Difference between revisions of "Short Term Run-Plan"

From HallCWiki
Jump to navigationJump to search
Line 5: Line 5:
  
 
Angle constraints on Spectrometers [https://logbooks.jlab.org/entry/4179104]
 
Angle constraints on Spectrometers [https://logbooks.jlab.org/entry/4179104]
−
 
 
Minimum angles: HMS 12.37;  
 
Minimum angles: HMS 12.37;  
 
SHMS: 28.30;   
 
SHMS: 28.30;   
 
separation: 48.30 deg;
 
separation: 48.30 deg;
−
 
 
Table of corrector currents for different SHMS/NPS angles: [https://hallcweb.jlab.org/wiki/images/9/93/NPS_angles_currents.pdf]
 
Table of corrector currents for different SHMS/NPS angles: [https://hallcweb.jlab.org/wiki/images/9/93/NPS_angles_currents.pdf]
  
 
[https://hallcweb.jlab.org/rcdb Online nps database: https://hallcweb.jlab.org/rcdb]
 
[https://hallcweb.jlab.org/rcdb Online nps database: https://hallcweb.jlab.org/rcdb]
 +
 
<b><span style ="color:red"> '''Friday 6 Oct 2023 Swing through Saturday Owl </span></b>
 
<b><span style ="color:red"> '''Friday 6 Oct 2023 Swing through Saturday Owl </span></b>
−
 
 
## LD2 Target
 
## LD2 Target
 
### One 20-minute run on LD2, ps6=0, 15 uA, Sweep magnet current=648 A  
 
### One 20-minute run on LD2, ps6=0, 15 uA, Sweep magnet current=648 A  

Revision as of 17:23, 6 October 2023

The sections in italic refer to offline analysis by experts.

The Full Run Plan is available to you here for your information. That Full Run Plan is not chronologically ordered. The short-term run plan is outlined below. The tasks at hand on any given day should be at the top of this page. The page will be updated regularly. Tasks below the line might or might not be completed and are kept on this page for reference.


Angle constraints on Spectrometers [1] Minimum angles: HMS 12.37; SHMS: 28.30; separation: 48.30 deg; Table of corrector currents for different SHMS/NPS angles: [2]

Online nps database: https://hallcweb.jlab.org/rcdb

Friday 6 Oct 2023 Swing through Saturday Owl

    1. LD2 Target
      1. One 20-minute run on LD2, ps6=0, 15 uA, Sweep magnet current=648 A
      2. One 20-minute run on LD2, ps6=0, 15 uA, Sweep magnet current=324 A (ask MCC to lower this current for you)
      3. One 20-minute run on LD2, ps6=0, 15 uA, Sweep magnet current=0 A (ask MCC to lower this current for you)
      4. Return sweep magnet to 648 A
      5. Two 1-hour runs on LD2, ps6=0, 15 uA
  1. New KinC_x50_2 'cycle'
    1. LD2 Target
      1. Efficiency run 20min LD2, 15 uA, ps3=5 or as necessary for ≤ 2 kHz trigger rate to CODA
      2. Efficiency run 20min LD2, 10 uA, ps3=5 or as necessary for ≤ 2 kHz trigger rate to CODA
      3. Efficiency run 20min LD2, 5 uA, ps3=5 or as necessary for ≤ 2 kHz trigger rate to CODA
      4. Three 1-hour runs on LD2, ps6=0, 15 uA (0.054 C per run)
    2. LH2 Target
      1. Three 1-hour runs on LH2, ps6=0, 30 uA (0.108 C per run)
      2. Efficiency run 20min LH2, 30 uA, ps3=4 or as necessary for ≤ 2 kHz trigger rate to CODA
      3. Efficiency run 20min LH2, 15 uA, ps3=4 or as necessary for ≤ 2 kHz trigger rate to CODA
      4. Efficiency run 20min LH2, 7 uA, ps3=4 or as necessary for ≤ 2 kHz trigger rate to CODA
    3. Dummy Target
      1. 30 min run at 30 uA (0.054 C), ps6=0
      2. Efficiency run 20min dummy, 30 uA, ps3=4 or as necessary for ≤ 2 kHz trigger rate to CODA
      3. Efficiency run 20min dummy, 15 uA, ps3=4 or as necessary for ≤ 2 kHz trigger rate to CODA
      4. Efficiency run 20min dummy, 7 uA, ps3=4 or as necessary for ≤ 2 kHz trigger rate to CODA
    4. LD2 Target
      1. Three 1-hour runs on LD2, ps6=0, 15 uA (0.054 C per run)

Saturday 7 Oct 2023

  1. New KinC_x50_2 'cycle'
    1. LD2 Target
      1. Efficiency run 30min LD2, 15 uA, ps3=5 or as necessary for ≤ 2 kHz trigger rate to CODA
      2. Three 1-hour runs on LD2, ps6=0, 15 uA (0.054 C per run)
    2. LH2 Target
      1. Three 1-hour runs on LH2, ps6=0, 30 uA (0.108 C per run)
      2. Efficiency run 30min LH2, 30 uA, ps3=4 or as necessary for ≤ 2 kHz trigger rate to CODA (0.054 C)
    3. Dummy Target
      1. 30 min run at 30 uA (0.054 C), ps6=0
    4. LD2 Target
      1. Three 1-hour runs on LD2, ps6=0, 15 uA (0.054 C per run)

Sunday 8 Oct 2023 Day shift

  1. Moller polarization measurement (D. Gaskell)
  • Move to KinC_x60_3
    • HMS angle = 16.483 deg (Move HMS before SHMS). P_HMS = -5.878 (electrons)
    • SHMS angle = 35.02 deg
    • Expected HMS LH2-DIS rate = 1 KHz, DVCS photon energy = 5 GeV

The instructions below are for previous shifts and are kept here for the record.

Thursday 05 Oct 2023, Starting with Swing Shift

  • KinC_x50_2 Production
    • SHMS at 36.88 deg (NPS at 20.58).
    • HMS -6.667 GeV (electrons), angle 12.493 deg
    • All CODA ps = -1, except as noted,
  1. Complete previous cycle, Complete new entries on Run Sheets, Record charge/run in Shift Summary
    1. CODA Configuration coin_sparse,
    2. LH2 Target
      1. NPS Sweep magnet OFF
        1. 30 min run on LH2, ps6=0, 30 uA (0.054 C)
      2. NPS Sweep Magnet ON
        1. 30 min run on LH2, ps6=0, 30 uA (0.054 C)
        2. 30 min run on LH2, ps6=0, 30 uA (0.054 C)
        3. Efficiency Run 30 min LH2 30uA, ps3=4 or as necessary for ≤ 2 kHz trigger rate to CODA (0.054 C)
        4. 30 min run on Dummy at 30 uA (0.054 C), ps6=0
    3. LD2 Target
      1. Three 1-hour runs on LD2, ps6=0, 15 uA (0.054 C per run)
  2. New KinC_x50_2 'cycle'
    1. LD2 Target
      1. Efficiency run 30min LD2, 15 uA, ps3=5 or as necessary for ≤ 2 kHz trigger rate to CODA
      2. Three 1-hour runs on LD2, ps6=0, 15 uA (0.054 C per run) Owl Friday completed runs 1643, 1644, 1645
    2. LH2 Target
      1. Two 1-hour runs on LH2, ps6=0, 30 uA (0.108 C per run)
      2. Special run with _PAIR_THR=600 in nps-vtp.cfg file,
        1. One-hour run on LH2, ps6=0, adjust current to keep hTRIG6 rate < 2 KHz
      3. Restore _PAIR_THR=950 in nps-vtp.cfg file
      4. Efficiency run 30min LH2, 30 uA, ps3=4 or as necessary for ≤ 2 kHz trigger rate to CODA (0.054 C)
      5. Efficiency run 15 min LH2, 10 uA ps3=2 or as necessary for ≤ 2 kHz trigger rate to CODA (0.09 C)
    3. Dummy Target
      1. 30 min run at 30 uA (0.054 C), ps6=0
    4. LD2 Target
      1. Three 1-hour runs on LD2, ps6=0, 15 uA (0.054 C per run)



Wednesday 04 Oct 2023, Day Shift

  • Junk runs 1611 and 1612 established NPS_T6 (2 photons) close to NPS_T1 (1 photon) on LD2 at 15 uA with _PAIR_THR=950 in nps-vtp.cfg
  • Wassim loaded new thresholds in nps-vme.cfg. This lowered rates by 25% (e.g. NPS_T1 dropped from 4.2e5 to 3.2e5)
  • KinC_x50_2 Production
    • SHMS at 36.88 deg (NPS at 20.58).
    • HMS -6.667 GeV (electrons), angle 12.493 deg
    • All CODA ps = -1, except as noted,
    • All runs with CODA config coin_sparse, EDTM = 60 Hz
  • Shift Crew: Keep track of running totals of accumulated charge (each target separately)
    • Goal: Integrated beam charge of 3.24 Coulomb on each target (LH2 and LD2), 0.3 C on Dummy (10cm) target.
  1. KinC_x50_2 "cycle", SPARSIFICATION ON (CODA Configure coin_sparse)
    1. LD2 target
      1. One hour run on LD2, ps6=0, 15 uA (0.03 C)
      2. Expert login to nps-vtp1:nps-vtp/cfg/coin_sparse. cp nps-vtp.cfg_narrow_sparse_window nps-vtp.cfg
      3. One hour run on LD2, ps6=0, 15 uA (0.03 C)
        1. Expert analyze for any differences in previous two runs
      4. One hour run on LD2, ps6=0, 15 uA (0.03 C)
      5. NPS Sweep Magnet OFF 30 min run LD2 ps6=0 15 uA
      6. NPS Sweep ON 468 Amp, Correctors off
      7. Efficiency run, 30 min LD2 15 uA , ps3=5 or as necessary for ≤ 2 kHz trigger rate to CODA
    2. LH2 Target
      1. One hour run on LH2, ps6=0, 30 uA (0.06 C)
      2. Expert login to nps-vtp1:nps-vtp/cfg/coin_sparse. cp nps-vtp.cfg_wide_sparse_window nps-vtp.cfg
      3. One hour run on LH2, ps6=0, 30 uA (0.06 C)
      4. Expert login to nps-vtp1:nps-vtp/cfg/coin_sparse. cp nps-vtp.cfg_narrow_sparse_window nps-vtp.cfg
      5. One hour run on LH2, ps6=0, 30 uA (0.06 C)
      6. Efficiency Run 30 min LH2 30uA, ps3=4 or as necessary for ≤ 2 kHz trigger rate to CODA (0.03 C)
    3. 30 min run on Dummy at 30 uA (0.03 C), ps6=0
    4. Three 1-hour runs on LD2, ps6=0, 15 uA (0.09 C total)
  • Wednesday Swing, Thurs Owl
  1. KinC_x50_2 "cycle", SPARSIFICATION ON (CODA Configure coin_sparse)
    1. Three 1-hour runs on LD2, ps6=0, 15 uA (0.09 C)
    2. Efficiency run, 30 min LD2 15 uA , ps3=5 or as necessary for ≤ 2 kHz trigger rate to CODA (0.03 C)
    3. Three 1-hour run on LH2, ps6=0, 30 uA (0.06 C) Owl Thursday completed two hours, runs 1630, 1631
    4. Efficiency Run 30 min LH2 30uA, ps3=4 or as necessary for ≤ 2 kHz trigger rate to CODA (0.03 C)
    5. 30 min run on Dummy at 30 uA (0.03 C), ps6=0
    6. Three 1-hour runs on LD2, ps6=0, 15 uA (0.09 C)



Tuesday 3 Oct 2023

  1. Production KinC_x50_2
    1. SHMS at 36.88 deg (NPS at 20.58). Move SHMS first!
    2. HMS -6.667 GeV (electrons), angle 12.493 deg
    3. All ps = -1, except as noted,
    4. All runs with CODA config coin_sparse, EDTM = 60 Hz
      1. Three 1-hour runs on LH2 20 uA (Total of 0.32 Coulomb beam charge), ps5=0
      2. 30 min run on Dummy at 20 uA (0.03 C), ps5=0
      3. Three 1-hour runs on LD2 (Total of 0.32 Coulomb beam charge), ps5=0
      4. One 1-hour run on LD2 with 10 uA beam, ps5=0
      5. One 1-hour run on LD2 with 15 uA beam, ps5=0
      6. One 1-hour run on LD2 with 15 uA beam, ps6=0
      7. Efficiency run, 20 min (0.02 C), ps5=-1, ps3=4 or as necessary for ≤ 2 kHz trigger rate to CODA both LH2 and LD2
    5. Tuesday Swing Shift Repeat the (modified) cycle. Note change to ps6
      1. Three 1-hour runs (or six 30 min) on LH2 30 uA (Total of 0.32 Coulomb beam charge), ps6=0 others -1. Lower beam current if necessary to keep "Livetime" in CODA ≥ 90%
      2. Efficiency run, 20 min (0.02 C), ps5=-1, ps3=4 or as necessary for ≤ 2 kHz trigger rate to CODA, LH2
      3. 30 min run on Dummy at 30 uA (0.03 C), ps6=0
      4. Six 1-hour runs on LD2 15 uA (Total of 0.16 Coulomb beam charge), ps6=0
      5. Efficiency run, 30 min LD2 15 uA , ps3=5 or as necessary for ≤ 2 kHz trigger rate to CODA
    6. Wednesday Day shift complete here at noon, Run 1610
    7. keep track of the total charge accumulated on each target. The total charge on target (above 5uAmp) is available in the end of run hclog entry. Goal:
      1. Integrated beam charge of 3.24 Coulomb on each target (LH2 and LD2), 0.3 C on Dummy (10cm) target.


  • Access at end of week to install new "26 deg wings" on Sweep Magnet



Monday 2 Oct 2023 Runs 1549, 1550

  • Elastic Run Plan completed by 8:15 am
  • NPS Calorimeter moved to 3m by 10:00 am,
  • HMS still in elastic proton configuration p_HMS = +4.087. HMS angle =29.86 deg;
  1. 90 min Cosmic Run
  2. 90 min LED run
  3. Anode current Pedestal Check/reload Yaopeng Zhang
    1. 10 min run, beam off
  4. NPS Alignment Check: Elastics run with SHMS at 32.28 deg (NPS =15.98 deg)
    1. 1 hour run with NPS Sweep Off CODA Config coin
      1. Check NDX and PMT Anode currents!!
      2. As per https://logbooks.jlab.org/entry/4180365
        1. Readout of neutron detectors INX3sH1_nDsRt and INX3sH2_nDsRt are in rem/hour
        2. Readout of gamma detectors INX3sH1_gDsRt and INX3sH2_gDsRt are in rad/hour
    2. 1 hour run with CODA Config coin_sparse
    3. 1 hour run with NPS Sweep On and CODA Config coin_sparse Analysis to look for any gain shift from sweep magnet fringe field
  5. Production KinC_x50_2
    1. SHMS at 36.88 deg (NPS at 20.58). Move SHMS first!
    2. HMS -6.667 GeV (electrons), angle 12.493 deg
    3. All ps = -1, except as noted,
    4. All runs with CODA config coin_sparse, EDTM = 60 Hz
      1. Three 1-hour # Production KinC_x50_2
    5. SHMS at 36.88 deg (NPS at 20.58). Move SHMS first!
    6. HMS -6.667 GeV (electrons), angle 12.493 deg
    7. All ps = -1, except as noted,
    8. All runs with CODA config coin_sparse, EDTM = 60 Hzruns on LH2 (Total of 0.32 Coulomb beam charge), ps5=0
      1. 30 min run on Dummy (0.03 C), ps5=0
      2. Three 1-hour runs on LD2 (Total of 0.32 Coulomb beam charge), ps5=0
      3. Efficiency run, 20 min (0.02 C), ps5=-1, ps3=4 or as necessary for ≤ 1 kHz trigger rate to CODA
    9. Repeat the cycle to achieve total (equivalent) goals:
      1. Integrated beam charge of 3.24 Coulomb on each target (LH2 and LD2), 0.3 C on Dummy (10cm) target.
      2. 30 hours (at 30 uA) on each target (LH2 and LD2). 3 hours on Dummy
  • Access at end of week to install new "26 deg wings" on Sweep Magnet



Sunday 1 Oct 2023 Day and Swing

  • Switch back to HMS E Runs 1549, 1550 lastic Proton Setting (Proton polarity) p_HMS = +4.087. HMS angle =29.86 deg;
  1. (MUST HAVE: 6h)
    1. SHMS at 32.28 deg (NPS =15.98 deg) - Take 2 one-hour runs with LH2 target with 30 uA SPARSIFICATION OFF Runs 1549, 1550
    2. SHMS at 31.19 deg (NPS = 14.89 deg) - Take 2 one-hour runs with LH2 target with 30 uA SPARSIFICATION OFF
    3. SHMS at 33.48 deg (NPS =17.18 deg), take 1-hour data with LH2 target 30 uA, SPARSIFICATION OFF
    4. SHMS at 33.48 deg (NPS =17.18 deg), take 1-hour data with LH2 target 30 uA, SPARSIFICATION ON
  2. (IF POSSIBLE : 6h)
    1. SHMS at 33.48 deg (NPS =17.18 deg), take 1-hour data with LH2 target 30 uA, SPARSIFICATION OFF
    2. SHMS at 33.48 deg (NPS =17.18 deg), take 1-hour data with LH2 target 30 uA, SPARSIFICATION ON
    3. SHMS at 32.28 deg (NPS =15.98 deg), take 1-hour data with LH2 target 30 uA, SPARSIFICATION OFF
    4. SHMS at 32.28 deg (NPS =15.98 deg), take 1-hour data with LH2 target 30 uA, SPARSIFICATION ON
    5. SHMS at 31.19 deg (NPS = 14.89 deg), take 1-hour data with LH2 target 30 uA, SPARSIFICATION OFF Runs 1560
    6. SHMS at 31.19 deg (NPS = 14.89 deg), take 1-hour data with LH2 target 30 uA, SPARSIFICATION ON Runs 1559

Monday Day Shift

  • Move Calorimeter to 3m (could be delayed until ~10:00am?)



Thursday 28 Sept 2023 Swing

On NPS terminal, load NPS HV file production-HV.txt

Third Pass NPS Elastic Calibration

  • HMS Elastic Proton Runs 1549, 1550 Setting (Proton polarity) p_HMS = +4.087. HMS angle =29.86 deg;
    • Label runs "5-pass Elastic"
    • FADC Gain Factors set to 0.5, VTP threshold values are close to true MeV for integrated cluster energies
    • 2-cluster trigger in VTP enabled, single cluster threshold 500 'MeV', in both coin and coin_sparse for next two runs
    • For SPARSIFICATION off, CODA: RESET, CONFIGURE coin, DOWNLOAD
    • For SPARSIFICATION on, CODA: RESET, CONFIGURE coin_sparse, DOWNLOAD
  1. Elastic Runs with ps3=0, all others -1
    1. SHMS at 33.48 deg (NPS =17.18 deg), take 1 hour data with LH2 target (down time corrected) 30 uA, SPARSIFICATION off
    2. SHMS at 33.48 deg (NPS =17.18 deg), take 1 hour data with LH2 target (down time corrected) 30 uA, SPARSIFICATION on
    3. SHMS at 33.48 deg (NPS =17.18 deg), take 1 hour data with LH2 target (down time corrected) 30 uA, SPARSIFICATION on
  2. Elastic with ps5=0, all others -1
    1. SHMS at 33.48 deg (NPS =17.18 deg), take 1 hour data with LH2 target (down time corrected) 30 uA, SPARSIFICATION on
  3. Elastic with ps3=0, all others -1
  4. Start Here Friday 29 Sept 2023 Day Shift
    1. SHMS at 32.28 deg (NPS =15.98 deg) - Take 2 one-hour runs with LH2 target with 30 uA SPARSIFICATION on
    2. SHMS at 31.19 deg (NPS = 14.89 deg) - Take 2 one-hour runs with LH2 target with 30 uA SPARSIFICATION on
    3. SHMS at 33.48 de Runs 1549, 1550 g (NPS =17.18 deg), take 1 hour data with LH2 target (down time corrected) 30 uA, SPARSIFICATION on
    4. SHMS at 33.48 deg (NPS =17.18 deg), take 1 hour data with LH2 target (down time corrected) 30 uA, SPARSIFICATION off


Friday 29 Sept 2023 Swing(?) Shift

  • Ramp HMS to zero, switch polarity to Electrons
  • KinC-x50-2 Setting
    • SHMS at 36.88 deg (NPS at 20.58). Move SHMS first!
    • HMS p= -6.667 GeV (note this is detuned 2% from 6.8 GeV
    • HMS angles various (see below from 12.493 production to 19.15 for elastic optics)
  1. Target Boiling study at HMS = 12.493 deg (do both LH2 and LD2)
    1. Calo HV Off, Sweep Magnet Off
    2. EDTM = 100 , PS4=0, all others -1, label runs "Target Boiling" in CODA comments
    3. Expected HMS raw El-Real (T4) rate at 45 uAmp is 12K/sec. Addjustments to ps4 indicated below should keep Trigger rate around 1.5 K for all settings.
    4. All prescales -1 except ps4 (El-Real). Take 10 min runs at each setting
    5. Make a screen shot of NDX stripchart for each run
      1. Beam = 45 uA, ps4 = 4 (9:1)
      2. Beam = 25 uA, ps4 = 3 (5:1)
      3. Beam = 15 uA, ps4 = 2 (3:1)
      4. Beam = 10 uA, ps4 = 1 (2:1)
      5. Beam = 5 uA, ps4 = 0
    6. Repeat with LD2 https://logbooks.jlab.org/entry/4190318
  • KinC-x50-2 Optics all at HMS -6.667 GeV (electrons). Calo HV off
    • HMS Elastic ps4=0, all others -1, Sweep Magnet Off, beam 30 muAmp, Target LH2, Collimator=Large
      • HMS at 19.15 deg, 30 min run
      • HMS at 18.00 deg, 30 min run
      • HMS at 16.85 deg, 30 min run
    • HMS DIS Optics, HMS at 12.493 deg Sweep Magnet Off, Sieve Collimator
      • Target C 0.5% (single foil), 0.5 hour run, ps4=0. Rate should be roughly 100 Hz (plus EDTM). Run proportionally longer if rate is lower. Runs 1537, 1538
      • Target C 8cm foils, 1.0 hour run, ps4=0. Rate should be roughly 30 Hz (plus EDTM). Run proportionally longer if rate is lower. Runs 1539
    • MCC commission Sweep Magnet on for this setting (SHMS=36.88 deg)
    • HMS DIS Optics, HMS at 12.493 deg Sweep Magnet On, Sieve Collimator
      • Target C 0.5% (single foil), 0.5 hour run, ps4=0 Runs 1541 --1544
      • Target C 8cm foils, 1.0 hour run, ps4=0 Runs 1540
    • HMS Elastic ps4=0, all others -1, Sweep Magnet On, beam 30 muAmp, Target LH2, Collimator=Large
      • HMS at 19.15 deg, 30 min run Runs 1547, 1548
      • HMS at 18.00 deg, 30 min run Runs 1546
      • HMS at 16.85 deg, 30 min run Runs 1545
  • Return HMS to 12.493 deg

Saturday, Sunday

  • More optics and/or return to Elastic calibration.

Monday 1 Oct 2023: Day Shift

  • Move Calorimeter to 3.0 m from target
  • Turn Calo HV on
  • KinC-x50-2 Production
    • 30 hours each on LH2 and LD2, 3 hours on Dummy Target



Wednesday 27 Sept 2023

Third Pass NPS Elastic Calibration

  • HMS Elastic Proton Setting (Proton polarity) p_HMS = +4.087. HMS angle =29.86 deg;
    • 2-cluster trigger in VTP enabled, single cluster threshold 500 'MeV', in both coin and coin_sparse for next two runs
    • For SPARSIFICATION off, CODA: RESET, CONFIGURE coin, DOWNLOAD
    • For SPARSIFICATION on, CODA: RESET, CONFIGURE coin_sparse, DOWNLOAD
  1. Elastic Runs with ps3=0, all others -1
    1. SHMS at 33.48 deg (NPS =17.18 deg), take 1 hour data with LH2 target (down time corrected) 30 uA, SPARSIFICATION off
    2. SHMS at 33.48 deg (NPS =17.18 deg), take 1 hour data with LH2 target (down time corrected) 30 uA, SPARSIFICATION on
    3. SHMS at 33.48 deg (NPS =17.18 deg), take 1 hour data with LH2 target (down time corrected) 30 uA, SPARSIFICATION on
    4. SHMS at 33.48 deg (NPS =17.18 deg), take 1 hour data with LH2 target (down time corrected) 30 uA, SPARSIFICATION on
  2. Elastic with ps5=0, all others -1 skip if you cannot start before 11:00 pm
    1. SHMS at 33.48 deg (NPS =17.18 deg), take 1 hour data with LH2 target (down time corrected) 30 uA, SPARSIFICATION on
  3. Elastic with ps3=0, all others -1
    1. SHMS at 32.28 deg (NPS =15.98 deg) - Take 2 one-hour runs with LH2 target with 30 uA SPARSIFICATION on
    2. SHMS at 31.19 deg (NPS = 14.89 deg) - Take 2 one-hour runs with LH2 target with 30 uA SPARSIFICATION on
  1. Target Boiling: EDTM = 100 , PS3=0, all others -1
    1. Beam = 45uA, 10 min run
    2. Beam = 25uA, 20 min
    3. Beam = 15 uA, 30 min
    4. Beam = 10 uA, 45 min
    5. Beam = 5 uA, 90 min

Thursday 28 Sept 2023 Day Shift

  • If Elastic is completed by 8 am Thursday, then request movement of Calorimeter to 3.0 m from target for Production Setting KinC-x50-2
    • HMS 12.493 deg -6.667 GeV (Check for special current values of Dipole and Quads)
    • SHMS 36.88 deg (NPS 20.58 deg)
    • NPS Sweep Magnet On
    • Expected maximum photon energy 3.6 GeV
    • Expected DIS rate 7600/sec at 30uA
    • Expected pi/e ratio = 0.1
  • Run with ps5=0, all others -1, EDTM=10 Hz


Tuesday 26 Sept 2023


  • HMS Elastic Proton Setting (Proton polarity) p_HMS = +4.087. HMS angle =29.86 deg;

Third Pass NPS Elastic Calibration


Carlos Munoz and Hao Huang will load new HV values

  • HMS Elastic Proton Setting (Proton polarity) p_HMS = +4.087. HMS angle =29.86 deg;
  • In CODA, use Configuration file coin_sparse
    • NPS Sweep Magnet Off
    • SPARSIFICATION 1.
    • PS3=0
    • VTP_NPS_ECALCLUSTER_CLUSTER_TRIGGER_THR=1000 (already set in the config file),
  1. SHMS at 33.48 deg (NPS =17.18 deg), take 2 hour data with LH2 target (down time corrected) 30 uA
  2. SHMS at 32.28 deg (NPS =15.98 deg) - Take 2 hour run with LH2 target with 30 uA Runs 1464, 1467, 1468
  3. SHMS at 31.19 deg (NPS = 14.89 deg) - Take 2 hour run with LH2 target with 30 uA Runs 1461, 1462, 1463
  4. SHMS at 33.48 deg (NPS =17.18 deg), take 2 hour data with LH2 target (down time corrected)
  5. SHMS at 32.28 deg (NPS =15.98 deg) - Take 2 hour run with LH2 target with 30 uA
  6. SHMS at 31.19 deg (NPS = 14.89 deg) - Take 2 hour run with LH2 target with 30 uA
  • If Elastic is completed by 8 am Wed, then request movement of Calorimeter to 3.0 m from target for Production Setting KinC-x50-2
    • HMS 12.493 deg -6.667 GeV (Check for special current values of Dipole and Quads)
    • SHMS 36.88 deg (NPS 20.58 deg)
    • NPS Sweep Magnet On
  1. Target Boiling: EDTM = 100 , PS3=0, all others -1
    1. Beam = 45uA, 10 min run
    2. Beam = 25uA, 20 min
    3. Beam = 15 uA, 30 min
    4. Beam = 10 uA, 45 min
    5. Beam = 5 uA, 90 min


Monday 25 Sept 2023

  • HMS Elastic Proton Setting (Proton polarity) p_HMS = +4.087. HMS angle =29.86 deg;
    • SHMS angle 31.19
    • NPS Sweep Magnet Off
    • SPARSIFICATION 1.
    • PS3=0
    • VTP_NPS_ECALCLUSTER_CLUSTER_TRIGGER_THR=1000,
  1. 1 hour run with ps5=0, all others -1
  1. Target Boiling: EDTM = 0 , PS3=0, all others -1
    1. Beam = 45uA, 10 min run
    2. Beam = 25uA, 20 min
    3. Beam = 15 uA, 30 min
    4. Beam = 10 uA, 45 min
    5. Beam = 5 uA, 90 min


Second Pass NPS Elastic Calibration Note: beam off at 3:00 am Tuesday.


If Carlos Munoz and Hao Huang load new HV values (if nothing is provided, go ahead with the current HV setting):

  • HMS Elastic Proton Setting (Proton polarity) p_HMS = +4.087. HMS angle =29.86 deg;
    • NPS Sweep Magnet Off
    • SPARSIFICATION 1.
    • PS3=0
    • VTP_NPS_ECALCLUSTER_CLUSTER_TRIGGER_THR=1000 (already set in the config file),
  1. SHMS at 33.48 deg (NPS =17.18 deg), take 2 hour data with LH2 target (down time corrected) 30 uA and 25 min run with Dummy Target
  2. SHMS at 32.28 deg (NPS =15.98 deg) - Take 2 hour run with LH2 target with 30 uA + 25 min with Dummy target
  3. SHMS at 31.19 deg (NPS = 14.89 deg) - Take 2 hour run with LH2 target with 30 uA + 25 min with Dummy target
  4. SHMS at 33.48 deg (NPS =17.18 deg), take 2 hour data with LH2 target (down time corrected)
  5. SHMS at 32.28 deg (NPS =15.98 deg) - Take 2 hour run with LH2 target with 30 uA
  6. SHMS at 31.19 deg (NPS = 14.89 deg) - Take 2 hour run with LH2 target with 30 uA


After beam off, Load Cosmic HV and start cosmic with T2 trigger - choose coin_cosmic CODA config. Turn off the HMS magnets, as cryo may adjust the flow


Friday 22 Sept 2023

  • Moller Run (David Gaskell) - Done
  • VTP Firmware Update and testing (Ben Raydo) - Done


Saturday 23 Sept 2023:: Complete First Pass NPS Elastic Calibration - Done

  • Configuration parameters:
    • hccoda@nps-vme1:/nps-vme/cfg/coin/nps-vme.cfg: FADC250_TET=50 ; FADC_SPARSIFICATION=0
    • hccoda@nps-vtp1:/nps-vtp/cfg/coin/nps-vtp.cfg: VTP_NPS_ECALCLUSTER_SEED_THR=150, VTP_NPS_ECALCLUSTER_CLUSTER_TRIGGER_THR=500,
  1. HMS Elastic Proton Setting (Proton polarity) p_HMS = +4.087. HMS angle =29.86 deg; LH2 target, 30 uA; raster on. NPS Sweep Magnet OFF (record snapshot to hclog), PS3=0, all others –1.
    1. SHMS at 31.19 deg (NPS = 14.89 deg) - Take 2 hour (down time corrected) run with LH2 target with 30 uA
    2. SHMS at 32.28 deg (NPS=15.98 deg) - Take 3 hour run with LH2 target with 30 uA
    3. SHMS at 33.48 deg (NPS =17.18 deg), take 2 hour data with LH2 target with 30uA
    4. SHMS at 31.19 deg (NPS = 14.89 deg) - Take 2 hour run with LH2 target with 30 uA -- done, Run 1420, 1421


Sunday 24 Sept 2023

  • Day shift: BCM Calibration (after ~3 hours of steady beam at 30 uA) email Dave Mack 2 hours prior - --
  • Deadtime & Target Boiling Studies
  1. SHMS 38 deg, NPS HV off
  2. HMS 29.86 deg, Momentum 2.500 GeV (protons/pi+) momentum is semi arbitrary expect about 1 kHz event rate in HRS 3/4 (hTRIG3) at 30 uA.
    1. Deadtime Study revised, run with HV on, ps1 variable to adjust event rate completed with run 1433
      1. Take 10 min runs PS3=0, 1, 2, 3, 4 (all others –1)
      2. Adjust beam current and/or PS3 setting so that post prescale rate is between 1 and 2 kHz.
        1. Take 10 min runs with EDTM = 100, 500, 1000, 2000 Hz
    2. Target Boiling: EDTM = 0
      1. Beam = 5uA, PS3=0, EDTM = 50 Hz
      2. Beam = 10uA, PS3=1, EDTM = 100 Hz
      3. Beam = 15uA, PS3=2, EDTM = 150 Hz
      4. Beam = 25uA, PS3=3, EDTM = 250 Hz
      5. Beam = 45uA, PS3=4, EDTM = 450 Hz

Monday 25 Sept 2023

Second Pass NPS Elastic Calibration

  • HMS Elastic Proton Setting (Proton polarity) p_HMS = +4.087. HMS angle =29.86 deg;
    • NPS Sweep Magnet Off
    • Decide if SPARSIFICATION on or off.
    • Decide if using PS3=0 or PS5=0
    • VTP_NPS_ECALCLUSTER_CLUSTER_TRIGGER_THR=500,
  1. SHMS at 33.48 deg (NPS =17.18 deg), take 2 hour data with LH2 target (down time corrected) 30 uA and 25 min run with Dummy Target
  2. SHMS at 32.28 deg (NPS =15.98 deg) - Take 2 hour run with LH2 target with 30 uA + 25 min with Dummy target
  3. SHMS at 31.19 deg (NPS = 14.89 deg) - Take 2 hour run with LH2 target with 30 uA + 25 min with Dummy target
  4. SHMS at 33.48 deg (NPS =17.18 deg), take 2 hour data with LH2 target (down time corrected)
  5. SHMS at 32.28 deg (NPS =15.98 deg) - Take 2 hour run with LH2 target with 30 uA
  6. SHMS at 31.19 deg (NPS = 14.89 deg) - Take 2 hour run with LH2 target with 30 uA



Thursday 09-21-2023

Calorimeter is at 9.5 m from target (we are already at this position).

  • VTP parameter Scan

HMS Elastic Proton Setting (Proton polarity) p_HMS = +4.087. HMS angle =29.86 deg; SHMS at 33.48 deg; LH2 target, 30 uA; raster on. Configuration parameters:

    • hccoda@nps-vme1:/nps-vme/cfg/coin/nps-vme.cfg: FADC250_TET=50 ; SPARSIFICATION=0
    • hccoda@nps-vtp1:/nps-vtp/cfg/coin/nps-vtp.cfg: VTP_NPS_ECALCLUSTER_SEED_THR=150, VTP_NPS_ECALCLUSTER_CLUSTER_TRIGGER_THR=500, VTP_NPS_ECALCLUSTER_CLUSTER_READOUT_THR=250, VTP_NPS_ECALCLUSTER_HIT_DT=5, VTP_NPS_ECALCLUSTER_CLUSTER_PAIR_THR=300, VTP_NPS_ECALCLUSTER_CLUSTER_PAIR_WIDTH=20
  • (REMEMBER to RESET and DOWNLOADS from CODA RCGUI to make each change effective).
  1. Sparsification study PS3=0, all others -1
    1. 30 min run FADC_SPARSIFICATION=0
    2. 30 min run FADC_SPARSIFICATION=1 (for verifying the efficiency of Sparsification readout)
  2. Trigger study:
    1. 20 min T1 run: PS1=0, all others -1
      1. 20 min T5 run: PS5=0, all others -1 (for verifying the efficiency of NPS trigger)
    2. Threshold scan, T3: PS3=0, all others -1, 30 min each Analyze to verify VTP and FADC250 agree on location, time, energy of clusters
      1. VTP_NPS_ECALCLUSTER_CLUSTER_TRIGGER_THR=500, 1500, 2500, 4000
      2. Restore VTP_NPS_ECALCLUSTER_CLUSTER_TRIGGER_THR=500 for elastic runs

NPS Elastic Calibration Data

  • HMS Elastic Proton Setting (Proton polarity) p_HMS = +4.087. HMS angle =29.86 deg;
  • We will scan three SHMS angles 33.48, 32.28, 31.29 deg (starting from 33.48 deg). Corresponding NPS angles: 17.18, 15.98, 14.89 deg. (Three NPS Calorimeter elastic settings (central electron energy is 7.28 GeV)):
  • Elastic Production with T3 trigger (PS3=0, all other -1), 30 microAmp beam on LH2 target;
  • Restore VTP_NPS_ECALCLUSTER_CLUSTER_TRIGGER_THR=500, (experts decide on SPARSIFICATION = 0 or 1. - If there is no instruction from experts, then set sparsification to 0 and take rest of the data).
  1. While at SHMS at 33.48 deg (NPS =17.18 deg), take 2 hour data with LH2 target (down time corrected) and 20 min run with Dummy Target
  2. Move SHMS to 32.28 deg (NPS=15.76 deg) - Take 2 hour run with LH2 target with 30 uA + 20 min with Dummy target
  3. Move SHMS to 31.29 deg (NPS = 14.67 deg) - Take 2 hour run with LH2 target with 30 uA + 20 min with Dummy target
    • Repeat the 1-3 sets of LH2 + Dummy runs


Friday 09-21-2023 Day Shift

  1. Moller run
  2. If Moller not available, or finishes early, BCM calibration



Tuesday 09-19

  1. HMS Optics data Expected data taking time ~6h. For reference, you may consult the Full Run Plan Chapter 3.
    1. Optic calibration at -5.639 GeV/c.
      1. Set NPS Calo to 21.0 deg (SHMS 37.3 deg). Sweep magnet off. We will not use Calo
      2. Set HMS at -5.639 GeV and 12.37 deg. If this angle is not allowed, use smallest available angle (e.g. 16.44 deg)
      3. Put the Sieve in position.
      4. DAQ prescales ps4=0 (1:1) (HMS El-REAL), all others at -1.
      5. Suppress the reading of the NPS calo ([3] here). The NPS HVs and LVs are off during these runs
        1. beam current 30 uA,
        2. NPS sweep magnet off, HMS Sieve in place, target Optics foils +/- 8cm, Run time 1 h. Expected HMS rate 5/sec/hole/foil.
        3. NPS sweep magnet on, HMS Sieve in place, target C 0.5%, Run time 0.5 h. Expected HMS rate 10/sec/hole.
        4. NPS sweep magnet on, HMS Sieve in place, target Optics foils +/- 8cm, Run time 1 h. Expected HMS rate 5/sec/hole/foil.
        5. NPS sweep magnet off, HMS Sieve in place, target Optics foils +/- 3cm, Run time 1 h. Expected HMS rate 5/sec/hole/foil. Run 1265
        6. NPS sweep magnet off, HMS Large collimator, target LH2 Run time 0.5 h. Run 1266
        7. Move HMS to 21.27 deg (HMS elastic at -5.639 GeV) Run 1267
        8. NPS sweep magnet off, HMS Large collimator, target LH2 Run time 0.5 h.
        9. Move HMS to 22.70 deg. repeat elastic Run 1268
        10. Move HMS to 24.30 deg, repeat elastic Run 1269
        11. NPS sweep magnet off, HMS Large collimator, target LH2 Run time 0.5 h.
  2. NPS x50-2 setting:
    1. HMS settings: P=-6.8 GeV (electrons), theta=12.49 degrees
    2. NPS settings: theta_calo = 20.58 degrees (SHMS = 36.88 degrees)
    3. Ask MCC to turn on the NPS sweeper magnet to 468 A. We have been at this setting before, and the sweeper was found to not deflect the beam, so the correctors will not be needed. If needed, point MCC to this elog entry: https://logbooks.jlab.org/entry/4180792
    4. After sweeper magnet is on, turn on the NPS HV and LV (see wiki for instructions - if you have trouble, call Alexandre Camsonne - phone# on whiteboard).
    5. Take data on LH2 at 20 uA with ps4=0, all other prescales set to -1.
  3. Ask for beam off at 8 am Wednesday so we can take an LED run before the Controlled Access.
  4. Wednesday, Day shift: Controlled Access. Work to do:
    1. MQF3M01 (small Moller quad) polarity switch repair
    2. Calorimeter work
    3. HMS/SHMS cryo (Heidi)




Monday 09-18

  1. HMS Optics data Expected data taking time ~6h. For reference, you may consult the Full Run Plan Chapter 3.
    1. Optic calibration at 6.117 GeV/c.
      1. Set NPS Calo to 20.7 deg (SHMS 37.0 deg). Sweep magnet off. We will not use Calo
      2. Set HMS at -6.117 GeV and 12.373 deg. If this angle is not allowed, use smallest available angle (e.g. 16.44 deg)
      3. Put the Sieve in position.
      4. DAQ prescales ps4=0 (1:1) (HMS El-REAL), all others at -1.
      5. Suppress the reading of the NPS calo ([4] here). The NPS HVs and LVs are off during these runs
        1. beam current 30 uA,
        2. NPS sweep magnet off, HMS Sieve in place, target Optics foils +/- 8cm, Run time 1 h. Expected HMS rate 0.9/sec/hole/foil.
        3. NPS sweep magnet on, HMS Sieve in place, target C 0.5%, Run time 0.5 h. Expected HMS rate 2.2/sec/hole.
        4. NPS sweep magnet on, HMS Sieve in place, target Optics foils +/- 8cm, Run time 1 h. Expected HMS rate 0.9/sec/hole/foil.
        5. NPS sweep magnet off, HMS Sieve in place, target Optics foils +/- 3cm, Run time 1 h. Expected HMS rate 0.9/sec/hole/foil.
        6. NPS sweep magnet off, HMS Large collimator, target LH2 Run time 0.5 h. Expected HMS rate 2 Hz (??).
        7. Move HMS to 19.26 deg (HMS elastic at 6.117 GeV)
        8. NPS sweep magnet off, HMS Large collimator, target LH2 Run time 0.5 h. Expected HMS rate 2 Hz (??).
        9. Move HMS to 20.69 deg. repeat elastic
        10. Move HMS to 22.12 deg, repeat elastic
        11. NPS sweep magnet off, HMS Large collimator, target LH2 Run time 0.5 h. Expected HMS rate 2 Hz (??).
    2. HMS Optics at –5.639 GeV (KinC_x25_3')
      1. Calo at large angle, Off
      2. HMS at –5.639 GeV, angle 12.40 deg, Sieve Slit. PS4=0, all others -1. Expected Sieve hole rate ~10 Hz
      3. Repeat same sequence of inclusive runs as for 6.117 GeV above
      4. Elastic Setting, –5.639 GeV, Large Collimator,
        1. HMS at 21.27 deg
        2. HMS at 22.7deg,
        3. HMS at 24.13 deg
  2. Repeat Elastic calibration of the NPS with new HV set. Expected data taking duration 13h.
  3. VTP trigger validation/efficiency studies
    1. take a run (elastic or DVCS kinematics) with coincidence time parameters increased from 20 to 40 ns: VTP_NPS_ECALCLUSTER_HIT_DT, VTP_NPS_TRIG_WIDTH, VTP_NPS_ECALCLUSTER_CLUSTER_PAIR_WIDTH
    2. Restore to 20 ns. Take a run with FADC250_NSA 36
    3. Analysis to check for stability of efficiency/deadtime
  4. Rate/Deadtime vs threshold study in DVCS setting KinC_x36_5
    1. Make factor of 1.4 variations (in tandem?) in thresholds FADC250_TET, VTP_NPS_ECALCLUSTER_SEED_THR, VTP_NPS_ECALCLUSTER_TRIGGER_THR, VTP_NPS_ECALCLUSTER_CLUSTER_PAIR_THR, VTP_NPS_ECALCLUSTER_CLUSTER_READOUT_THR


Sunday Evening 17 Sept 2023

  1. Threshold study of Coincidence NPS DAQ
    1. Note meaning of following parameters
      1. FADC250_TET = threshold amplitude (0 to 4095) of single crystal signal to define a HIT. Current value 200 in file nps-vme.cfg
      2. VTP_NPS_ECALCLUSTER_SEED_THR = threshold of HIT integral (roughly 8x amplitude) converted to MeV to form a seed to look for multi-crystal cluster. Current value is 300 MeV in file nps-vtp.cfg Conversion factor from amplitude to MeV is FADC250_GAIN=1.0 in file nps-vme.cfg
      3. VTP_NPS_ECALCLUSTER_TRIGGER_THR = Threshold (MeV) of the sum of integrals in a cluster to define an NPS Trigger (hTrig1 in trigger display, and the input to the coincidence to form hTrig5 or 6). Based on Malek Mazouz' analysis of run 1181, expect the elastic electron endpoint of the NPS spectrum to be at roughly 3200 MeV (note NPS MeV units are currently arbitrary).
      4. Coincidence time window between HMS and NPS is 140 ns (visible on scope in electronics room)
      5. Sparsification is on (record only cluster waveforms).
    2. With Hydrogen target (PS3=0, all others -1) take runs of 25000 events as follows
      1. VTP_NPS_ECALCLUSTER_TRIGGER_THR = 500, 1000, 2000, 4000. When raw hTRIG1
      2. For each of these settings, take runs with VTP_NPS_ECALCLUSTER_SEED_THR = 300 and 600
      3. For each run, take note of the trigger rate of hTRIG1, hTRIG3, and hTRIG5, also calculate the estimated accidental coincidence rate = (hTRIG1 rate)*(hTRIG3 rate) *(140ns) and compare to hTRIG5 rate to assess True/Random coincidence ratio
      4. Expect hTRIG1 rate to drop near 0 at some threshold value. When it does, take a least one more run to find the endpoint a little more accurately
  2. Timing Study of NPS DAQ (requires an expert). Adjust the latency time in steps of 100 ns. The analyzed time distribution of hits of the true coincidence peak should move. This is proof of true coincidences. It is also possible to adjust the cable delay of 3/4 to push the true coincidences out of the lookback window.
  3. Take two runs (>10,000 events) at 15 and 7.5 muAmp. We can compare true / accidentals from rate scaling
  4. Take a long run ~2hour at the middle elastic angle of 15.76 (SHMS at 32.1 deg)
  5. Continue Optics (below)



Short Term Run Plan Saturday, September 16

  1. Following items when convenient (not yet scheduled)
    1. Beam Energy measurement
    2. Moeller measurement: Monday?
    3. BCM Calibration
    4. IA scan for feedback. This needs to wait until after we have been able to (roughly) calibrate the Hall C BCM in the parity DAQ (should be able to use the ion chamber calibration data for this). This should be coordinated with NPS and Moller polarimeter data runs to compare the asymmetry sign in the three systems. Estimated time is about 1 hour of beam.
  2. Establish the HMS-NPS coincidence. For reference, you may consult Section 2.2 of the Full Run plan. This part of the Run plan is expert-driven (Alex, Chandan, Simona and others)
    1. Move the NPS calorimeter to 12.12 deg. That's 12.12+16.3=28.42 deg for the SHMS.
    2. Check that the HMS is set at -4.367 GeV/c with the large collimator.
    3. Ask MCC for the NPS Sweep Magnet and compensation commissioning for this angle.
    4. NPS pedestal measurement: take a CODA run with the beam off. NPS HV and LV on. The goal is to get pedestal measurements for the NPS DC Anode current monitor.
    5. Ask for 5 microAmp beam on LH2.
    6. Take a HMS 3/4 only trigger run (PS3=0, all others –1). Take a short run (5-10 minutes). Verify that DC anode current (after beam-off pedestal subtraction) is less than 30 muAmp.
    7. Take a longer run.
      1. Check parameter FADC250 SPARSIFICATION = 0 in file nps-vme1:nps-vme/cfg/coin/nps-vme.cfg, to readout all waveforms
      2. Look on scope with persistence mode for true coincidence peak between HMS (PS3) and NPS (PS1) signals. Delayed HMS 3/4 signal marked H3/4 in top chan of PS752 logic unit (4th from right) in main NIM bin in rack CH03B06. This is currently (15 Sept) plugged into scope HCSCOPE01 chan 2. NPS (Trig-1) is 2nd chan PS752, plugged into scope chan 1.
      3. Analyse NPS Waveform data to find time spectrum of pulses. Look for true coincidence peaks.
      4. Analyse NPS Waveform data to verify VTP found all clusters.
    8. If all OK, take a 1 hour run with FADC250 SPARSIFICATION = 1
  3. Elastic Calibration of Calorimeter. Expected duration 13h. For reference, you may consult Section 2.3 of the Full run plan.
    1. Setup HMS : positive polarity p_HMS = +4.036. HMS angle =30.145 deg
    2. Set NPS calorimeter to 15.759 deg. That's SHMS at 15.759+16.3=32.05 deg.
    3. Use LH2 target
    4. NPS Sweep Magnet Off.
    5. CODA setup PS3=0, all others -1 (or possibly PS5=0, others -1 if the proton rate is so high as to create a lot of deadtime)
    6. NPS DAQ configuration:
      1. DTP cluster trigger threshold=500 MeV and readout threshold =100 MeV. The expert is Wassim Hamdi.
      2. check that VTP_NPS_FADCMASK_MODE = 1 (7x7 cluster readout)
    7. For each run condition below: check the anode current is less than 30 uA (using the GUI) and that the number of NPS clusters found per event is less than 15. The expert is Wassim Hamdi and he can check that for you. If necessary, lower the beam current and adjust the run duration. Also, check for saturation of FADC250 amplitude signals (no samples >4000).
    8. Take a one-hour run at 30 uA with the NPS at 15.759 deg (adjust beam current < 30 muAmp to keep NPS Anode DC current < 30muAmp).
    9. Take a one-hour run at 30 uA with the NPS at 14.673 deg. That's SHMS at 14.673+16.3=30.973 deg
    10. Take a one-hour run at 30 uA with the NPS at 16.965 deg. That's SHMS at 16.965+16.3=33.265 deg
    11. Now repeat for more statistics
    12. Take four one-hour runs at 30 uA with the NPS at 15.759 deg (adjust beam current < 30 muAmp to keep NPS Anode DC current < 30muAmp)
    13. Take four one-hour runs at 30 uA with the NPS at 14.673 deg. That's SHMS at 14.673+16.3=30.973 deg
    14. Take four one-hour runs at 30 uA with the NPS at 16.965 deg. That's SHMS at 16.965+16.3=33.265 deg



Short Term Run Plan Friday Sept 15, 2023

  1. Do not move either spectrometer without consulting RC
    1. HMS at 16.44 deg (was iced up last week), SHMS iced up today.
    2. Expect to be able to move NPS Calorimeter from 12.2 to 20 degrees. Start at 20 degrees
    3. Note: NPS calorimeter angle = SHMS set angle minus 16.30 degrees
  2. All data taking with coinc DAQ
    1. HMS `Single arm' data can be taken with PS3 and/or PS4 ≥ 0 (1:1) and PS5 and PS6 –1 (off).
    2. NPS randoms can also be taken with PS1 ≥ 0: This trigger includes the EDTM
    3. RunSheets
    4. For online analysis instruction refer to [5]
  3. Initial standard equipment checkout.
    1. NPS Sweep Magnet and NPS HV off until start of coinc DAQ commissioning.
    2. Beam Centering on Carbon Hole hallcweb.jlab.org/wiki/index.php/Beam_Checkout_Procedures (Coordinate with Dave Gaskell).
    3. Take a short run with rastered beam through empty cylinder (tube) target. The goal is to see minimal change in the ion chamber readings when going through the tube.
    4. BPM Calibration vs. Harp Scan (Bull eyes scan) follow these instructions: [6]
    5. HMS detector verification. The relevant parts of the Run Plan (sections 2.1.6 & 2.1.7) are copied below. HMS nominal momentum -4.367 GeV/c. Start with 10 microAmp beam.
      1. Increase Q2 by +20% current compared to its nominal values to fully illuminate the focal plane. HOW_TO change the current in the HMS). Use LD2 target. Set HMS 3/4 prescale to keep event rate below 1000/sec (expect 2 : 1 prescale). All other prescales −1. EDTM rate 100 Hz (how to). Start with a 5 min run, then a 1 hour run, keep data files below 3M events. Keep the event rate low enough for near 100% efficiency . Analysis lead: Mark Mathison. Verify that all Hodoscope bars are counting and focal plane is illuminated. Check that timing spectra make sense. Contact expert(s) if in doubt. Verify that the events rate after cuts is close to expectations ( Zheng Huang).
      2. Return HMS-Q2 to nominal setting. Run for 1 hour. Use LD2 target. Keep prescales same as for the defocussed setting and record equal sized files. Expect 840 DIS events/sec at 10 microAmp on LH2 target.
      3. Take a 10 minute run with all HMS FADC channels in mode10
    6. PID (electron id) checkout with HMS momentum lowered to 3.60 GeV to keep pions below Cherenkov threshold (4.02 GeV/c)
      1. Run for 1 hour with PS3 ≥ 0 and PS4=–1. Check for clean Cherenkov distribution with selection of high energy signal in Shower. Check for clear single photo-electron peak with selection of MIP (pion) signal in Shower counter.
      2. Run for 1 hour with PS3= –1 and PS4 = 0. Compare Cherenkov signals of the two runs.
    7. NPS Sweep Magnet and compensation commissioning (Calo=20deg) for first look at calo signals while taking HMS optics data
    8. Initial Optics run: take a one hour sieve slit run (HMS single arm), HMS EL-REAL prescale (PS4) =0 and HMS 3/4 prescale(PS3) value 5 (HOWTO prescale values). Single target foil. Ibeam=30 uA (scale run duration if you cannot get 30 uA). Look at xfp versus yfp: the goal is to get at least 200 events per hole. This is how to put the sieve in position.
Retrieved from "https://hallcweb-2024.jlab.org/wiki/index.php?title=Short_Term_Run-Plan&oldid=22585"