PRad Experiment Shift Information

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Shift Documentation

Experiment Safety Documentation (Required reading for all shift takers!)

Shift Schedule

Checklist

Hot Checkout

Beam Time Accounting

Run Spreadsheet 2016

Procedures

Manuals

JLab Logbooks

{{#switchtablink:Short Term Schedule}}

Short Term Schedule

PRad installation starts April 25, 2016

Installation Schedule

PRad 2016 run, May 13th to June 21st.
to be added.
Beam energy ? to be added.
Important: Document all your work in the logbook!

RC: Ashot (Bluejeans info for Run Meetings on TBD )

  • (999) 123-4567
  • 9 123 4567 from Counting Room

PDL: Eugene Pasyuk

Run Plan for May 12 - June 20, 2016:

PRad Run Plan (May 13 to June 21, 2016)


1) Photon Beam Tuning (~1 day):

• HyCal with GEM on Transporter and off the beam line; • Target cell off the beam line; • Tagger radiator off, collimator off; • Tagger magnet on (for Ee = 2.2 GeV).

a) establish a good electron beam (Ee = 2.2 GeV, Ie = 5 nA) on the tagger dump; b) take electron harp scans 2C21A and 2C24A, 

  check the position, widths and peak to tails ratio;

c) study beam halo by setting the harp wire in the tail region and ramping beam current up to 100 nA; d) lower beam current to 0.1 nA e) insert radiator 10-5 r. l.; f) check tagger counter scalars; g) setup MOR logic for calibration (gain equalizing) trigger T5 only;


2) HyCal Gain Equalizing, GEM efficiency measurements (~2.5 days):

a) establish HyCal temperature to T=16o and keep it stable; b) collimator in, 6.4 mm; c) target cell off the beam; d) HyCal is in “Bottom Right” position; e) 1”x1“l scintillator counters are installed in the beam line just after the Vacuum box and surveyed; f) establish good timing for the beam scintillator counters (record TDCs and ADCs for them) g) establish good timing for the HyCal readout; h) establish good timing for the GEM readout; i) adjust trigger delays, if necessary; j) set the gain value: E=2 GeV to ADC=4000 channel; k) start the gain equalizing process: scan to each module’s center, show the anode and dynode ADC distributions 

  on the computer screen, by changing the HV set anode ADC=4000 channel (with ~ 5% precision),  
  record the dynode signal value, save the HV, ADC and anode/dynode ratio, store the data from GEM, HyCal and 
  trigger scintillator detectors;

l) repeat part (k) for all HyCal modules (~15 hours).


3) HyCal Gain Calibration, GEM efficiency measurements 

                                                                                                                                           (~3.0 days):

a) run HyCal with HV unchanged for ~ 3 hours after the “Gain Equalizing” in the part #2; b) the beam and the beam line are the same as in the part #2 “Gain Equalizing”; c) tagger trigger: all T1-T19 tagger counters and several T-counters from the middle part, DAQ readout w 

  ithout the “sparsification” option;

d) start from the “Top Left” position and with a continuous motion (~0.3 min/module) “illuminate” all modules, 

  store the data (HyCal + GEM) with the HyCal’s X,Y positions from EPICS;

e) stop the HyCal motion by the end of each row, make new DAQ run with pedestals and LMS, store the files; f) repeat item (e) for all rows of HyCal, and store the data; g) run on-line calibration programs for the gain constants, store the data.


4) Setup configuration, change from calibration to run: 

 > HyCal is off from the Transporter to the run cart, assembling the beam line, check the vacuum levels in 
   the beam line, engineering survey                                                                                                             (~4 days).
 > Request for the Beam Energy Change to Ee = 1.1 GeV  (0.5 day, during the same time).


5) Electron Beam Tuning and Target Commissioning (~4 days)

a) target cell off the beam line, no gas flow in the cell and chamber; b) collimator off; c) set threshold energy for the HyCal trigger E ~ 0.5xEe ; d) request electron beam (E = 1.1 GeV, I = 1 nA); e) take harp scans 2C21A, 2C24A and 2H01, check position and widths, establish a good electron beam and fix 

  the beam line parameters;

f) record HyCal trigger rate with no cell and no gas flow, take one short DAQ run (GEM+HyCal); g) electron beam off; insert the target cell in the beam line, still empty, ask for the beam back; h) target cell is empty (no gas flow into the cell and chamber); i) record HyCal trigger rate, take one short DAQ run; j) gas flow in the cell (Pcell = 6 torr, Pcham = 5 mtorr); k) record HyCal trigger rate, take one short DAQ run; l) move the cell on X-axis by +/- 3 mm with 0.2 mm steps and record the HyCal rate; m) move the cell on Y-axis by +/-3 mm with 0.2 mm steps and record the HyCal rate; n) change the cell angles and record the HyCal rate, get optimal cell direction; o) center the cell in the beam line based on those measurements; p) no gas flow into the cell and chamber, record the HyCal rate; q) gas flow into the cell (Pcell = 6 torr, Pcham = 5 mtorr); r) record HyCal trigger rate, take one short DAQ run; s) gas flow into the chamber only (Pcell = Pcham = 5 mtorr); t) record HyCal trigger rate, take one short file with ADCs (in-beam residual gas effect); u) If there is no sizable effect between cell in/out, skip following steps. v) beam off, 12.7 mm collimator in, target cell in, ask for beam; w) no gas flow in cell, record HyCal rate; x) gas flow in the cell (Pcell = 6 torr, Pcham = 5 mtorr), record HyCal rate; y) beam off, insert 6.4 (?) mm collimator in, take beam and repeat items (w) and (x); z) make a decision about the size of the collimator.


6) Data taking with Ee = 1.1 GeV (5 days)

a) beam intensity: Ie = 10 nA; b) collimator in (with the diameter defined in 5 (z); c) HyCal trigger is set, DAQ is ready, all slow control readout is ready; d) target cell in with maximum density (2.x1017 H/cm3); e) take data for 2 days, record all information on disk and on tape; f) no gas in the cell, take data for 0.5 day (empty target run); g) gas in the cell, run for 2 days (same as in (e)); h) no gas in the cell, take data for 0.5 day (empty target run);


7) REQUEST FOR Beam Energy CHANGE to Ee = 2.2 GeV (0.5 day)

8) Data taking with Ee = 2.2 GeV (6 days) a) intensity: : Ie = 10 nA; b) collimator in (with the diameter defined in 5 (z); c) HyCal trigger is set, DAQ is ready, all slow control readout is ready; d) target cell in with maximum density (2.x1017 H/cm3); e) take data for 2 days, record all information on disk and on tape; f) no gas in the cell, take data for 0.5 day (empty target run); g) gas in the cell, run for 2.0 day (same as in (e); h) no gas in the cell, take data for 0.5 day (empty target run).

Start close-up of the Hall at ?? on ?? , May 1 (see "General instruction" on the right)

After hall is in "Beam Permit" turn on the chicane (see "Setting up Chicane for E=2.3 GeV" under "General instructions" on the right)

Establish beam to the tagger dump (see "General instruction" on the right)

Bring beam to FC:

  1. Note: in order to have reliable readings on two important for PRad, beam current should be > ?? nA. Before moving forward with 2H02A harp scans and beam profile tune, make sure orbit lock is engaged. For orbit lock positions on 2H00(X=~0.,Y=~0.). on 2H02(X=0.4,Y=-0.7). The new positions for collimator at this beam position are: 3.94 mm at 6.198, 2.82 mm at 5.03. (?? number for PRad). Due to higher rates on halo counters we will run with 3.94 mm collimator. . All studies should be done with beam currents between 25 nA and 30 nA.
  2. The required beam profile at 2H02A harp is: X-width <~0.25 mm, Y-width <~ 0.05 mm, and the tilt angle <15 degrees. Do not west too much time on beam tune, as long as rates on the halo counters are low - Downstream L/R/T/B and HPS-L/R <~few Hz/nA, and HP-SC < few x 10 Hz, the following program still can be done:
    • Check rates on ECal - Turn ON Ecal and observe rates in modules close to the beam in Top and Bottom. If rates are too asymmetric (difference is larger than 30%) try to equalize or bring them close by moving the beam vertically from high rate module towards the low rate. Note, movement must be done according to 2H02 Y-position readings. SVT collimator must be positoned accordingly - remember BPM readings are in mm, collimator steps are in inches.
  3. Study rates on HyCal channels for (make a log entry of PRad GUI ? for each condition):
    • as a function of beam current without and with production target (4 um W).
    • for different collimators (3.94 mm, 2.82 mm, and 2.25 mm) without and with target
  4. Start trigger rates studies, establish running conditions (see instructions under "Procedures" on the documentation tab for "Trigger").
    • Take parasitic data on fast beam motion using struck scaler system. Call ? Ashot ? if it is between 8am and 10pm.
  5. If beam stability and profile are acceptable:
    • ??
    • ??


Miscellaneous 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:

Locking up the hall on Fridays

  • At 2pm check the status of the activities in the hall and notify RC if there are potential delays for the lockup at 3pm.
  • Work with the hall work coordinator (Doug Tilles or his designee) to make sure hall is ready for sweep at around 3pm: vacuum is good, magnet power supplies are turned ON and on remote, LCW is on.
  • Make sure experts, beamline, ECal, SVT, and slow controls, checked their systems befor the lockup.
  • When ready notify MCC to start seep and lockup of the hall.
  • Make sure all necessary monitoring GUIs are up and running.
  • Make sure beam viewer screens are up.

Acceptable Beam Conditions:

  1. To establish good beam conditions:
    • Make sure SVT is retracted and completely OFF
    • First send beam to the tagger dump (ask MCC to turn ON the tagger magnet).
    • Check that beam type is "Photon" on the BTA GUI (can be opened from "Beam" GUI).
    • Check the beam position on the tagger viewer, it should be approximately in the centre of the screen
    • Follow instructions under "Procedures" on the documentation tab for "Beamline"[1]. 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 ([2],[3]). Positions on both harps should be with +/- 1mm, widths on 2C21 should be <~0.1+/-0.05 mm, and on the tagger harp (2C24) <~0.35 +/- 0.1mm.
    • Halo counters UPS-L/R and TAG-L/T/T2 should be ~few Hz/nA [4]
  2. Before sending beam to the Faraday cup
    • Check that SVT protection collimator is on beam
    • HPS target is OUT
    • SVT is OUT (position 0 mm) and voltages are OFF
    • ECal HV is OFF
  3. Send beam to the Faraday cup
  4. Follow the instructions under "Procedures" on the documentation tab for "Beamline"[5] 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 >25 nA. All studies should be done with beam currents between 25 nA and 30 nA.
    • Ask MCC to establish 25 nA beam with HPS orbit locks on (We need HallBHPSOrb not HallBOrb configuration). For orbit lock positions on 2H00(X=~0.,Y=~0.). on 2H02(X=0.4,Y=-0.7). The new positions for collimator at this beam position are: 3.94 mm at 6.198, 2.82 mm at 5.03. Due to higher rates on halo counters we will run with 3.94 mm 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 <~ 0.05 mm, and the tilt angle <15 degrees.
    • Check 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 [6]
    • Positions on BPMs must be close to what they were before [7]
    • Insert the 4um W target without turning off the beam.
  5. 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.

Recovering from beam trips when running SVT at 0.5 mm:

  1. SVT HV will trip off automatically
  2. Check the FSD GUI to see if high rates in the HPS halo counters generated the trip
    • If it was not an HPS halo counter trip, MCC will restore the beam as usual (following their own instructions). As soon beam is back and stable, restore SVT HV.
    • If it was an HPS halo counter trip, MCC will not restore the beam. Inform MCC that we will get back to them when we are ready for beam.
      1. Retract the SVT to its 1.5 mm stations, both top and bottom.
      2. Tell MCC we are ready for beam.
      3. Once beam is restored, confirm that both 2H02 beam positions x and y are as desired and halo counter rates are as expected.
      4. Once beam is stable for ~1 minute, restore SVT HV and the SVT to its nominal position.
      5. Resume data taking.

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 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)
  5. With any issue contact On-Call Experts or RC

Every Run:

  1. After "Prestart" but before "Go", Check ECal Latency
  2. After "Go": Check SVT Occupancy
  3. Update the run spreadsheet on Google Docs.
  4. See the whiteboard for everything else that should be done on a per-run basis.


CODA Instructions:

  1. First open a terminal type : ssh pradrun@prad use the username:pradrun , password: pradtocome
  2. then at home directory ,do: ~/source SourThisForCoda.csh [Enter]
  3. open a new terminal to start the msqld, do: ~/ msqld [Enter]
  4. open a new terminal to start the rcplatform, do: ~/rcplatform [Enter]
  5. open a new terminal to start the fastbus roc1 ,do: coda_roc_rc3 -i -name pradroc1 -t ROC
  6. open a new terminal to start the fastbus roc2 ,do: coda_roc_rc3 -i -name pradroc2 -t ROC
  7. open a new terminal to start the fastbus roc3 ,do: coda_roc_rc3 -i -name pradroc3 -t ROC
  1. open a new terminal to start the coda, do:
    • ~/codamaster [Enetr] choose "pradrun" configuration,then enable botton for et,eb,and er,then hit runcontrol.
    • in CODA Gui, hit connect button then hit configure button, then hit download,then hit prestart, then hit go button, now it should start taking data.
  2. if you re-start et , please do: ~/ rm /tmp/et_sys_PRad01 before you start the CODA.

HyCal Instructions:

  • HV must be OFF during FIRST delivery of beam to the Faraday Cup after tuning to the Tagger Dump.
    • Only after stable beam established to Faraday Cup can HV can be turned ON.
  • HV should be OFF when running beam studies with Struck scalers with 1 mm wire or tuning collimator position.
  • HyCal HV control
    • go to the DAQ computer home directory, type: primexHV , password is PUs&r.


Online monitoring Instructions:

  • go to the DAQ computer home directory, type: source SourceThisForCoda.csh [Enter]
  • then : cd Hycalview [Enter] , then type: ./hycalview [Enter].
  • now you should see the GUI of online monitor, at menu choose online mode -> start online mode



{{#switchtablink:Long Term Schedule|Click here to go to the next tab...}}


Long Term Schedule

Run Coordinator
May 01 - May 07 Ashot
May 07 - May 13 Ashot
May 13 - May 19 Ashot
May 19 - May 25 Ashot
May 25 - Jun 01 Ashot
Jun 01 - Jun 07 Ashot
Physics Division Liaison
May 1 - Jun 1 Ashot
Beamline
May 01 - May 07 Ashot
May 07 - May 13 Ashot
May 13 - May 19 Ashot
May 19 - May 25 Ashot
May 25 - Jun 01 Ashot
Jun 01 - Jun 07 Ashot
SlowControls
May 01 - May 07 Ashot
May 07 - May 13 Ashot
May 13 - May 19 Ashot
May 19 - May 25 Ashot
May 25 - Jun 01 Ashot
Jun 01 - Jun 07 Ashot
HyCal
May 01 - May 07 Ashot
May 07 - May 13 Ashot
May 13 - May 19 Ashot
May 19 - May 25 Ashot
May 25 - Jun 01 Ashot
Jun 01 - Jun 07 Ashot
GEM
May 01 - May 07 Ashot
May 07 - May 13 Ashot
May 13 - May 19 Ashot
May 19 - May 25 Ashot
May 25 - Jun 01 Ashot
Jun 01 - Jun 07 Ashot
DAQ
May 1 - Jun 1 Ashot


Spring 2015 Final @ 1 GeV:

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{{#switchtablink:Monitoring |Click here to go to the next tab...}}


Monitoring

Webcams:


Accelerator:

Slow Controls:


Online & Offline:


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Phone Numbers

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) 541-7539 (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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