Difference between revisions of "G2p optics"

Revision as of 14:33, 22 March 2012

Summary of Optics Plan

Define the following jobs:
 A. Acceptance calibration, sieve out, rasters on and off (large C12, no LHe) 
 B. Delta scan, (sieve in, C12, no LHe) 
 C. Beam position scan (Sieve in, large C12, no LHe, 8 points on x,y axis and 4 additional points at corner) 
 D. Pointing (Sieve in, CH2, need to refill LHe)

1. 0T @ 2.257:

Do A, move sieve in, do B and C(12 points), refill LHe do D.
At the end take elastic NH3 data to check NH3 thickness.
When finish: move sieve out; Ramp field up to 2.5T; Drain LHe

2. 2.5T, 90deg @ 2.257:

Do A, move sieve in, do B and C(12 points), refill LHe do D.
When finish: Ramp field up to 2.5T; Drain LHe out

3. 5.01T, 6deg @ 2.257:

Do B and C(8 points), refill LHe do D. 

4. 2.5T, 90deg @ 1.706:

Do A, move sieve in, do B and C(8 points), refill LHe do D.
When finish: Rotate target field to 6 deg; Ramp up to 5.01T; Darin LHe out

5. 5.01T, 6deg @ 1.706:

Do B and C(8 points), refill LHe do D
When finish: Move sieve out; Rotate target field to 90 deg; Ramp up to 5.01T; Drain LHe out

6. 5.01T, 90deg @ 2.257:

Do A, move sieve in, do B and C(8 points), refill LHe do D.
When finish: Turn off target field; Drain LHe, move sieve out.

7. 0T @ 1.159:

Do A, move sieve in, do B and C(8 points), refill LHe do D.
At the end take elastic NH3 data to check NH3 thickness.
When finish: move sieve out; Ramp field up to 2.5T; Drain LHe out

8. 2.5T, 90deg @ 1.159:

Do A, move sieve in, do B and C(8 points), refill LHe do D.
When finish: Ramp field up to 5.01T; Drain LHe out

9. 5.01T, 6deg @ 1.159:

Do B and C(8 points), refill LHe do D.

• Overall G2P|GEP optics plan
• 2.253GeV_0T_optics_runplan
• 2.253GeV_2.5T_90deg_optics_runplan
• 2.253GeV_5.0T_6deg_optics_runplan

• 2.253GeV_2.5T_90deg_optics_runplan_new_right_septum

For commissioning:

• Procedure suggested by Vince
• Procedure suggested by Jin