Difference between revisions of "Tune Electron Beam"
From Hall D Ops Wiki
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* Prerequisites: | * Prerequisites: | ||
# Tagger microscope (TAGM) and all the crates with electronics should be removed from Hall D. | # Tagger microscope (TAGM) and all the crates with electronics should be removed from Hall D. | ||
| − | #* Responsibility: Hall D technical staff/ Tom Carstens < | + | #* Responsibility: Hall D technical staff/ Tom Carstens <math>\Box</math>) |
# Goniometer in the beam-open position. The goniometer will not be used during the 2014 run | # Goniometer in the beam-open position. The goniometer will not be used during the 2014 run | ||
# Amorphous radiator ladder equipped (HAPR included) and operational | # Amorphous radiator ladder equipped (HAPR included) and operational | ||
Revision as of 09:15, 14 August 2014
Contents
Main Page
Tune Electron Beam (Time estimate: 15 days)
- 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:
- Sept 19 - Sept 29: Tune beam to Hall D line dumplette (Tagger Hall can remain open).
- Sept 29 - Oct 3 2014: Tune beam to Tagger Hall D (Tagger Hall and Hall D must be closed).
- Prerequisites:
- Tagger microscope (TAGM) and all the crates with electronics should be removed from Hall D.
- Responsibility: Hall D technical staff/ Tom Carstens
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- Responsibility: Hall D technical staff/ Tom Carstens
- Goniometer in the beam-open position. The goniometer will not be used during the 2014 run
- Amorphous radiator ladder equipped (HAPR included) and operational
- Beam lines under vacuum
- Tagger magnet operational
- Shielding walls installed
- Radiation monitors installed and operational
- Primary collimator block in the position between two holes, shielding the central area of the beam pipe. Secondary collimator removed.
- Profiler counter installed in front of the collimator
- 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
- Hall D quadrupole magnet MQPAD00 turned off
- Hall D/Tagger Hall locked
- No shift workers in Hall D; experts from Hall D are involved with the radiation measurements
- Activities:
- Tune the pulsed beam to the dump, check the beam specifications, send the CW beam (accelerator).
- Check radiation levels in the tagger hall (Hall D/RadCon).
- Check for photons (with the Profiler and Active Collimator) and radiation levels in the collimator cave (Hall D/RadCon).
- Responsibility: Main: Accelerator; support: HallD, RadCon.
