Difference between revisions of "Engineering Run"

From clas12-run
Jump to: navigation, search
(Short Term Schedule)
(Short Term Schedule)
Line 97: Line 97:
 
*# ask MCC to degauss and turn the tagger dipole off;
 
*# ask MCC to degauss and turn the tagger dipole off;
 
*# position 20 mm collimator on the beam and move \Chromox" screen of the downstream viewer in beam position (if it is not already)
 
*# position 20 mm collimator on the beam and move \Chromox" screen of the downstream viewer in beam position (if it is not already)
 +
*# move the beam blocker out: in this configuration beam current readings at 2C24, 2H01 and Faraday Cup should be close.
 
*# ask for <= 1 nA, positions, quads settings and rates should be as in https://logbooks.jlab.org/entry/3502404; pay particular attention to halo counter rates: if very different from what shown in the link, call MCC and ask them to verify their settings; note that BOM gains were lowered today and rates should be lower (see https://logbooks.jlab.org/entry/3502559).
 
*# ask for <= 1 nA, positions, quads settings and rates should be as in https://logbooks.jlab.org/entry/3502404; pay particular attention to halo counter rates: if very different from what shown in the link, call MCC and ask them to verify their settings; note that BOM gains were lowered today and rates should be lower (see https://logbooks.jlab.org/entry/3502559).
*# make sure beam is stable, beam spot is clearly visible on the chromax viewer nd current does not exceed 1 nA;
+
*# make sure beam is stable, beam spot is clearly visible on the chromax viewer and current does not exceed 1 nA;
 
*# repeat harp scans at 2c21, 2c24 (tagger harp) and 2h01: profile should be as in https://logbooks.jlab.org/entry/3502250, https://logbooks.jlab.org/entry/3502252 and https://logbooks.jlab.org/entry/3502313. Make sure you select the proper PMT for the analysis. The profile at 2c21a and 2c24 should be as in the scans performed with beam to the tagger. If necessary ask MCC to adjust the beam profile at 2H01 to match the previous scan.  
 
*# repeat harp scans at 2c21, 2c24 (tagger harp) and 2h01: profile should be as in https://logbooks.jlab.org/entry/3502250, https://logbooks.jlab.org/entry/3502252 and https://logbooks.jlab.org/entry/3502313. Make sure you select the proper PMT for the analysis. The profile at 2c21a and 2c24 should be as in the scans performed with beam to the tagger. If necessary ask MCC to adjust the beam profile at 2H01 to match the previous scan.  
* once beam tuning is complete ask for 1.5 nA and ask MCC to unmask the FSD.
+
* once beam tuning is complete move the beam blocker in (beam should be off for this), ask for 1.5 nA and ask MCC to unmask the FSD.
 +
* ask MCC to use BPM current readings from 2H01 for current lock (see https://logbooks.jlab.org/entry/3502484)
 
* turn on the forward carriage detectors: EC, PCAL, FTOF; check rates and record them in the logbook;
 
* turn on the forward carriage detectors: EC, PCAL, FTOF; check rates and record them in the logbook;
 
* if rates are consistent with previous, proceed to turning on LTCC, DC, HTCC;
 
* if rates are consistent with previous, proceed to turning on LTCC, DC, HTCC;

Revision as of 20:02, 11 December 2017

[edit]
Person Phone Number
Run Coordinator 9-757 575-7540 (cell)
Physics Division Liaison 9-757 876-1789 (cell)
Shift Expert 5244 or 9-757 329-4846 (cell)
Shift Worker 5126
MCC-OPS 7048
Crew Chief 7045
Crew Chief 9-757 876-3367 (cell)
Program Deputy 9-757 876-7997 (cell)
Engineering on-call 9-757 748-5048 (cell)
Engineering on-call secondary 9-757 897-9060 (cell)
Radcon (needed for target cell swaps) 9-757 876-1743 (cell)
Gate House Guard 5822
Location Phone Number
Hall-B Floor 5165
Hall-B Space Frame 5170, 5171
Hall-B Forward Carriage 5371
Hall-B Counting Room 5245 (Shift1), 5126 (Shift2)
Hall-B Counting Room 5244 (Expert)
Hall-B Gas Shed 7115
System Phone Number On-Call Person
DC (757) 748-5048 (cell) Engineering On-Call
SVT + MM (757) 541-7539 (cell) Yuri Gotra Primary
SVT + MM (757) 753-7769 (cell) Rafo Paremuzyan (secondary)
ECAL (757) 810-1489 (cell) Cole Smith
FTOF/CTOF (757) 344-7204 (cell) Jose Carvajal
CND (757) 344-7204 (cell) Jose Carvajal
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) Valery Kubarovsky
DAQ (757) 232-6221 (cell) Sergey Boiarinov
Slow Controls (757) 748-6922 (cell) Nathan Baltzell
Beamline (757) 303-3996 (cell) Eugene Pasyuk
Pol. Target On-Call (757) 218 2266 (cell) Tsuneo Kageya
Polarized Target (757) 746-9277 (cell) Chris Keith
Polarized Target (757) 897-1415 (cell) James Maxwell
Polarized Target (757) 871-5374 (cell) James Brock
Target (not used) (757) 822-9586 (cell) Bob Miller Primary
Target (not used) (757) 897-9060 (cell) Denny Insley Secondary
Counting House C x6000
Counting House D x5504

In case of a problem with superconducting magnets call Engineering on-call first, particularly if it is related to cryo.
For all other superconducting magnet problems call magnet group.
Their schedule and phone numbers are posted on the wall next to the Saclay target computer.




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


CLAS12 Engineering Run, Fall 2017
Beam energy 10.6 GeV (5 pass)
Important: Document all your work in the logbook!

RC: Raffaella DeVita

  • (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

Run Plan:

  • Whenever preparing to receive beam, make sure the following conditions are established: all CLAS12 detectors are off and target is empty. For SVT, MVT, FTH and FTT, turn first HV off and then LV off. For any problem, consult with the expert-on-call.
  • Establish beam to the tagger yoke first:
    1. ask MCC to energize the tagger dipole magnet and set the current as needed for dumping the beam in the designated dump on the tagger yoke. MCC will ask you to change (set) the beam delivery mode.
    2. position the \blank" collimator on the beam (this is a collimator block, 30 cm long Ni cylinder, without a hole)
    3. when the tagger magnet is at required setting ask MCC if they are ready to deliver beam to the tagger yoke dump (<=5 nA). It may take ~1 hour for MCC to setup and cleanly transport beam to the tagger yoke dump.
    4. perform harp scans using the wire harp at 2C21 girder and 2c24 (tagger harp). Beam profile, peak position, width and signal/background ratio should be like in https://logbooks.jlab.org/entry/3502250 and https://logbooks.jlab.org/entry/3502252. Ask MCC to retune if needed (e.g. beam is too wide or asymmetric or has large tails),repeat the scan after every tune. Iterate to get acceptable beam profile.
  • send the beam to Faraday Cup dump (otherwise known as electron dump).
    1. CLAS12 detectors should be OFF, the solenoid magnet current is at 50% its max, torus is at 100%.
    2. ask MCC to degauss and turn the tagger dipole off;
    3. position 20 mm collimator on the beam and move \Chromox" screen of the downstream viewer in beam position (if it is not already)
    4. move the beam blocker out: in this configuration beam current readings at 2C24, 2H01 and Faraday Cup should be close.
    5. ask for <= 1 nA, positions, quads settings and rates should be as in https://logbooks.jlab.org/entry/3502404; pay particular attention to halo counter rates: if very different from what shown in the link, call MCC and ask them to verify their settings; note that BOM gains were lowered today and rates should be lower (see https://logbooks.jlab.org/entry/3502559).
    6. make sure beam is stable, beam spot is clearly visible on the chromax viewer and current does not exceed 1 nA;
    7. repeat harp scans at 2c21, 2c24 (tagger harp) and 2h01: profile should be as in https://logbooks.jlab.org/entry/3502250, https://logbooks.jlab.org/entry/3502252 and https://logbooks.jlab.org/entry/3502313. Make sure you select the proper PMT for the analysis. The profile at 2c21a and 2c24 should be as in the scans performed with beam to the tagger. If necessary ask MCC to adjust the beam profile at 2H01 to match the previous scan.
  • once beam tuning is complete move the beam blocker in (beam should be off for this), ask for 1.5 nA and ask MCC to unmask the FSD.
  • ask MCC to use BPM current readings from 2H01 for current lock (see https://logbooks.jlab.org/entry/3502484)
  • turn on the forward carriage detectors: EC, PCAL, FTOF; check rates and record them in the logbook;
  • if rates are consistent with previous, proceed to turning on LTCC, DC, HTCC;
  • turn on CTOF and CND; if rates are acceptable, contact M. Defurne and Y. Gotra to turn on MVT and SVT; while Yuri will monitor the SVT, increase the beam current to 5-10 nA: to be able to do that, FSD thresholds that were set for 1.5 nA will have to be scaled up according to the current (the new thresholds have to be communicated to MCC that will set them in the system).
  • once all detectors are on, contact C. Smith (ECAL expert) to start the DAQ and online monitoring (CED and CLAS12MON): purpose of tonight running is to take data with empty target and different trigger configurations; the beam current, compatibly with SVT operation, can be adjusted to have a reasonable trigger rate;
  • whenever beam is off but Hall A or C have beam, checks rates and beam current monitor readings looking for possible bleedthrough.



General Instructions:

  1. During beam tune and harp scans Hall-B halo FSD must be masked.
  2. 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."
  3. 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.
  4. If DAQ crashed/broken: Follow instruction on Documentation tab. If cannot resolved in 20-30 min call DAQ on-call cell phone.
  5. With any issue contact On-Call Experts or RC - do not spend more than 15-20 min trying to fix the problem.



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