Difference between revisions of "Engineering Run"

Revision as of 10:00, 19 January 2018

Manuals

DC
FTOF
ECAL
LTCC
HTCC
RICH: expert novice
CTOF
CND
SVT
MVT
- MVT turn on procedure
FT
Beamline
Torus Power-Up and Power-Down Procedure
Solenoid Power-Up and Power-Down Procedure
Target
DAQ
Slow Controls

Procedures

JLab Logbooks

Role	Phone Number
Hall B Run Coordinator	(757) 575-7540 (cell)
Hall B Physics Division Liaison	(757) 876-1789 (cell)
MCC	7048
Crew Chief	7045
Crew Chief	(757) 876-3367 (cell)
Program Deputy	(757) 876-7997 (cell)
RadCon	(757) 876-1743 (cell)
Gate House Guard	5822

Location	Phone Number
Hall B Floor	5165
Hall B Space Frame	5170 and 5171
Hall B Forward Carriage	5371
Hall B Gas Shed	7115
Hall B Counting House	5244 (Shift Expert)
Hall B Counting House	(757) 329-4846 (Shift Expert cell)
Hall B Counting House	5245 or 5126 (Shift Worker)
Hall A Counting House	5501
Hall C Counting House	6000
Hall D Counting House	5504

Hall B System	Phone Number	On-Call Person
Engineering	(757) 748-5048 (757) 897-9060	Engineering On-Call (primary) Denny Insley (secondary)
Slow Controls	(757) 748-6922	Nathan Baltzell
Beamline	(757) 303-3996	Eugene Pasyuk
DC	(757) 218-4372 (757) 748-5048	Florian Hauenstein (primary) Engineering On-Call (secondary)
SVT/MVT/MM	(757) 541-7539 (757) 753-7769	Yuri Gotra (primary) Rafo Paremuzyan (secondary)
ECAL	(757) 810-1489	Cole Smith
FTOF/CTOF/CND	(757) 344-7204	Daniel Carman
ALERT	AHDC - (757) 329-4844 ATOF - (757) 991-2798	Raphael Dupré Whitney Armstrong
HTCC/LTCC	(757) 344-7174	Youri Sharabian
FT	(757) 344-1848	Raffaella De Vita
BAND	(757) 310-7198	Florian Hauenstein
RICH	(757) 344-3235 (757) 748-6922	Christopher Dilks (primary) Nathan Baltzell (secondary)
DAQ	(757) 232-6221	Sergey Boiarinov
HYDRA	(317) 550-9226	Torri Jeske

Authorized Hall B Solenoid/Torus Operators
Hall B	Denny Insley, Morgan Cook, Eugene Pasyuk
Magnet Group	Probir Ghosha, Renuka Rajput-Ghoshal
Detector Support Group	Brian Eng, Pablo Campero, Tyler Lemon
DC Power	Onish Kumar, Sarin Philip

Note, all non-JLab numbers must be dialed with an area code. When calling from a counting-house landline, dial "9" first.
To call JLab phones from outside the lab, all 4-digit numbers must be preceded by 757-269
Click Here to edit Phone Numbers. Note, you then also have to edit the current page to force a refresh.

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

CLAS12 Engineering Run, Winter 2018
Beam energy 2.1 GeV (1 pass)
Important: Document all your work in the logbook!
Remember to fill in the run list at the beginning and end of each run (clas12run@gmail.com can fill the run list)

RC: Raffaella De Vita

(757) 575-7540
9 575 7540 from Counting Room
carman@jlab.org

PDL: Eugene Pasyuk

(757) 876-1789
9 876-1789 from Counting Room
pasyuk@jlab.org

Note 1: Be very mindful of the background rates in the halo counters, rates in the detectors, and currents in the SVT for all settings to ensure that they are at safe levels.

Note 2: At the end of each run, follow the DAQ restart sequence "end run", "abort", "reset", "download", "prestart", "go". The DAQ rate should be 5 - 6 kHz (this includes a 1 kHz pulser). After DAQ prestart is complete reboot the scaler IOCs with the command: iocjscalerRestartAll.sh. Note: After each step, make sure it is complete in the Run Control message window. If a roc has crashed, find which one it is and issue a roc_reboot command and try again. Contact the DAQ expert if there are any questions.

Note 3: Nominal beam positions: 2C21 (X=0.0 mm, Y=0.0 mm), 2C24 (X=0.0 mm, Y=0.7 mm), 2H01 (X=1.0 mm, Y=-1.0 mm)

Run Plan:

(last update 1/19 - 8:30 pm)

Zero field alignment runs:
- Starting at 8:30 am, ramp the torus to 0 field (call E. Pasuyk and/or RC to do it)
- Take data with full target for 1h, electron trigger, 3 nA (DAQ live time should be about 85% or greater)
- Empty the target
- Take data with empty target for 1h, electron trigger, 3 nA (DAQ live time should be about 85% or greater)
- Establish a beam current of 0.1 nA and start the DAQ with electron trigger
- Start lowering the solenoid in steps of 10% while monitoring detectors rates (call detector experts and SVT and MVT in particular ahead of time to have them watching their system) and DC occupancies. At 40% solenoid, ask MCC to mask the solenoid relay from the FSD. Continue ramping down the solenoid until rates are sustainable.
- Take data at the lowest field sustainable by DC and CVT. If DC cannot sustain the rate, turn off DC HV. Run duration will depend on the number of reconstructed tracks and will be decided based on the results from cooking the first files.

Physics studies (3 settings) 1 shift per setting:
- 60% torus (pos. polarity), -60% solenoid (neg. polarity)
- 60% torus (pos. polarity), -100% solenoid (neg. polarity)
- 100% torus (pos. polarity), -100% solenoid (neg. polarity)

Beam Tuning:

Whenever preparing to receive beam, make sure the following conditions are established: all CLAS12 detectors are off and target is empty. Turn DC HV off, leaving LV on. For SVT, MVT, FTH and FTT, first turn 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/3507602 and https://logbooks.jlab.org/entry/3507605. 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:
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; while the magnet is being degaussed call the beamline expert (S. Stepanyan) to inform him, you are starting the procedure to send the beam to the Faraday Cup;
3. position 20 mm collimator on the beam and move "Chromax" 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: the profile for 2H01 should be as in https://logbooks.jlab.org/entry/3507626. Make sure you select the proper PMT for the analysis. The profile at 2C21 and 2C24 should be as in the scans performed with beam to the tagger magnet yoke dump. If necessary ask MCC to adjust the beam profile at 2H01 to match the previous scan.

When ready to get beam, turn all beamline devices ON, turn all CLAS12 detectors OFF

General Instructions:

During beam tuning and harp scans Hall-B halo FSD must be masked.
For a given beam current, compute the FSD thresholds according to the Establish Physics Quality Beam document. Call MCC to update the values. Contact the beamline expert if there are questions about setting the FSD thresholds.
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.
Do not run more than 60 minutes above 30 nA with 5-pass beam without the beam blocker in front of Faraday cup. Put beam blocker in for long running at high currents for 5 pass operations.
Turn DC HV off only for beam tuning; if no beam is available or when beam is stable, keep them on even if you are not taking data.
In case of loss of communication with IOCBTARG, follow instructions at https://logbooks.jlab.org/entry/3502218
With any issue contact On-Call Experts or RC - do not spend more than 15-20 min trying to fix the problem.
All jscaler iocs (iocjscalerX) on the health screen under DAQ tab) must be restarted after every DAQ prestart is completed.
Check that no unecessary beamline-related screens are open. This includes particularly the big beamline overview screen, but also and any motor/harp/collimator screens, and ioc health screens.

Every Shift:

Follow run plan as outlined by RC
If any concern about beam stability, ask MCC if orbit locks are on (they should be).
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
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:

Log screenshots of:
- main scaler GUI display
- Detector occupancy plots
- Trigger rate gui
- Beam strip charts

@@ Line 96: / Line 96: @@
 == <font color=blue>''' Run Plan:'''</font>==
-''(last update 1/18 - 2:30 pm)''
+''(last update 1/19 - 8:30 pm)''
-* Continue production running at -60% torus (neg. polarity), 100% solenoid (pos. polarity) with the electron trigger set with an energy threshold of 150 MeV and beam current of 3 nA. Check periodically the DAQ live time: this should be around 85%.
-* At 1:30 pm leave the DAQ to Ben Raydo and the FT expert to continue FT trigger studies.
-* After trigger studies are completed, restart production data taking in the previous conditions: electron trigger with an energy threshold of 150 MeV and beam current of 3 nA. Check periodically the DAQ live time: this should be around 85%.
-* At 9 pm, call the RC to have the solenoid field lowered at 60% and continue production data taking at this setting (-60% torus, 60% solenoid until the morning tomorrow.
 * Zero field alignment runs:
-** Ramp the torus to 0 field (call E. Pasuyk and/or RC to do it)
+** Starting at 8:30 am, ramp the torus to 0 field (call E. Pasuyk and/or RC to do it)
-** Take data with full target, electron trigger, 3 nA (DAQ live time should be about 85% or greater)
+** Take data with full target for 1h, electron trigger, 3 nA (DAQ live time should be about 85% or greater)
 ** Empty the target
-** Establish a beam current of 0.3-0.5 nA and start the DAQ with electron trigger
+** Take data with empty target for 1h, electron trigger, 3 nA (DAQ live time should be about 85% or greater)
+** Establish a beam current of 0.1 nA and start the DAQ with electron trigger
 ** Start lowering the solenoid in steps of 10% while monitoring detectors rates (call detector experts and SVT and MVT in particular ahead of time to have them watching their system) and DC occupancies. At 40% solenoid, ask MCC to mask the solenoid relay from the FSD. Continue ramping down the solenoid until rates are sustainable.
-** Take data at the lowest field sustainable by DC and CVT. Run duration will depend on the number of reconstructed tracks and will be decided based on the results from cooking the first files.
+** Take data at the lowest field sustainable by DC and CVT.  If DC cannot sustain the rate, turn off DC HV. Run duration will depend on the number of reconstructed tracks and will be decided based on the results from cooking the first files.
 * Physics studies (3 settings) 1 shift per setting:

Difference between revisions of "Engineering Run"

Revision as of 10:00, 19 January 2018

Shift Schedule

Shift Checklist

Hot Checkout

Beam Time Accounting

Manuals

Procedures

JLab Logbooks

RC: Raffaella De Vita

PDL: Eugene Pasyuk

Run Plan:

Beam Tuning:

General Instructions:

Every Shift:

Every Run:

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Manuals

Epics on the web

Hall-B

Accelerator

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