Difference between revisions of "Engineering Run"

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* While taking data, monitor routinely trigger scalers (make sure all bits in the first column of the table are non-zero, see https://logbooks.jlab.org/entry/3518829 as an example), live time, monitoring histograms, CED, detector scalers.
 
* While taking data, monitor routinely trigger scalers (make sure all bits in the first column of the table are non-zero, see https://logbooks.jlab.org/entry/3518829 as an example), live time, monitoring histograms, CED, detector scalers.
  
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== <font color=blue>''' Beam Tuning:'''</font>==
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<!-- == <font color=blue>''' Beam Tuning:'''</font>==
 
   
 
   
 
* <b>Whenever preparing to receive beam, make sure the following conditions are established: all CLAS12 detectors are off and target is empty. Turn DC HV off, leaving LV on. For SVT, MVT, FTH and FTT, first turn HV off and then LV off. For any problem, consult with the expert-on-call.</b>
 
* <b>Whenever preparing to receive beam, make sure the following conditions are established: all CLAS12 detectors are off and target is empty. Turn DC HV off, leaving LV on. For SVT, MVT, FTH and FTT, first turn HV off and then LV off. For any problem, consult with the expert-on-call.</b>
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When ready to get beam, turn all beamline devices ON, turn all CLAS12 detectors OFF
 
When ready to get beam, turn all beamline devices ON, turn all CLAS12 detectors OFF
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Revision as of 11:47, 24 January 2018

[edit]
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 this page to force a refresh.


CLAS12 Engineering Run, Winter 2018
Beam energy 2.1 GeV (1 pass)
Important: Document all your work in the logbook!
Remember to fill in the run list at the beginning and end of each run (clas12run@gmail.com can fill the run list)

RC: Raffaella De Vita

  • (757) 575-7540
  • 9 575 7540 from Counting Room
  • devita@jlab.org

PDL: Eugene Pasyuk

  • (757) 876-1789
  • 9 876-1789 from Counting Room
  • pasyuk@jlab.org


  • Note 1: Be very mindful of the background rates in the halo counters, rates in the detectors, and currents in the SVT for all settings to ensure that they are at safe levels.
  • Note 2: At the end of each run, follow the DAQ restart sequence "end run", "abort", "reset", "download", "prestart", "go". After DAQ prestart is complete reboot the scaler IOCs with the command: iocjscalerRestartAll.sh. Note: After each step, make sure it is complete in the Run Control message window. If a roc has crashed, find which one it is and issue a roc_reboot command and try again. Contact the DAQ expert if there are any questions.
  • Note 3: Nominal beam positions: 2C21 (X=0.0 mm, Y=0.0 mm), 2C24 (X=0.0 mm, Y=0.7 mm), 2H01 (X=0.7 mm, Y=-0.5 mm)

Run Plan:

(last update 1/24 - 10:00 am)

  • Once work in the Hall is complete, ramp the solenoid up to -100% (RC or PDL will do it). Once solenoid is at field, ramp torus to +60% (inbending electrons).
  • Ask MCC to ramp the tagger magnet up to prepare for beam tuning.
  • When MCC will inform you that they are ready to send beam, turn most sensitive detectors off including trackers (SVT, MVT, FTT, DC), Central Detectors (CTOF, CND) and RICH: refer to the manuals or call the experts for any questions.
  • Prepare to re-establish beam following the "Establish-physics quality beam" procedure at [1]. Consult with the beamline expert in case of issues.
  • Once beam is tuned to the FC, switched all detectors on. Call the SVT expert to switch the SVT on. Restore DC HV setting to be (8,9,9) for Region 1, 2 and 3, respectively. Refer to https://logbooks.jlab.org/entry/3519236 for the procedure. Compare the values displayed in the GUI with what reported in the table on pg. 5 and 6 of the DC manual at [2] to ensure the settings are correct. Contact the DC expert or the RC if needed.
  • Make sure FSD threshold are set correctly for the specific beam current used in the following runs.
  • Start data taking at 60% field (negatives inbending) and solenoid to -100% field:
    • Test production run: 5 nA beam current on LH2 target, DAQ configuration PROD (selected by clicking on Configure before the Download), trigger file tr_electron_2gev_lt.trg (selected at the Download), beam position as indicated above; Take 30 min of data. Record trigger scaler gui.
    • Test production run: 5 nA beam current on LH2 target, DAQ configuration PROD (selected by clicking on Configure before the Download), trigger file tr_electron.trg (selected at the Download), beam position as indicated above; Take 30 min of data. Record trigger scaler gui.
    • Special Run #1 (Random): 10 nA beam current on LH2 target, DAQ configuration PROD (selected by clicking on Configure before the Download), trigger file random_2gev_lt.trg (selected at the Download), beam position as indicated above; call Rafayel Paremuzyan (757-753-7769) 30 min. before starting the run, as he will come to the Counting house or connect remotely to check that settings are correct and all trigger information written to the data stream. Take 50 M events.
    • Special Run #2 (Random): 10 nA beam current on LH2 target, DAQ configuration PROD (selected by clicking on Configure before the Download), trigger file random_tr.trg (selected at the Download), beam position as indicated above. Take 50 M events.
    • Special Run #3 (DC HV scan): 5 nA beam current on LH2 target, DAQ configuration PROD (selected by clicking on Configure before the Download), trigger file tr_electron.trg (selected at the Download), beam position as indicated above; take 3 short runs (20 min.) with different DC HV settings (7,8,8), (9,10,10), (10,11,11) as detailed in https://logbooks.jlab.org/entry/3519236. Every time the HV settings are changed use the DC HV Monitoring GUI (from the main Epics GUI select DC-> DC HV Monitoring) to check that the HV settings are correct; compare the values displayed in the GUI with what reported in the table on pg. 5 and 6 of the DC manual at [3]. Once completed, set DC HV at the nominal settings (8,9,9).
    • Production: 5 nA beam current on LH2 target, DAQ configuration PROD (selected by clicking on Configure before the Download), trigger file tr_electron.trg (selected at the Download), beam position as indicated above; Take 2 hours runs till 7 am.
    • Special Run #4 (MIPS): at 7 am, 2 nA beam current on LH2 target, DAQ configuration PROD2 (selected by clicking on Configure before the Download), trigger file trg_mips_PCAL.trg (selected at the Download), beam position as indicated above; adjust the beam current to have a trigger rate not greater than 15 kHz and live time not less than 50%); take one hour of data.
    • Production: 5 nA beam current on LH2 target, DAQ configuration PROD (selected by clicking on Configure before the Download), trigger file tr_electron.trg (selected at the Download), beam position as indicated above; Take 2 hours runs untill beam will be terminated for the pass change to 10.6 GeV.
  • While taking data, monitor routinely trigger scalers (make sure all bits in the first column of the table are non-zero, see https://logbooks.jlab.org/entry/3518829 as an example), live time, monitoring histograms, CED, detector scalers.

General Instructions:

  • For a given beam current, compute the FSD thresholds according to the Establish Physics Quality Beam document. Call MCC to update the values. Contact the beamline expert if there are questions about setting the FSD thresholds.
  • The main lights in the Hall (dome lights) and the Forward Carriage lights are being kept off because of light leaks affecting some of the detectors. If these lights are switched on during an access, they should be switched off when leaving the Hall. Note that the dome lights when switched off cannot be turned back on immediately because they require 10-15 min to cooldown.
  • Do not run more than 60 minutes above 30 nA with 5-pass beam without the beam blocker in front of Faraday cup. Put beam blocker in for long running at high currents for 5 pass operations.
  • Turn DC HV off only for beam tuning; if no beam is available or when beam is stable, keep them on even if you are not taking data.
  • In case of loss of communication with IOCBTARG, follow instructions at https://logbooks.jlab.org/entry/3502218
  • With any issue contact On-Call Experts or RC - do not spend more than 15-20 min trying to fix the problem.
  • All jscaler iocs (iocjscalerX) on the health screen (under DAQ tab) must be restarted after every DAQ prestart is completed.
  • Check that no unecessary beamline-related screens are open. This includes particularly the big beamline overview screen, but also and any motor/harp/collimator screens, and ioc health screens.

Every Shift:

  1. Follow run plan as outlined by RC
  2. If any concern about beam stability, ask MCC if orbit locks are on (they should be).
  3. Keep shift summary up to date in HBLOG. Record all that happens.
    • Check on white board all scalers, strip charts and monitoring plots that need to be logged regularly
    • Document any beam condition change and send scaler GUIs to HBLOG
    • Fill out BTA hourly. Click "Load from EPICS" to automatically fill the left side.
    • Fill and submit the shift checklist in the logbook
  4. Perform 2H01A harp scan once per shift or when beam conditions have changed, based on beam monitors (BPMs, halo rates, beam-viewer). During harp scans the HV for DC and HTCC should be OFF.

Every Run:

  1. Log screenshots of:
    • main scaler GUI display
    • Detector occupancy plots
    • Trigger rate gui
    • Beam strip charts


Clas12design.png

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