Difference between revisions of "The HPS Run Wiki"

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#'''First find the position of the collimator by performing the collimator wire scan. The current position of the wire for beam center is 4.41 (labeled on the GUI), if the measurement finds beam center at a different position use the expert GUI to set the 3.94 mm SVT collimator to the right position (current position is 6.212, which means that the distance between the wire and the center of the 3.94 mm hole is 1.802). After collimator is in place all beam studies should be done in these conditions with beam currents of 30 nA.''' -->
 
#'''First find the position of the collimator by performing the collimator wire scan. The current position of the wire for beam center is 4.41 (labeled on the GUI), if the measurement finds beam center at a different position use the expert GUI to set the 3.94 mm SVT collimator to the right position (current position is 6.212, which means that the distance between the wire and the center of the 3.94 mm hole is 1.802). After collimator is in place all beam studies should be done in these conditions with beam currents of 30 nA.''' -->
 
<!--# '''Note: in order to have reliable readings on two important for HPS BPMs, 2H00 and 2H02, beam current should be >30 nA. Before moving forward with 2H02A harp scans and beam profile tune, make sure orbit lock is engaged at positions on 2H00(X=0.00,Y=0.00) and on 2H02(X=-1.1,Y=-1.). '''-->
 
<!--# '''Note: in order to have reliable readings on two important for HPS BPMs, 2H00 and 2H02, beam current should be >30 nA. Before moving forward with 2H02A harp scans and beam profile tune, make sure orbit lock is engaged at positions on 2H00(X=0.00,Y=0.00) and on 2H02(X=-1.1,Y=-1.). '''-->
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# Establish beam to the Faraday cup following the "General Guidelines" on the right. The required beam profile at 2H02A harp is X-width <~0.05 mm, Y-width <~ 0.050 mm, and the tilt angle <15 degrees. The spot on the Chromax viewer should be close to x=-2mm, y=-5mm. Also, make sure that Harp scans reproduce recent mean values of Beam X and Y [https://logbooks.jlab.org/entry/3388464]. Vertically should be within 50 um match, horizontally 300 um should be enough.
+
# Establish beam to the Faraday cup following the "General Guidelines" and Beamline Procedures. The required beam profile at 2H02A harp is X-width <~0.05 mm, Y-width <~ 0.050 mm
 
# Restore ECal and Hodoscope
 
# Restore ECal and Hodoscope
 
#* Turn on HVs on ECal and Hodoscope
 
#* Turn on HVs on ECal and Hodoscope

Revision as of 05:41, 16 June 2019


[edit]

HPS 2019 run, June X to August Y'
Beam energy 4.5 GeV
Important: Document all your work in the logbook!
Bluejeans for Run Meetings on DAY and DAY at 2pm

RC: Stepan Stepanyan

  • (757) 575-7540
  • 9 575 7540 from Counting Room

PDL: Valery Kubarovsky

  • (757) 876-1789
  • 9 876-1789 from Counting Room


Run Plan June 15 - 17, 2019

Close the Hall at the beginning of the swing shift after everyone is out and MCC is ready to sweep

  • If after the sweep MCC is not ready to send a beam to Hall-B, keep the hall in control access for people still doing work on detectors.

* !! Chicane magnets can be energized only when the hall is in Beam Permit, [1]. Chicane magnets must be off if the hall is in Restricted or in Controlled access.

* The vacuum gauge used in SVT interlock (2H03) is broken. Watch the gauge 2H02, in case of a vacuum event valves will close and the beam will be shut-off. If the event is at 2H02 (loss of vacuum near HPS chamber) call SVT expert immediately and follow his/her instruction.

  1. Establish beam to the Faraday cup following the "General Guidelines" and Beamline Procedures. The required beam profile at 2H02A harp is X-width <~0.05 mm, Y-width <~ 0.050 mm
  2. Restore ECal and Hodoscope
    • Turn on HVs on ECal and Hodoscope
    • Record FADC rates without the target, make a snapshot of the sacaler GUIs for both detectors and send to the logbook with notes on the position of the highest rates in ECal that show beam position at ECal
  3. Turn on the chicane, use "Chicane" GUI to set correct currents on the magnet (see instructions)
    • Check the ECal and hodoscope rates without the target at 50 nA, make a snapshot of the sacaler GUIs for both detectors and send to the logbook. Make note the highest rate position on ECal.
    • Insert the 4 um target and check ECal and hodoscope rates at 50 nA. Make a snapshot of the sacaler GUIs for both detectors and send to the logbook.
  • Call ECal expert to perform pedestal run
    • Trigger/DAQ expert checks trigger rates, DAQ, and deadtime with 50 nA beam on 4 um target. Record:
      1. main scaler screen
      2. ecal scaler gui
      3. trigger rate gui (requires DAQ Prestarted with v8_200nA.trg)
        • Live time should be >~90%
        • Total Trigger rate should be ~17 kHz.

Important Notes:

  1. Do not run more than 60 minutes above 30 nA without the beam blocker in front of Faraday cup. Put beam blocker in for long running at high currents.

SVT RECOVERY PROCDURES

General Instructions

DAQ RECOVERY

If DAQ crashed/broken:

  1. For every daq crash login into clondaq3 as a clasrun then run the following command
    • clasrun@clondaq3:clasrun> save_DAQ_logs.pl (See [2])
  2. Reboot DAQ completely..
  3. If the procedure fails to restore DAQ, call Sergey (DAQ on call) without any further disturbing the DAQ status.

Establishing Physics Quality Beam for HPS:

  1. Make sure SVT is retracted and both SVT and ECAL are OFF.
  2. First send beam to the tagger dump:
    • Check that beam type is set to "Photon" (HPS_EPICS->Beam->BTA).
    • Position "Blank" on the beam for the Hall-B collimator
    • Ask MCC to turn ON the tagger magnet and then deliver <10 nA beam to the tagger dump.
    • Check the beam position on the tagger viewer, it should be approximately in the center of the screen
    • Follow instructions under "Procedures" on the documentation tab for "Beamline"[3]. To tune the beam on tagger dump and perform harp scans beam current should be <10 nA.
    • Check profile using 2C21 and tagger harp scans, and compare the positions and widths with previous scans ([4],[5])
      • Positions on both harps should be within 1mm
      • Width on 2C21 should be <~0.1+/-0.05 mm
      • Width on tagger harp (2C24) <~0.35 +/- 0.1mm
    • Halo counters UPS-L/R and TAG-L/T/T2 should be ~few Hz/nA [6]
  3. Before sending a beam to the Faraday cup
    • Check that chicane GUI says "Chicane Ready"
    • Check that SVT protection collimator is ON
    • HPS target is OUT and ECAL HV is OFF
    • SVT is OUT (position=0.000 mm in main hps scaler screen) and HV is off (all red/green indicators RED in SVT bias GUI)
    • If any uncertainty, page the experts
    • The first time sending a beam to the Faraday cup after the hall is closed, page the SVT expert.
    • Pay attention into following corrector values: 2C22H, 2C23V, 2H00H, 2H00V, Compare them to ones that are in [7]. Make sure their values doesn't differ more than 100%. If there is such difference, tell MCC about this.
  4. Send beam to the Faraday cup
    • If the beam optics is correct, then you should immediately see the beam spot on the Downstream Viewer and beam position and on 2H00 and 2H02 BPMS.
    • If you don't see it immediately, and rates on halo counters are more than 100 Khz, then ask MCC, to change to pulsed (tune mode) beam, and ask to put corrector values. At this point don't accept any CW beam, until beam spot is visible on Downstream Viewer.
    • If MCC operator is not able to tune the beam more than 30 minutes, then please notify RC

Note: in order to have reliable readings on two important for HPS BPMs, 2H00 and 2H02, beam current should be >30 nA.

    • Ask MCC to establish 30 nA beam with HPS orbit locks on (We need HallBHPSOrb not HallBOrb configuration). For orbit lock positions on 2H00(X=0.00,Y=0.00) and on 2H02(X=-1.00,Y=-0.85). Use the 2.82 mm SVT collimator. .
    • Tune beam profile at HPS using measured widths on 2H02A harp. The required beam profile at 2H02A harp is: X-width <~0.25 mm, Y-width <~ 0.10 mm for commissioning, and Y-width ~0.05 for physics running, and the tilt angle <15 degrees.
    • Check and log the beam spot on chromax viewer
    • The halo counter rates before HPS must be low:
      1. UPS-L and UPS-R few Hz/nA,
      2. The tagger counters should count less than Hz/nA and downstream counters should count ~Hz/nA
      3. The halo counter rates on HPS, HPS-L/R/T/SC, depends on the collimator and HPS chicane settings, but should not be more than 100 Hz/nA [8]
    • Positions on BPMs must be close to what they were before [9]
    • Once all the above is achieved, turn ECAL HV ON to monitor and log ECal rates
    • Insert the 4um W target without turning off the beam.
  2. Before accepting beam, make sure all the previous conditions are met. Always read previous log entries, compare settings of BPMs and correctors with previous settings using scaler_hps GUI.

Setting up the FSD threshold

  • When you are about to calculate FSD limit, it means the beam is already established, and the target is in.
  • To calculate the FSD threshold run the following executable
hpsrun@clonpc11> /home/hpsrun/scripts/FSD/Calc_FSD_Threshold.exe
  • Note we use 1 ms integration time and want 5.5 sigma away from the average rates
  • Allowed tolerable rate increase default is 15%, if that causes many trips, then contact RC, he might suggest to increase that number
  • Make sure if MCC operator set the FSD limit and integration time correctly


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 2H02A harp scan once per shift or when beam conditions have changed, based on beam monitors (BPMs, halo rates, beam-viewer). During harp scans SVT must be retracted and HV should be OFF.
  5. With any issue contact On-Call Experts or RC

Every Run:

  1. After "Go": Check SVT Occupancy
  2. Update the Run Spreadsheet
  3. Log screenshots of:
    • main scaler_hps display
    • ECAL FADC rate gui
    • Trigger rate gui
    • SVT and ECAL Monitoring pdfs
    • Put the output of the following command hpsTiStatus.sh into the logbook
  4. After each run execute this script (replace RunNb by the actual run number):
    • hps2tapeAndDelete.sh RunNb
  5. All trigger files to be used by shifters are in HPS/Run2016


RC daily meetings at 2 pm in the counting-house 2nd-floor conference room.

BlueJeans Info:

URL: https://bluejeans.com/794825703

Meeting ID: 794825703


Run Coordinator
June 12 - June 19 Stepan Stepanyan
June 19 - June 26 Matt Graham
June 26 - July 3 Tim Nelson
July 3 - July 10 Takashi Maruyama
July 10 - July 17 Stepan Stepanyan
July 17 - July 24 Rafayel Paremuzyan
July 24 - August 7 Maurik Holtrop
August 7 - August 14 Raphael Dupre
August 14 - August 21 Stepan Stepanyan
Physics Division Liaison
HPS-2019 Valery Kubarovsky
Beamline
June 12 - June 19 Rafo Paremuzyan
June 19 - July 29 Stepan Stepanyan
July 29 - August 18 Rafo Paremuzyan
SlowControls
June 12 - Augus 19 Nathan Baltzell
DAQ
24/7/365 Sergey Boyarinov
ECAL/HODOSCOPE
June 12 - July 1 Nathan Baltzell
July 1 - July 8 Raffaella DeVita
July 8 - July 15 Rafayel Paremuzyan
July 15 - July 22 Andrea Celentano
July 22 - July 29 Rafayel Paremuzyan
July 29 - August 5 Raphel Dupre
August 5 - August 19 Gabriel Charles
SVT
XXX - YYY Cameron Bravo
Matt Solt


System/Person Pager/Phone Number
Run Coordinator (757) 575-7540 (cell)
Physics Div. Liaison (757) 876-1789 (cell)
MCC-OPS 7048
Crew Chief 7045
Crew Chief 9-879-3367 (cell)
Program Deputy 9-876-7997 (cell)
Gate House Guard 5822
DAQ/Online (757) 869-2188 (cell)
SVT (757) 310-7198 (cell)
ECAL (757) 810-1489 (cell)
Slow Controls (757) 748-6922 (cell)
Beamline (757) 303-3996 (cell)
Engineering (757) 748-5048
Hall-B Floor 5165
Hall-B Space Frame 5170, 5171
Hall-B Forward Carriage 5371
Hall-B Counting Room 5126, 5244, 5246, 5247
Hall-B Gas Shed 7115


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