Difference between revisions of "The HPS Run Wiki"
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− | == Run Plan August | + | == Run Plan August 23-24, 2019 == |
* <b>Schedule and plans:</b> | * <b>Schedule and plans:</b> | ||
+ | # Establish beam for HPS (see instructions on the right column) | ||
# <b> Take production data with PROD66 (PROD67) / hps_v11_5.trg 20um target at 120 nA, HPS collimator 2.82 mm. Length of the run will be defined by the SVT bias currents, but no longer than 4 hours. | # <b> Take production data with PROD66 (PROD67) / hps_v11_5.trg 20um target at 120 nA, HPS collimator 2.82 mm. Length of the run will be defined by the SVT bias currents, but no longer than 4 hours. | ||
+ | # After one produciton run, let SVT expert to do studies at different bias voltages and at low luminosity (50 nA on 8 um target) | ||
+ | # Then continue production data taking | ||
<!--# Take random trigger data, 1 run for 300M events: PROD66 (PROD67) / hps_v6_random_30khz.trg 20um target at 120 nA, HPS collimator 2.82 mm | <!--# Take random trigger data, 1 run for 300M events: PROD66 (PROD67) / hps_v6_random_30khz.trg 20um target at 120 nA, HPS collimator 2.82 mm | ||
# Take No-target data (~1 hour): PROD66 (PROD67) / hps_v11_5.trg at 120 nA, HPS collimator 2.82 mm --> | # Take No-target data (~1 hour): PROD66 (PROD67) / hps_v11_5.trg at 120 nA, HPS collimator 2.82 mm --> | ||
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</b> | </b> | ||
− | * Beam will be down on Thursday, August 22, ~ 8am for Hall-A wWein angle change: | + | <!-- * Beam will be down on Thursday, August 22, ~ 8am for Hall-A wWein angle change: |
− | + | # At 6:45 am turn off the chicane and call beamline expert to setup for straight track run | |
− | # After beam is off, SVT expert will cool down SVT to -20 C and perform a basline run | + | # After beam is off, SVT expert will cool down SVT to -20 C and perform a basline run --> |
− | + | ||
* Do beam profile check ones a day, at 9 am, using 2H02 and SVT wire harps | * Do beam profile check ones a day, at 9 am, using 2H02 and SVT wire harps | ||
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#* Check the beam position on the tagger viewer, it should be approximately in the center of the screen | #* 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"[https://wiki.jlab.org/hps-run/images/e/e6/HPS_beamline_comm.pdf]. To tune the beam on tagger dump and perform harp scans beam current should be <10 nA. | #* Follow instructions under "Procedures" on the documentation tab for "Beamline"[https://wiki.jlab.org/hps-run/images/e/e6/HPS_beamline_comm.pdf]. To tune the beam on tagger dump and perform harp scans beam current should be <10 nA. | ||
− | #* Check profile using 2C21 and tagger (2C24) harp scans and compare the positions and widths with previous scans ([https://logbooks.jlab.org/entry/ | + | #* Check profile using 2C21 and tagger (2C24) harp scans and compare the positions and widths with previous scans ([https://logbooks.jlab.org/entry/3720088],[https://logbooks.jlab.org/entry/3720089]) |
#** Positions on both harps should be within 1mm | #** Positions on both harps should be within 1mm | ||
#** Width on 2C21 should be <~0.2+/-0.05 mm | #** Width on 2C21 should be <~0.2+/-0.05 mm | ||
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<b> Note: in order to have reliable readings on two important for HPS BPMs, 2H00 and 2H02, beam current should be >30 nA.</b> | <b> Note: in order to have reliable readings on two important for HPS BPMs, 2H00 and 2H02, beam current should be >30 nA.</b> | ||
#* Ask MCC to establish 30 nA beam with <font color=red>HPS</font> orbit locks on (We need '''HallBHPSOrb''' not '''HallBOrb''' configuration). <b>For orbit lock positions on <font color=red>2H00(X=1.0,Y=1.5) and on 2H02(X=-1.7,Y=0.3). Use the 2.82 mm SVT collimator. (positions changed 6/25/19 by mg)</font></b>. | #* Ask MCC to establish 30 nA beam with <font color=red>HPS</font> orbit locks on (We need '''HallBHPSOrb''' not '''HallBOrb''' configuration). <b>For orbit lock positions on <font color=red>2H00(X=1.0,Y=1.5) and on 2H02(X=-1.7,Y=0.3). Use the 2.82 mm SVT collimator. (positions changed 6/25/19 by mg)</font></b>. | ||
− | #* Tune beam profile at HPS using measured widths on 2H01A and 2H02A harps. The required beam profile at 2H02A harp is: X-width <~0.1 mm, Y-width <~ 0.05 mm. Beam profile using 2H01A and 2H02A harps with previous scans ([https://logbooks.jlab.org/entry/3696650],[https://logbooks.jlab.org/entry/ | + | #* Tune beam profile at HPS using measured widths on 2H01A and 2H02A harps. The required beam profile at 2H02A harp is: X-width <~0.1 mm, Y-width <~ 0.05 mm. Beam profile using 2H01A and 2H02A harps with previous scans ([https://logbooks.jlab.org/entry/3696650],[https://logbooks.jlab.org/entry/3720218]) to compare. |
#* Check and log the beam spot on chromax viewer | #* Check and log the beam spot on chromax viewer | ||
#* The halo counter rates before HPS must be very low: | #* The halo counter rates before HPS must be very low: | ||
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#*# 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 50 Hz/nA [https://logbooks.jlab.org/entry/3696813] | #*# 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 50 Hz/nA [https://logbooks.jlab.org/entry/3696813] | ||
#* Positions on BPMs must be close to what they were before [https://logbooks.jlab.org/entry/3696813] | #* Positions on BPMs must be close to what they were before [https://logbooks.jlab.org/entry/3696813] | ||
− | #* When everything is stable, perform SVT wire scan and compare with the nominal [https://logbooks.jlab.org/entry/ | + | #* When everything is stable, perform SVT wire scan and compare with the nominal [https://logbooks.jlab.org/entry/3720219] |
#* Once all the above is achieved, turn ECAL and Hodoscope HV '''ON''' to monitor and log ECal rates | #* Once all the above is achieved, turn ECAL and Hodoscope HV '''ON''' to monitor and log ECal rates | ||
− | #* Insert the | + | #* Insert the 20 um W target (turn beam off first). |
# '''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.''' | # '''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.''' | ||
Revision as of 01:37, 23 August 2019
Phone NumbersShift ScheduleShift-Taker's ChecklistHot CheckoutBeam Time AccountingRun Spreadsheet 2019,2016, 2015HPS Upgrade ERRCOO, ESAD, RSAD Adendum to RSAD Things to read before shift. |
Procedures
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Manuals |
JLab Logbooks
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HPS (E12-11-006) 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
Important instructions
* Turn OFF beam before target move!
* No access to the alcove if the chicane magnet beacon is ON.
Chicane magnets must be OFF if the hall is in Controlled access and access to the alcove is needed or when the hall is in Restricted access. If Chicane magnets are OFF, they can be energized only when the hall is in Power or Beam Permit, [1].
* TURN OFF the chicane magnet if beam is not available due to a thunderstorm. Loss off power would seriously damage detectors.
* Fill out BTA hourly. Click "Load from EPICS" to fill the left side, then make sure numbers are correct. If needed edit the entry.
NO ABUs or BANU if beam tune is in progress, make it all BNA with ER 100%. At the end of the shift save BTA to the logbook!
* Please close any GUI that is not being used, e.g. close harp scanner after harp scan is done, close chicane, after chicane is ON, etc.
* For orbit lock positions on 2H00(X=1.0,Y=1.5) and on 2H02(X=-1.7,Y=0.3). Use the 2.82 mm SVT collimator
Run Plan August 23-24, 2019
Every Shift:
Every Run:
SVT Bias Currents:Shifters must pay attention to the L0 bias currents. This is on both the SVT motor GUI and the main bias GUI. The bias currents will slowly creep up over the course of a run. When the bias current is between 15-20 uA for either L0 sensor, do the following:
Do not let the bias current exceed 20 uA. It takes about 4-5 hours for the bias currents to creep up to those values. Call SVT expert if unsure. Harp Scan Procedure:
Important Notes:
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General InstructionsEstablishing Physics Quality Beam for HPS:
Note: in order to have reliable readings on two important for HPS BPMs, 2H00 and 2H02, beam current should be >30 nA.
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RC daily meetings at 2 pm in the counting-house 2nd-floor conference room.
BlueJeans Info:
URL: https://bluejeans.com/794825703
Meeting ID: 794825703
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Webcams:
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Accelerator: |
Slow Controls:
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Online & Offline: |
System/Person | Pager/Phone Number |
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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 | 5244(Shift1), 5245(Shift2) |
Hall-B Counting Room | 5247(Expert), 5502(Target) |
Hall-B Counting Room | 5246(RC1), 5126(RC2) |
Hall-B Gas Shed | 7115 |