used during the 2014 run. <span style="font-size:21px">☑</span> | ||
| + | # Amorphous radiator ladder equipped and operational <span style="font-size:21px">☑</span> | ||
| + | #* Responsibility: Hovanes Egiyan. | ||
| + | # Beam lines under vacuum <span style="font-size:21px">☑</span> | ||
| + | # Tagger magnet operational <span style="font-size:21px">☑</span> | ||
| + | #* Responsibility: MCC | ||
| + | # Shielding walls installed <span style="font-size:21px">☑</span> | ||
| + | # Radiation monitors installed and operational <span style="font-size:21px">☑</span> | ||
| + | #* Responsibility: Alexandre Deur (CARMS)/Hovanes Egyian (halo counters) | ||
| + | #* [https://hdops.jlab.org/wiki/index.php/How_to_read_temporary_CARMS Procedure to monitor CARMs] | ||
| + | # Upstream Profiler installed in front of the collimator <span style="font-size:21px">☑</span> | ||
| + | # Downstream Profiler installed in front of photon beam dump <span style="font-size:21px">☑</span> | ||
| + | |||
| + | * Conditions: | ||
| + | # Pulsed beam [https://halldweb1.jlab.org/wiki/index.php/Tune_mode 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 | ||
| + | # Primary collimator block in the position between two holes, shielding the central area of the beam pipe <span style="font-size:21px">☑</span>. Secondary collimator removed. <span style="font-size:21px">☑</span> | ||
| + | #* Responsibility: Hovanes Egiyan. | ||
| + | #* [[Beam_Line_Detectors_Shift#Move_Collimator | Procedure for moving Primary Collimator]] | ||
| + | # Vacuum window covers removed (7 window covers) <span style="font-size:21px">☑</span> | ||
| + | # No radiator inserted. <span style="font-size:21px">☑</span> | ||
| + | #* Responsibility: Hovanes Egiyan. | ||
| + | #* [[Tagging_Spectrometer_Shift#Move_Amorphous_Radiator | Procedure for inserting/removing amorphous radiators]] | ||
| + | # No shift workers in Hall D except if needed. RC and/or other Hall D personnel follows the beam tuning procedure at the MCC. | ||
| + | |||
| + | [https://hdops.jlab.org/wiki/index.php/Fall_2014_Commissioning_Plan Back to main Fall14 commissioning page] | ||
Latest revision as of 10:58, 22 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).
- 3 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
- Upstream Profiler installed in front of the collimator ☑
- Downstream Profiler 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
- 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
- Vacuum window covers removed (7 window covers) ☑
- No radiator inserted. ☑
- Responsibility: Hovanes Egiyan.
- Procedure for inserting/removing amorphous radiators
- No shift workers in Hall D except if needed. RC and/or other Hall D personnel follows the beam tuning procedure at the MCC.
