Hall C One pass commissioning plan

Initial conditions

• HMS/SHMS angle surveys.
• Beamline BPM and Harp surveys. Check offsets in MCC database.
• HMS/SHMS Conditions:

HMS/SHMS collimator:	PION , COLLIMATOR
HMS/SHMS trigger:	SCIN 3/4, SCIN 3/4
HMS angle/momentum	25 deg, -1.6 GeV/c
SHMS angle/momentum	25 deg, -1.6 GeV/c

• Run 2.2 GeV beam four 4 days and switch to 3 pass.
• Run 6.4 GeV beam and switch to 5 pass.
• Run 10.6 GeV beam.

Completed

Center beam on C-hole target

• Experts:
• Expected time: 1 hour
• Goal: Center beam on carbon hole target
• Conditions:

beam current:	5 μA
fast raster:	3x3mm
target:	carbon hole
HMS/SHMS collimator:	PION , COLLIMATOR
HMS/SHMS trigger:	SCIN 3/4, SCIN 3/4
HMS angle/momentum	25 deg, -1.6 GeV/c
SHMS angle/momentum	25 deg, -1.6 GeV/c

• Run plan: Procedure

Initial HMS/SHMS Detector Checkout

• SHMS/HMS optics experts:
• HMS DC experts:
• Expected time: 1 hour
• Goal: Initial checkout of the HMS/SHMS detectors. Working well enough for carbon elastics data and initial checkout of the SHMS/HMS tunes.
• Conditions:

beam current:	5-20 μA
fast raster:	off
target:	0.5% carbon
HMS/SHMS collimator:	PION , COLLIMATOR
HMS/SHMS trigger:	SCIN 3/4,SCIN 3/4
HMS angle/momentum	25 deg, -1.6 GeV/c
SHMS angle/momentum	25 deg, -1.6 GeV/c

• General Run Plan:
• HMS focal plane plots
• SHMS focal plane plots
• HMS physics plots
• SHMS physics plots
• Need to have rough calibration of BCM1 and BCM2.
• First check trigger rates ( SHMS/HMS expects 4kHz/5kHz good electrons at 20uA and )
• Check background triggers rate
• Confirm the HMS DC tracking is working properly and efficiency is high.
• Compare HMS/SHMS focal plane plots to MC simulation.

Wire Chamber

• SHMS Run plan:
• HMS Run plan:

Shower Counter

• SHMS Run plan: files
• HMS Run plan: files

Scintillator

• SHMS Run plan:
• HMS Run plan:

Cerenkov

• SHMS Heavy Gas Cherenkov: Run Plan
• HMS Run plan:

Aerogel

• SHMS Run plan:Files

Initial checkout of SHMS/HMS tune

• Experts: M Jones, H. Szumila
• Expected time: 1 hour
• Goal: Check tune with sieve
• Conditions:

beam current:	5-20 μA
fast raster:	off
target:	0.5% carbon
HMS/SHMS collimator:	SIEVE , CENTERED SIEVE
HMS/SHMS trigger:	SCIN 3/4,SCIN 3/4
HMS angle/momentum	25 deg, -1.6 GeV/c
SHMS angle/momentum	25 deg, -1.6 GeV/c

• Plots of focal plane for HMS focal plane and SHMS focal plane
• For SHMS use these plots to help guide the setting of the quadrupoles.
• For HMS sieve, rate 340 Hz at 20uA
• For SHMS sieve, rate of 285 Hz at 20 uA

Beam Energy Measurement

• Experts: MCC,Mark Jones, Dave Mack
• Expected time: 2 hours
• Goal: Measure beam energy for carbon elastics.
• Conditions:

beam current:	5uA
fast raster:	off
target:	none

• Run Plan: MCC procedure

HMS delta scan with LH2

• Expected time: 5 hour
• Goal: Checkout HMS delta matrix. Have baseline for comparison at higher HMS central momentum
• Conditions:

beam current:	3 μA
fast raster:	1x1cm
target:	10cm LH2
HMS collimator:	Pion
HMS trigger:	SCIN 3/4
HMS angle/momentum	13.5 deg, -2.309 to -1.889 GeV/c

• HMS Run Plan:pdf

Inelastic on 1H at 21.95 degrees

• Experts: S. Malace
• Expected Time: 4 hour
• Goal : Data to compare to known cross sections
• Conditions: Prescale to 2 kHz

beam current (uA):	5
fast raster:	3x3
target:	10cm LH2, 10cm aluminum
HMS collimator:	PION
HMS trigger:	SCIN 3/4
HMS angle/momentum	21.95 / given in table

• Run Plan:

  Eprime         suggested time (Hydrogen)   suggested time (10 cm Aluminum dummy)

  1.6162              20 min                         10 min

• Do target boiling and BCM calibration plans listed below. Then continue with the program

 Eprime         suggested time (Hydrogen)   suggested time (10 cm Aluminum dummy)

  1.3773              20 min                         10 min

  1.2000              20 min                         10 min

  1.0500              20 min                         10 min

  0.9000              20 min                         10 min

Target boiling study

• Experts: Eric Christy
• Expected time: 1.5 hours
• Goal: Measure target boiling.
• Conditions: Prescale to 2 kHz, cycle magnets. Each current a ten minute run.

beam current (uA):	1, 3, 5, 7, 10, 12, 15, 17, 20
fast raster:	3x3mm
target:	10cm LH2, 0.5% Carbon
HMS collimator:	PION
HMS trigger:	SCIN 3/4
HMS angle/momentum	21.95 deg, -1.6162 GeV/c

BCM Calibration

• Experts: Eric Christy
• Expected time: 1 hour
• Goal: BCM Calibration data including low currents to look at non-linearities
• Conditions: Slit closed for zero current
• Procedure: Ask MCC to ramp up and then down covering the currents below with alternating on/off and 2 minutes at each current

beam currents (uA):	0, 1, 0, 3, 0, 5, 0, 7, 0, 10, 0, 12, 0, 15, 0, 17, 0, 20
fast raster:	off
target:	0.5% Carbon
HMS angle	21.95
HMS momentum	1.2

Inelastic on 1H at 42.5 degrees

• Experts: S. Malace
• Expected Time: 9 hours
• Goal : Data to compare to known cross sections. Carbon target for pointing at the first momentum.
• Conditions: Prescale to 2 kHz

beam current (uA):	10
fast raster:	3x3
target:	10cm LH2, 10cm dummy, 0.5% carbon
HMS collimator:	PION
HMS trigger:	SCIN 3/4
HMS angle/momentum	42.5 / given in table

• Run Plan:

  Eprime        suggested time (Hydrogen)   suggested time (10 cm Aluminum dummy)       Carbon

  1.2000              1 h                         10 min                                   10 min
  
  1.0400              1 h                         10 min

  0.9200              1 h                         10 min

  0.8000              1 h                         10 min

  0.7000              1 h                         10 min

  0.6000              1 h                         10 min

SHMS Delta checkout with Carbon Elastic ground state

• Experts: M. Jones, H. Smuzila
• Expected time: 3 hour
• Goal: To take data with carbon elastic ground state and first excited state to test delta resolution.
• Conditions:

beam current:	5-20 μA
fast raster:	off
target:	0.5% carbon
SHMS collimator:	CENTERED SIEVE
SHMS trigger:	SCIN 3/4
SHMS angle/momentum	7.5 deg, 2.214 GeV/c

• Run Plan:

HMS Trigger Efficiency study

• Experts: E. Pooser
• Expected Time:
• Goal : To test sensitivity to threshold in the 3/4 and other triggers.
• Need to gain match the HMS Cerenkov according to Hamlet's suggestion elog entry
• Conditions: Parasitic with the HMS Angle/Position Optics Matrix
• Run Plan:

SHMS/HMS Delta Matrix calibration

• Experts: M. Jones, H. Smuzila
• Expected time: 12 hour
• Goal: To
• Conditions:

beam current:	5-10 μA (whatever is stable)
fast raster:	off
target:	0.5% carbon
SHMS collimator:	Collimator
SHMS trigger:	SCIN 3/4
SHMS angle/momentum	7.5 deg, various momentum

• Run Plan: Scan delta in 2% steps.
• Try with different vertical and horizontal beam positions.

SHMS Quartz bar gain matching

• Experts: S. Malace
• Expected Time: 1 hour
• Goal : Gain match quartz bars.
• Conditions:

beam current:	5-10 uA (or more if easily available)
fast raster:	3x3
target:	10 cm LH2
SHMS	Collimator
SHMS trigger:	3/4 scin
SHMS angle/momentum	25. deg, -1.4 GeV/c

• Run Plan:

HMS Angle and position matrix optimization for large ytgt (partially completed)

• Experts: M Jones, H Szumila
• Expected time:
• Goal: Calibrate HMS ytgt, yptar and xptar for 10cm target.
• Conditions:

beam current:	10 uA (or more if easily available)
fast raster:	off
target:	Optics #1 target (0,+/-10cm foils) and Optics #2 target (+/-5cm foils)
HMS	Sieve
HMS trigger:	3/4 scin
HMS angle/momentum	30. deg, -1.3 GeV/c

• Run Plan:
  • Cycle magnets. Insert sieve.
  • MCC will ask for ion chamber calibration on optics #1 and optics #2 target.
  • Insert optics #1 target. Take data for 1 hour.
  • Insert optics #2 target. Take data for 1 hour.

1H(eep) Coincidence SHMS (proton) and HMS (electron)

• Experts: D. Dutta, S. Basnet, A. Karki
• Expected time: 1 hour
• Goal: Setup coincidence timimg. Kinematic for HEEPcheck. Measure cross section.
• Conditions:

beam current:	5-60 μA
fast raster:	3x3mm
target:	10cm LH2, 10cm dummy
HMS/SHMS collimator:	PION , COLLIMATOR
HMS/SHMS trigger:	SCIN 3/4, SCIN 3/4
HMS angle/momentum	65.1 deg, -0.936 GeV/c
SHMS angle/momentum	25.0 deg, +2.012 GeV/c

• Run Plan:

1H(eep) Coincidence SHMS (electron) and HMS (proton)

• Experts: D. Dutta, S. Basnet, A. Karki
• Expected time: 1 hour
• Goal: Setup coincidence timimg. Kinematic for HEEPcheck. Measure cross section.
• Setting 1:

beam current:	5-10 μA
fast raster:	3x3mm
target:	10cm LH2, 10cm dummy
HMS/SHMS collimator:	PION , COLLIMATOR
HMS/SHMS trigger:	SCIN 3/4, SCIN 3/4
HMS angle/momentum	53.3 deg, +0.957 GeV/c
SHMS angle/momentum	25.0 deg, -1.816 GeV/c

• Setting 2: Here, we will do a mini-delta-scan in the SHMS to check acceptance.

beam current:	5-10 μA
fast raster:	3x3mm
target:	10cm LH2, 10cm dummy
HMS/SHMS collimator:	PION , COLLIMATOR
HMS/SHMS trigger:	SCIN 3/4, SCIN 3/4
HMS angle/momentum	47.9 deg, +1.136 GeV/c
SHMS angle/momentum (a)	30.0 deg, -1.816 GeV/c (-7%)
SHMS angle/momentum (b)	30.0 deg, -1.686 GeV/c (0%)
SHMS angle/momentum (c)	30.0 deg, -1.555 GeV/c (8.5)%

SHMS Angle and Position Matrix Optimization

• Experts:
• Expected time: 2 hour
• Goal: SHMS angle and position matrix optimization
• Conditions:

beam current:	5-20 μA
fast raster:	off
target:	optics target 1, optics target 2
HMS/SHMS collimator:	Sieve , Centered Sieve
HMS/SHMS trigger:	SCIN 3/4, SCIN 3/4
HMS angle/momentum	30. deg, -1.3 GeV/c
SHMS angle/momentum	25 deg, -1.4 GeV/c

• Run Plan: