Difference between revisions of "Tune Electron Beam"

Revision as of 10:56, 14 August 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:

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).

Tagger microscope (TAGM) and all the crates with electronics removed from Hall D. $\Box$
Goniometer in the beam-open position. The goniometer will not be used during the 2014 run. ☑
Amorphous radiator ladder equipped (HARP included) and operational
- Responsibility: Hovanes Egiyan.
- Procedure for radiator harp scans
Beam lines under vacuum $\Box$
Tagger magnet operational
- Responsibility: MCC
Shielding walls installed $\Box$
Radiation monitors installed and operational
- Responsibility: Alexandre Deur (CARMS)/Hovanes Egyian (halo counters)
- Procedure to monitor CARMs
- Procedure to Halo counters
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
First Profiler counter installed in front of the collimator $\Box$
Second Profiler counter installed in front of photon beam dump $\Box$

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 amorphous radiator
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

@@ Line 38: / Line 38: @@
 #* 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
-* 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.
 ==[[Tune Photon Beam]]==