Difference between revisions of "The HPS Run Wiki"

From hps run
Jump to navigation Jump to search
Line 122: Line 122:
  
 
=== When beam is back ===
 
=== When beam is back ===
−
<!--# <strike>Log screenshots of the ECal and main HPS scaler screens for reference when the beam is established at the tagger</strike>
 
−
== Bring beam to FC ==
 
−
# '''<font color=red> Important Note: Before bringing beams to FC, make sure that the SVT, Hodoscope, and ECal are off, SVT is fully retracted, the target is out. If this is a first time that beam goes to FC after machine settings have changed then the SVT protection collimator position relative to the beam trajectory is unknown and therefore HPS protection collimator must be retracted.</font>'''
 
−
# '''Ask for 10 nA beam. When the beam sent to FC, it should be clearly visible on the downstream viewer. The halo counter rates downstream of the HPS, HPS-SC, and HPS-T should not be more than 10s of kHz. All upstream halo counters must be in the range of <100Hz.'''
 
−
#'''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.''' -->
 
 
# Establish beam to the Faraday cup following the "General Guidelines" and Beamline Procedures. The required beam profile at 2H02A harp is X-width <~0.10 mm, Y-width <~ 0.060 mm
 
# Establish beam to the Faraday cup following the "General Guidelines" and Beamline Procedures. The required beam profile at 2H02A harp is X-width <~0.10 mm, Y-width <~ 0.060 mm
 
See "General Instructions" on the right for details
 
See "General Instructions" on the right for details
Line 136: Line 131:
 
# Restore ECal and Hodoscope
 
# Restore ECal and Hodoscope
 
#*  Turn on HVs on 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
 
−
# Turn on the chicane ''' beam must be OFF ''', use "Chicane" GUI to set correct currents on the magnet (see instructions) -->
 
 
#* Check the ECal and hodoscope rates without a target at 50 nA, make a snapshot of the sacaler GUIs for both detectors and send to the logbook. Make note of the highest rate position on ECal.
 
#* Check the ECal and hodoscope rates without a target at 50 nA, make a snapshot of the sacaler GUIs for both detectors and send to the logbook. Make note of the highest rate position on ECal.
 
#* Insert the 4 um W 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.
 
#* Insert the 4 um W 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.
−
#* <strike>Check ECal and hodoscope rates as a function of the target position. Starting from the nominal position of the 4 um foil, move the target ladder towards 8 um W foil with 0.5 mm steps using expert GUI. Record target position and the ECal and hodooscope scaler rates. </strike>
+
# Continue ECal/hodoscope and trigger rate, and FSD thresholds/rates studies with 4 um W target and up to 400 nA beam. '''Note: thresholds on FSD must be changed while scanning'''. Record rates in the logbook. Call beamline expert if needed.
−
# Setup FSD thresholds/rates and ECal/hodoscope rates using 4 um W target to up 400 nA beam. '''Note: thresholds on FSD must be changed while scanning'''. Record rates in the logbook. Call beamline expert if needed.
+
<!--# Call ECal and DAQ expert to perform pedestal run and DAQ/trigger studies-->
−
# Call ECal and DAQ expert to perform pedestal run and DAQ/trigger studies
+
#* Run 30 min for each current setting, starting 100 nA and go with 50 nA steps. Record:  
−
#* Trigger/DAQ expert checks trigger rates, DAQ, and deadtime with 30-50 nA beam on 4 um target. Record:  
 
 
#*# ''main scaler screen''
 
#*# ''main scaler screen''
 
#*# ''ecal scaler gui''
 
#*# ''ecal scaler gui''
 
#*# ''trigger rate gui''  
 
#*# ''trigger rate gui''  
−
#*#* Live time should be >~90%
+
#*#* Live time  
−
#*#* Total Trigger rate should be ~17 kHz.
+
#*#* Total Trigger rate
 
#*  The DAQ Configuration:  
 
#*  The DAQ Configuration:  
 
#*# without and with SVT '''<tt>PROD66__NOSVT and PROD66</tt>''', respectively  
 
#*# without and with SVT '''<tt>PROD66__NOSVT and PROD66</tt>''', respectively  

Revision as of 16:06, 18 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

* !! 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.


Run Plan June 17 - 18, 2019

When beam is back

  1. Establish beam to the Faraday cup following the "General Guidelines" and Beamline Procedures. The required beam profile at 2H02A harp is X-width <~0.10 mm, Y-width <~ 0.060 mm

See "General Instructions" on the right for details

  1. Ask for beam current ~50 nA beam and with SVT expert perform SVT wire scan to find the position of the beam relative to SVT
    • If beam position needs to be adjusted, work with MCC ops to move it to the desired position using position reading on 2H02 BPM. If adjustment is in the vertical direction, then with beam motion the SVT collimator must be moved as well. Steps of the motion must be the order of 0.2 mm, so if you need to move beam vertically by 1 mm, it will take 5 motions beam-then-collimaotr to get there.
    • After adjusting the beam position, perform SVT wire scan again to verify that beam is in the correct spot. If needed, adjust it
    • After finishing beam positioning, record BPM values, send the scaler GUI to the logbook, perfomr 2H02 harp scan, record results.
  2. Restore ECal and Hodoscope
    • Turn on HVs on ECal and Hodoscope
    • Check the ECal and hodoscope rates without a target at 50 nA, make a snapshot of the sacaler GUIs for both detectors and send to the logbook. Make note of the highest rate position on ECal.
    • Insert the 4 um W 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.
  3. Continue ECal/hodoscope and trigger rate, and FSD thresholds/rates studies with 4 um W target and up to 400 nA beam. Note: thresholds on FSD must be changed while scanning. Record rates in the logbook. Call beamline expert if needed.
    • Run 30 min for each current setting, starting 100 nA and go with 50 nA steps. Record:
      1. main scaler screen
      2. ecal scaler gui
      3. trigger rate gui
        • Live time
        • Total Trigger rate
    • The DAQ Configuration:
      1. without and with SVT PROD66__NOSVT and PROD66, respectively
      2. Trigger file: hps_v1.trg

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.

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
    • If HPS chicane must be ON, make sure 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 don'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 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
    • Follow the instructions under "Procedures" on the documentation tab for "Beamline"[8] to establish beam to the electron dump.

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 2H01A and 2H02A harps. The required beam profile at 2H02A harp is: X-width <~0.05 mm, Y-width <~ 0.05 mm. Beam profile using 2H01A and 2H02A harps with previous scans ([9],[10]) to compare.
    • 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 [11]
    • Positions on BPMs must be close to what they were before [12]
    • Once all the above is achieved, turn ECAL and Hodoscope 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
June 01-05 Tim Nelson
June 01-07 Cameron Bravo
June 07-11 Omar Moreno
June 12 Omar Moreno and Matt Solt
June 12-19 Vitaliy Fadeyev
June 13-18 Matt Solt
June 19-26 Omar Moreno
June 26-July 03 Cameron Bravo
July 03-10 Tim Nelson
July 10-17 Omar Moreno
July 17-24 Cameron Bravo
July 24-31 Tim Nelson
July 31-August 07 Matt Graham
August 07-14 Matt Solt
August 14-21 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


Svtpic.png

Ecalpic.png

Retrieved from "https://wiki.jlab.org/hps-run/index.php?title=The_HPS_Run_Wiki&oldid=1661"