Run Group C

[edit]

• Shift Documentation
• Phone Numbers
• Short Term Schedule
• Shift Expert
• Worker Shift
• Monitoring
• Useful Links

Shift Schedule Hall B Logbook ESAD, COO, RSAD Shift Checklist Hot Checkout Beam Time Accounting See guidance at BTA User Guide.

Manuals Polarized Target Manual See also the OSP - scroll down for the target description Raster Operations Manual - see also Raster Monitoring Manual DC FTOF ECAL LTCC HTCC RICH: Expert Shift CTOF CND SVT MVT MVT turn on procedure FT Beamline Torus Power-Up/Down Procedure Solenoid Power-Up/Down Procedure DAQ Slow Controls

Procedures Physics-Quality Beam Performing Møller Runs Performing Harp Scans Tunnel/Hall Access ESAD, COO, RSAD

JLab Logbooks MCC Hall-A Hall-B Hall-C Hall-D

NOTE: All NON-JLab numbers MUST be dialed with (757) area code. When calling from a CH landline, dial "9" first. To call from outside, all 4-digit numbers must be preceded by 757-269

Role Phone Number Hall B Run Coordinator (757) 575-7540 (cell) Hall B Physics Division Liaison (757) 876-1789 (cell) MCC 7048 Crew Chief 7045 Crew Chief (757) 876-3367 (cell) Program Deputy (757) 876-7997 (cell) RadCon (757) 876-1743 (cell) Gate House Guard 5822 Location Phone Number Hall B Floor 5165 Hall B Space Frame 5170 and 5171 Hall B Forward Carriage 5371 Hall B Gas Shed 7115 Hall B Counting House 5244 (Shift Expert) Hall B Counting House (757) 329-4846 (Shift Expert cell) Hall B Counting House 5245 or 5126 (Shift Worker) Hall A Counting House 5501 Hall C Counting House 6000 Hall D Counting House 5504

Hall B System Phone Number On-Call Person Engineering (757) 748-5048 (cell) (757) 897-9060 (cell) Engineering On-Call (primary) Denny Insley (secondary) Slow Controls (757) 748-6922 (cell) Nathan Baltzell Beamline (757) 303-3996 (cell) Eugene Pasyuk DC (757) 218-4372 (cell) (757) 748-5048 (cell) Florian Hauenstein (primary) Engineering On-Call (secondary) SVT/MVT/MM (757) 541-7539 (cell) (757) 753-7769 (cell) Yuri Gotra (primary) Rafo Paremuzyan (secondary) ECAL (757) 810-1489 (cell) Cole Smith FTOF/CTOF/CND (757) 344-7204 (cell) Daniel Carman ALERT (757) 329-4844 (cell) Raphael Dupré HTCC/LTCC (757) 344-7174 (cell) Youri Sharabian FT (757) 344-1848 (cell) Raffaella De Vita BAND (757) 310-7198 (cell) Florian Hauenstein RICH (757) 344-3235 (cell) (757) 748-6922 (cell) Christopher Dilks (primary) Nathan Baltzell (secondary) DAQ (757) 232-6221 (cell) Sergey Boiarinov HYDRA (317) 550-9226 (cell) Torri Jeske Authorized Hall B Solenoid/Torus Operators Hall B Denny Insley, Morgan Cook, Eugene Pasyuk Magnet Group Probir Ghosha, Renuka Rajput-Ghoshal Detector Support Group Brian Eng, Pablo Campero, Tyler Lemon DC Power Onish Kumar, Sarin Philip

• Note, all non-JLab numbers must be dialed with an area code. When calling from a counting-house landline, dial "9" first.
• To call JLab phones from outside the lab, all 4-digit numbers must be preceded by 757-269
• Click Here to edit Phone Numbers. Note, you then also have to edit the current page to force a refresh.

Click Here to edit Phone Numbers. Note, you then also have to edit the current page to force a refresh.

CLAS12 Run Group C, Summer 2022

Daily RC Meetings at 14:00: CH Room 200C, and on Zoom

Zoom information: Link, Meeting ID: 160 867 4253, Passcode: 786506

Run Group Coordinator: Sebastian Kuhn

• (9-)757 639-6640

RC: Carlos Ayerbe

• (9-)757 575-7540 or

PDL: Eugene Pasyuk

• (9-)757 876-1789 , x6020 office

Run Coordinator and Target Expert Schedule

Longterm Run Plan

IMPORTANT NOTES:

• In case of medical or fire emergency, call 9-911 from a LANDLINE phone in the Counting House
• If you have symptoms or a positive COVID test, do NOT come to your shift - instead, inform the PDL and the RC immediately so that replacements can be arranged
• If needed, worker shifts can also be taken from off-site - again, inform the PDL and RC. Also, make sure that you follow the instructions under the "Worker Shift" Tab - you need some lead time to set up!
• Before leaving the hall and going to beam permit check that dome lights, forward carriage lights, and pie tower lights are OFF
• NEW: We have a new policy NOT to leave the beam viewer in the beam at all times, to avoid damage to electronics, cameras etc. Please REMOVE the beam viewer unless we are actively tuning the beam or calibrating beam position/raster.
• NEW: We have a new FSD condition that the raster is operating.
  • IF there is any ammonia sample (NH3 and ND3) in the target, the raster MUST be operating at all times. The Raster FSD must be UNMASKED. Orbit locks MUST be OFF (except for brief moments to restore beam position).
  • For beam tuning or other non-rastered beam, the Raster FSD must be MASKED.
• NOTE: It should no longer be necessary to quit RasterMon at the end of each run and restart after a successful "Go" for the next run, but if DAQ crashes, you should do that. The correct raster calibration constants should be automatically restored to their correct values - see https://logbooks.jlab.org/entry/4004055 - if not, enter them through "Config" by hand. Make sure there is ONLY ONE INSTANCE of RasterMon running anywhere.
• REMINDER FOR ALL EXPERTS: Please take care to fill out the BTA carefully and correctly. The info from EPICS is not always correct, e.g. when taking data with low beam current, you should change the ABU to the proper (estimated) time by hand instead of simply accepting "0" if you are actually taking data.

Run Plan: June 2022

ONGOING ISSUES

• x-Raster power supply oscillations
• Moller quadrupole Power Supply

Short Range Plan

• Thursday 7:30 day shift: maintenance day. Hall B will be in controlled access
  • Helium damage tests: D. Carman
  • Test the ND3 material
  • Test the new NH3 material (if time permits)
  • Fix the power supply of the raster
  • Fix the Moller Quad
  • Switch to empty target
• On empty target with beam: Turn Raster OFF and mask Raster FSD. Inform MCC of the new 2H01 x and y values: 2H01 x = -0.7 mm, y = +0.1 mm Ask them to turn orbit locks ON.
  • FIRST WITHOUT LHe:
    • Try raising beam current up to 15 nA (DC occupancies Region 1 below 5-6%)
    • Configuration PROD66, trigger file rgc_300MeV_v1.2_no_DC.trg
    • Take data for about 2 hours / 40 M events. (This run will be used for Beam offset calibration)
  • IF TIME BEFORE MOLLER (Friday morning, see below; else after Moller):
    • Start raster and unmask raster FSD (orbit locks OFF)
    • Raise beam current again to about 10-15 nA (check DC occupancies)
    • Configuration PROD66, trigger file rgc_300MeV_v1.2_no_DC.trg
    • Take 1 run (2 hours/50 Mevents)
  • Friday morning (begin day shift): Attempt another Moller run + spin dance:
    • Set up for Moller running (4 nA beam on Tagger, Photon configuration with mask, etc.).
    • Take one Moller run
    • Ask MCC to start the spin dance (They change the Wien angle and we do Moller runs). The spin dance should not go longer than 3 hours.
  • Restore beam, detectors etc. to FC
    • Start raster and unmask raster FSD (orbit locks OFF)
    • Fill target with LHe (ask target expert). Reduce beam current as needed to keep DC occupancies around 5%.
    • Raise beam current again to about 10-15 nA (check DC occupancies)
    • Configuration PROD66, trigger file rgc_300MeV_v1.2_no_DC.trg
    • Take 1 run (4 hours / 100 M events) with raster and standard configuration
  • DC Alignment run (can be moved around according to actual progress on the previous points):
    • Before ramping down solenoid, call Rafayel Paremuzyan to bypass MVT HV interlock for no solenoid and set the correct HV settings for alignment run
    • Ramp down solenoid and torus, lower LHe level in target to about 20% (ask target expert)
    • Run with 1 nA. Trigger file rgc_300MeV_v1.2_zero.trg (see https://logbooks.jlab.org/entry/4006380 and https://logbooks.jlab.org/entry/4003282 for instructions). Inform Valery Kubarovsky and Rafo before taking data! Take at least 5M triggers each with Trigger Bit 14 and with Trigger Bit 24; i.e., if trigger bit 14 is a fraction x of the total trigger rate, take 5M/x events,
    • Ramp Solenoid and Torus back up while waiting for beam on tagger.
• END EMPTY TARGET RUNNING. Ask target group to install new target (NH3 or CH2 - check with RC/Sebastian/Target Group).
  • Raster on, FSD unmasked, no orbit lock.
  • Ask MCC to move HWP (a.k.a. 1/2 Wave Plate or lambda/2 plate) IN.
  • Wait until target polarization is more negative than -50%.
  • Take production data with standard trigger rgc_300MeV_v1.2_no_DC.trg, PROD 66.

5-pass (10.55 GeV) Running conditions

• Torus at 100% current, inbending electrons. Setpoint +3766 A
• Solenoid setpoint +2417.5 A
• Establish optimal compromise between raster size (if possible, 7 mm radius), luminosity (goal: <5 nA), and background.
• Run duration 100M events or 4 hours, whichever comes first.
  • For empty target runs, increase beam current as much as possible (up to 15 nA).

DAQ configuration

• Configuration PROD66, trigger file rgc_300MeV_v1.2_no_DC.trg
• NOTE: UNLESS a RICH problem crashes the DAQ, do NOT interrupt an otherwise smooth run to do a RICH recovery - instead do this in between runs.
• NOTE: BOTH the shift expert AND the shift worker MUST check and reset monitoring histograms at least once every 30-60 minutes to make sure there are no major detector problems.Watch the raster pattern!
• At the end of each run, follow the STANDARD DAQ RESTART SEQUENCE:
  • "end run", if the run ended correctly then: "prestart", "go"
  • if the run did not end correctly or if any ROCs had to be rebooted:
    • "cancel", "reset"
    • "configure", "download", "prestart", "go"
• After each step, make sure it is completed in the Run Control message window. If a ROC has crashed, find which one it is, issue a roc_reboot command ON JUST THAT ROC and try again. Contact the DAQ expert if there are any questions.

References and Standards

Solenoid set-point of 2417.5 A results in read back 2419.57 A and exactly 5.00 T field on center Raster settings

• x: Vpp=2.2 V offset =+0.1V
• y: Vpp=2.2 V offset =-0.1V
• Fundamental Period = 1 s

Nominal Beam Positions

• 2H01,x = -0.7 mm, y = +0.1 mm (NEW values!)
• 2C24, X: -2 mm, Y: 0.6 mm
• Orbit lock ONLY if raster is OFF

FSD Thresholds (to be updated)

• Upstream: 2000 Hz
• Midstream: 2000 Hz
• Downstream: 100000 Hz
• BOM: 1000000 Hz
• 5 ms dwell time

Reference Harp Scans for Beam on Faraday Cup 2H01 [1]

Reference Harp Scans for Beam on Tagger dump 2C21 [2], tagger harp [3]

Reference Monitoring Histograms

Counter rates

• Upstream counters integrated rates: 0-15 Hz (acceptable up to 100 Hz are acceptable) @50 nA.
• Midstream counters: 10-20 Hz (acceptable up to 50 Hz) @50 nA.
• Counting rates of ~ hundreds of Hz may indicate bad beam tune or bleed-through from other Halls.

Known issues

1. ECAL: ECAL_HV_SEC2_WI_E36 is off as it does not hold voltage
2. DC: hole in sector 3, superlayer 6, would likely need a major physical repair on the chamber itself

NOTE: BOTH the shift expert AND the shift worker MUST check monitoring histograms at least once every 30 - 60 minutes to make sure there are no major detector problems. Follow the [Short Term Schedule] as outlined by RC includes Run Plan, DAQ configuration, and References and Standards Keep shift summary up to date in HBLOG. Record all that happens. Polarized target issues: In all cases contact the polarized target expert on call. Examples to keep an eye on: Ice on the run valve See the run valve via camera http://hallbcam04/view/index.shtml, (see also Camera on PT12 -- web link at Lognumber 4002803.) Example of ice on the valve, see https://logbooks.jlab.org/entry/4001225. If you see ice, contact the expert on call. NMR running The JLab Polarization Display is seen via a VNC window in the counting room. Here, the NMR Controls' blue bar should be moving, indicating that the NMR is running and the polarization is measured. If the NMR is not running, contact the expert on call. Alarms from System RG-C Polarized Target (alarm handler). If you get an alarm, ... Do a RICH recovery (press the RICH Recovery button on the GUI) once daily during day shift, between runs. Please log in shift summary. Note the automated "RICH Recovery" sequence already confirms RICH4 is up and accepting ssh connections before claiming success. And it also prints out that you have to "Cancel->Reset->Configure->Download->Prestart" before starting the next run. Fill out BTA hourly. Click "Load from EPICS" to automatically fill the left side then correct as needed. Accelerator beam time: ABU: acceptable beam used (eg harp scans, calibrations, trigger settings, running) The info from EPICS is not always correct, e.g. when taking data with low beam current, you should change the ABU to the proper (estimated) time by hand instead of simply accepting "0" if you are actually taking data. BANU: beam acceptable but not used (eg radiator change or our problems) BNA: beam not acceptable (eg tuning, drifting, not focused) Experiment beam time ER: experiment ready PCC: planned configuration change (when beam is masked while radiators are moved, DAQ (roc rebooting, restarting runs)), if more than 5 minutes, put a short comment, eg harp scans or DAQ. UED: unplanned experiment down (hardware failure) In case of other questions or uncertainties of what to do, call the RC or PDL (remote) shift worker: see dedicated Worker Shift tab above.

For REMOTE Shifts (offsite): Zoom for 24-7 communication with counting house: https://jlab-org.zoomgov.com/j/1619881100 Passcode REQUIRED: 927417 Remind the expert in the counting house to restart their zoom, if necessary Remote VNC connection instructions: https://logbooks.jlab.org/entry/3906039 All necessary applications should be avaible from the desktop menu (left/right click on the desktop) EPICS GUIs should be accessed ONLY via the desktop menu or by running clascss-remote. Remote Demonstration Video (150 MB) Shift Worker Tasks Every Run: With beam present, log screen shots of: Beamline Overview, in VNC or Web Browser RGC Polarized Target GUI - under Beamline on CSS Screen Shot of RasterMon (use "Logbook Entry" functionality on CSS) CLAS12 Trigger rates and DAQ status upload monitoring plots (mon12) to logook look at the spectra: Reference, current, and 5 most recent runs, choose a reference run (the reference numbers refer to logbook entries): In particular, take note of the new Raster Monitoring interface - see "Monitoring" Tab. Every Shift: Fill the shift checklist Log screen shots of RICH temperature and scaler maps. Log in HBLOG and RICH logbook. Regularly: reset & check spectra frequently (every 30 - 60 minutes) Some plots in mon12 have a choice of histogram sets per sector, select buttons at the bottom of the plot. Only the currently selected set ends up in the logbook entry. that means you have to look at all sectors for these histograms in Web Browser: Upstream/Midstream Halo Counters, Downstream Halo Counters, Beam Currents, BPM Positions

Backup shifter contact info Name Email Cell phone Bob Cat bob@cat.org John Doe johndoe@gmail.com

Webcams Tagger Beam Dump Viewer Hall Fisheye Faraday Cup beam viewer To reboot it, run beam-viewer-reboot Hall Cameras: Hall A, Hall B, Hall C, Hall D

Manuals CED Manual MON12 Manual RasterMon Manual off-line Manual

Epics on the web Hall B WebOPI (CUE Login) Accelerator

Live Monitoring Links CLAS12 Monitoring Timelines Live Charge Collected Plots

Hall-B Operation Safety Procedures Run Group C Analysis Wiki RCDB CLAS12 mon page Comparison between mon12 histograms (last 5 runs plus reference run)

Accelerator Accelerator Whiteboard Program Deputy Shift Plans Run Coordinator Reports Beam Time Accounting Reports

ZOOM meetings 07:45 RC/PD Morning Meeting 08:00 MCC/OPS Morning and Wednesday 1:30 Meeting See also this log entry 14:00 Daily RC Meeting Zoom Link Meeting ID: 160 867 4253 Passcode: 786506 Meeting Agendae