Difference between revisions of "G2p optics"

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==Summary of Optics Plan==
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==Run Plan==
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*[[Summary of g2p Optics Plan]]
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'''Define the following jobs:'''
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''' A. Acceptance calibration, sieve out, rasters on and off (large C12, no LHe)'''
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''' B. Delta scan, (sieve in, C12, no LHe) '''
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''' C. Beam position scan (Sieve in, large C12, no LHe, 8 points on x,y axis and 4 additional points at corner) '''
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''' D. Pointing (Sieve in, CH2, need to refill LHe)'''
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===1. 0T @ 2.257:===
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Do A, move sieve in, do B and C(12 points), refill LHe do D.
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At the end take elastic NH3 data to check NH3 thickness.
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When finish: move sieve out; Ramp field up to 2.5T; Drain LHe
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===2. 2.5T, 90deg @ 2.257:===
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Do A, move sieve in, do B and C(12 points), refill LHe do D.
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When finish: Ramp field up to 2.5T; Drain LHe out
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===3. 5.01T, 6deg @ 2.257:===
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Do B and C(8 points), refill LHe do D.
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===4. 2.5T, 90deg @ 1.706:===
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Do A, move sieve in, do B and C(8 points), refill LHe do D.
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When finish: Rotate target field to 6 deg; Ramp up to 5.01T; Darin LHe out
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===5. 5.01T, 6deg @ 1.706 GeV:===
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'''Here is the optics plan for gep at 1.706 GeV:
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'''P0=1.691
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Sieve IN:
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target  config                  number of events or beam  time
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C12    Sieve IN, No rasters      2 x 1M (10 minutes)
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C12    Sieve IN, Both rasters    2 x 1M (10 min)
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NH3    Sieve IN, Both rasters    3 x 7M (about 1 hours, which will give
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                                  about 400 events when cut to 1x1 beam size)
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**Escorted access to move sieve out (30 min)
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C12    Sieve out, both rasters  30 minutes(about 10 M events for each
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                                  arm, good for dilution) 
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In total 2.5 ABU, 3 hours were allocated.
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===6. 5.01T, 90deg @ 2.257:===
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Do A, move sieve in, do B and C(8 points), refill LHe do D.
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When finish: Turn off target field; Drain LHe, move sieve out.
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===7. 5T 0deg @ 2.254 GeV:===
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Here is the optics plan for 2.254GeV with 5T and 0 deg target field.
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Before doing optics, beam center and slow raster size have to be determined.
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No LHe, LHRS starts at 0% and right HRS start at 4%:
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1. Delta scan:  C12, sieve in , no raster  (3 hours)
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Left HRS: -4%, -3%, -2%, -1%, 0%, 1%, 2%, 3%, 4%
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Right HRS: 4% (Right septum I<=920A, so can only go to 4%.)
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(-4%, -1% and +3% can be ignored if running out of time)
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NOTE: if possible, do 3% for right arm, which is 930A.
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**Ramp left dipoles back to 0% when finish. (10 minutes)
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2. Beam position scan: C12, delta=0; sieve in, slow raster only,  (40 minutes)
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Config the slow raster to jump in the following way:
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1)between (x=-5, y=-5) and (5,5)
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2)between x=0, y=+/-5
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3)between x=+/-5, y=0
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3. Acceptance calibration, part 1:  C12, sieve in, delta=0  (10 minutes)
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1) both rasters on
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4. Pointing: CH2, sieve in ,delta=0, no rasters (30 minutes)
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Take data till the H peak of a normal sieve hole can be fit.
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**Escorted access to move sieve out when finish (30 minutes)
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5. Acceptance calibration, part2:  C12, sieve out, delta=0 (20 minutes)
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1) no rasters
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2) both rasters
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Estimated time: 6 hours
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At the end of the optics, refill LHe, change to the 1st production point,
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start dilution runs then polarize NH3 target.
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===8. 2.5T, 90deg @ 1.159:===
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'''Do A, move sieve in, do B and C(8 points), refill LHe do D.
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'''When finish: Ramp field up to 5.01T; Drain LHe out
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Here is the optics plan for 1.1GeV with 2.5T at 90 degrees target field.
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Before doing optics, beam center and slow raster size have to be determined.
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No LHe, LHRS starts at -4% and right HRS start at -3.5%:
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1. Delta scan:  C12, sieve in , no raster  (4 hours)
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Left HRS: -4%, -3%, -2%, -1%, 0%, 1%, 2%, 3%, 4%
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Right HRS: -3.5% -2%, 0%, 2%, 3.5%
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NOTE: if running out of time, we will skip 3.5% in right arm
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and 1%, 3% at left arm.  This can save about 1 hours.
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**Ramp dipoles back to 0% when finish. (40 minutes)
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2. Beam position scan: C12, delta=0; sieve in, slow raster only,  (40 minutes)
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Config the slow raster to jump in the following way:
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1)between (x=-5, y=-5) and (5,5)
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2)between x=0, y=+/-5
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3)between x=+/-5, y=0
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3. Acceptance calibration, part 1:  C12, sieve in, delta=0  (10 minutes)
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1) both rasters on
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4. Pointing: CH2, sieve in ,delta=0, no rasters (30 minutes)
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Take data till the H peak of a normal sieve hole can be fit.
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**Escorted access to move sieve out when finish (30 minutes)
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5. Acceptance calibration, part2:  C12, sieve out, delta=0 (20 minutes)
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1) no rasters
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2) both rasters
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Estimated time: 7 hours
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At the end of the optics, refill LHe, change to the 1st production point,
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start dilution runs then polarize NH3 target.
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===9.  5.01T, 6deg @ 1.159:===
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'''Here is the optics plan for gep at 1.15765 GeV beam energy:
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'''P0=1.1571
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'''T1_rate=5kHz on 40-mil-C12 target, with 50 nA 1.15765 GeV beam, sieve in, No LHe
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Sieve IN,
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If rasters are used, the fast raster is 2x2 and slow raster is 2 cm (or same as production runs):
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target  configuration          number of events or beam time
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C12    Sieve IN, No rasters      2 x 1M (10 minutes)
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C12    Sieve IN, Both rasters    2 x 1M (10 minutes)
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NH3    Sieve IN, Both rasters    3 x 7M (about 70 minutes, which will give
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                                  about 400 events when cut to 1x1 beam size)
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**Escorted access to move sieve out (30 min)
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C12    Sieve out, both rasters  30 minutes(about 10 M events for each
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                                  arm, good for dilution) 
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'''Estimated time= 3 hours.
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==links==
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*[http://hallaweb.jlab.org/experiment/g2p/collaborators/jixie/20120226_Optics_Final/g2p_optics_plan.pdf Overall G2P|GEP optics plan]
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*[http://hallaweb.jlab.org/experiment/g2p/collaborators/jixie/20120226_Optics_Final/2.253GeV_0T_optics_runplan.pdf 2.253GeV_0T_optics_runplan]
 
*[http://hallaweb.jlab.org/experiment/g2p/collaborators/jixie/20120226_Optics_Final/2.253GeV_0T_optics_runplan.pdf 2.253GeV_0T_optics_runplan]
 
*[http://hallaweb.jlab.org/experiment/g2p/collaborators/jixie/20120226_Optics_Final/2.253GeV_2.5T_90deg_optics_runplan.pdf 2.253GeV_2.5T_90deg_optics_runplan]
 
*[http://hallaweb.jlab.org/experiment/g2p/collaborators/jixie/20120226_Optics_Final/2.253GeV_2.5T_90deg_optics_runplan.pdf 2.253GeV_2.5T_90deg_optics_runplan]
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*[http://hallaweb.jlab.org/experiment/g2p/collaborators/jixie/20120226_Optics_Final/2.253GeV_5.0T_6deg_optics_runplan.pdf 2.253GeV_5.0T_6deg_optics_runplan]
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*[http://hallaweb.jlab.org/experiment/g2p/collaborators/jixie/20120226_Optics_Final/2.253GeV_2.5T_90deg_optics_runplan_newRseptum.pdf 2.253GeV_2.5T_90deg_optics_runplan (403216)]
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*[http://hallaweb.jlab.org/experiment/g2p/collaborators/jixie/20120226_Optics_Final/1.706GeV_2.5T_90deg_optics_runplan.pdf 1.706GeV_2.5T_90deg_optics_runplan]
 
*[http://hallaweb.jlab.org/experiment/g2p/collaborators/jixie/20120226_Optics_Final/1.706GeV_2.5T_90deg_optics_runplan.pdf 1.706GeV_2.5T_90deg_optics_runplan]
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*[http://hallaweb.jlab.org/experiment/g2p/collaborators/jixie/20120226_Optics_Final/1.706GeV_5.0T_6deg_optics_runplan.pdf 1.706GeV_5.0T_6deg_optics_runplan]
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*[http://hallaweb.jlab.org/experiment/g2p/collaborators/jixie/20120226_Optics_Final/2.253GeV_2.5T_90deg_optics_runplan.pdf 1.159GeV_2.5T_90deg_optics_runplan]
  
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''[http://hallaweb.jlab.org/experiment/g2p/collaborators/jixie/20120226_Optics_Final more_details...]
  
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*[http://hallaweb.jlab.org/experiment/g2p/collaborators/jixie/20120226_Optics_Final/2.253GeV_2.5T_90deg_optics_runplan.pdf 1.159GeV_2.5T_90deg_optics_runplan]
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==Run List==
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*[http://hallaweb.jlab.org/experiment/g2p/collaborators/chao/optics/OpticsSummary.pdf Optics run list summary]
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*[http://hallaweb.jlab.org/experiment/g2p/collaborators/chao/optics/OpticsRunTable.xlsx Optics run list (details)]
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*[http://hallaweb.jlab.org/experiment/g2p/collaborators/chao/optics/list.dat Optics run list (run #)]
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==Calibration Results==
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*[[LHRS 2.254GeV 2.5T Transverse 484816]]
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*[[LHRS 2.254GeV 2.5T Transverse 403216]]
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*[[LHRS 1.706GeV 2.5T Transverse 400016]]
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*[[LHRS 1.158GeV 2.5T Transverse 400016]]
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*[[LHRS 2.254GeV 5.0T Longitudinal 400016]]
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*[[RHRS 2.254GeV 2.5T Transverse 484816]]
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*[[RHRS 2.254GeV 2.5T Transverse 403216]]
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*[[RHRS 1.706GeV 2.5T Transverse 400016]]
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*[[RHRS 1.158GeV 2.5T Transverse 400016]]
  
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'''With new right septum
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==Links==
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*[http://hallaweb.jlab.org/experiment/g2p/collaborators/jixie/20120226_Optics_Final/2.253GeV_2.5T_90deg_optics_runplan_newRseptum.pdf 2.253GeV_2.5T_90deg_optics_runplan_new_right_septum]
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Target field mapping:
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*[http://hallaweb.jlab.org/experiment/g2p/collaborators/chao/technotes/Chao_TechNote_TargetField.pdf Results]
  
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Suggestions of the run plan:  
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For commissioning:  
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*[https://hallaweb.jlab.org/wiki/index.php/G2p_optics_procedure Procedure suggested by Vince]
 
*[https://hallaweb.jlab.org/wiki/index.php/G2p_optics_procedure Procedure suggested by Vince]
 
*[https://hallaweb.jlab.org/wiki/index.php/G2p_other_optics_plan Procedure suggested by Jin]
 
*[https://hallaweb.jlab.org/wiki/index.php/G2p_other_optics_plan Procedure suggested by Jin]

Latest revision as of 08:35, 17 February 2016

Run Plan

more_details...

Run List

Calibration Results

Links

Target field mapping:

Suggestions of the run plan:

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