Difference between revisions of "Template:ShortTermSchedule-RGK"

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=== Nominal Beam Positions ===
 
=== Nominal Beam Positions ===
  
−
{| class="wikitable"
+
'''2C24A''' 
−
|-
+
* x = -1.7 mm
−
! BPM !! !! mm
+
* y = +0.5 mm
−
|-
+
 
−
| 2C24A || x || -1.7
+
'''2H01''' 
−
|-
+
* x = -0.7 mm
−
|  || y || +0.5
+
* y = +0.6 mm
−
|-
+
 
−
| 2H01 || x || -0.7
+
'''2C21A''' (not important for production)
−
|-
+
* x = -0.4 mm
−
| || y || +0.6
+
* y = +0.7 mm
−
|-
 
−
| 2C21A || x || -0.4
 
−
|-
 
−
|  || y || +0.7
 
−
|}
 
  
 
=== Harp Scan References ===
 
=== Harp Scan References ===

Revision as of 13:53, 18 January 2024

Experiment Coordinator: Annalisa D'Angelo

Run Coordinator: Susan Schadmand (757) 575-7540

PDL: Daniel Carman (757) 876-1789; Office: x5586

Daily RC/OA Meetings at 13:00 in CH Room 200C, and on ZOOM: URL Link

Important Notes

Do NOT change FSD settings without approval from RC or beamline expert!

In case of medical or fire emergency, call 9-911 from a LANDLINE phone in the Counting House and inform the Crew Chief and RC.

In case of evacuation of the Counting Room (e.g., due to a fire alarm), grab the shift expert phone and leave the room through the "EXIT" door leading to the parking lot. Do not leave through the hallway! Call the RC once outside so the latter will call MCC to turn the beam OFF to Hall B and inform other Hall B staff members.

If you have symptoms or a positive COVID test, do NOT come to your shift - instead, inform the PDL and the RC and JLab medical services immediately to arrange replacements.

Remote shift: If needed, worker shifts can be taken from off-site. Inform the PDL and RC. Also, make sure that you follow the instructions under the "Shift Worker" tab, as you need some lead time to set up!

Note to Shift Takers:

  • Read the ESAD, COO, RSAD, and ERG documents found on the "Current RG-K Run Info" as well as the yellow folder in the counting room. Before you start your first shift on the current experiment, you must sign on the list in the yellow folder. Thereby, you confirm that you have read and understand their content.
  • Read at least the previous 24 hours logbook entries to be aware of recent run details and changes
  • Arrive at least 10 minutes early for shift change
    • If it is your first shift or a shift after a long pause, do shadow an earlier shift for at least 4 hours to familiarize yourself with all shift duties and technicalities of the ongoing experiment.
  • Refresh the runwiki page/tabs; look over it/them every shift:
    • Follow the Shift Expert/Worker tab's instructions
  • Do not spend more than 15-20 min trying to fix a problem. In case of any issue, contact the On-call Experts or the RC.
  • Important links


Run Plan Wednesday, Jan. 18, 2024

HWP OUT

  • done: Beam tune on Faraday Cup (without 2H00), going up in steps from 5nA to 65nA

Trigger Validation

  • DAQ configuration: PROD67_PIN
  • For each trigger run, log the usual screenshots with trigger file name (in the title)
    • Trigger rgk_noDC_v1.2_300MeV.trg - 10 minute run
    • Trigger rgk_out_v1.1_300MeV.trg - 200M events
    • Trigger rgk_noDC_v1.1_300MeV.trg - 200M events (test for DAQ stability; if issues, call Sergey, possibly back out and continue production with rgk_noDC_v1.0_300MeV.trg)

Production

DAQ configuration: PROD67
Trigger: rgk_noDC_v1.1_300MeV.trg
Beam current: 65 nA
Run duration: 200M events
  • DAQ livetime ~90%
  • R1 DC occupancies <5% (log DC trips, see 'Recent Changes and Current Issues')

General Information

The main lights in the Hall (dome lights) and the Forward Carriage lights must be OFF because of light leaks. If these lights are switched on during an access, they should be switched off when leaving the Hall.

  • Refer to these photos: ON: [1], OFF: [2]
  • We have a new dome light switch outside of the hall in the labyrinth. See logbook entry: https://logbooks.jlab.org/entry/4204460
  • When the dome lights are switched off, they cannot be turned back on immediately, they require 10-15 min to cool down.

Beamline:

  • Orbit locks should generally be on.
  • If HWP is changed, start a new run
    • The absolute values of the SLM and FCUP charge asymmetry (Q-Asym (%)) should be less than 0.1%.

Detector HV OFF for beam tuning and Møller runs

  • SVT: LV ON; HV OFF, and MVT: LV ON; HV ON - Safe Voltage
  • Turn DC HV off only for beam tuning

Access to the Hall:

  • If you need to enter Hall B, alert Denny Insley (757-897-9060, cell/text: 757-810-9576) and the Run Coordinator (757-575-7540).
  • Check in with the shift personnel before entering the hall.

DAQ Operation & Related General Information

NEW STANDARD end and start of the run:

- "End run"
- "Cancel"
- "Reset"
- "Download"
- "Prestart"
- "Go"

This will ensure proper compression of the FADCs and therefore a smaller data rate.

Restart DAQ when changing configuration or trigger files, when the run did not end correctly, when ROCs are rebooted, or after RICH recovery:

- "Cancel"
- "Reset"
- "Configure"
- "Download"
- "Prestart"
- "Go"
  • Restart DAQ: ensure that each step is completed in the Run Control message window. During "Configure", look for error messages in the ROC terminals.
  • Some ROCs keep printing error messages while functioning properly, see logbook entry # 4215299 .
  • If a ROC is disconnected, the message will appear in the run control message window.
  • If a ROC has crashed.
    • Find out which one (look for busy ROCs)
    • End the current run
    • Issue a roc_reboot command ON JUST THAT ROC
    • PING the ROC to check that it is back up (some take longer than others)
    • Restart DAQ
  • Pop-up window: Enter the beam current and the type of run in the "Comment" field.
  • At the start and end of a run, check that the data in the Run Condition Data Base (RCDB) is correct, especially the manually filled fields.
  • Check and reset monitoring histograms every hour. Sometimes, it is the only way to know that a specific ROC needs to be rebooted.
  • In case of DAQ Disk space alarm, call the DAQ expert.
  • Contact the DAQ expert if you have any questions or doubts about how to proceed.

Triggers files

rgk_noDC_v1.0_300MeV.trg DC roads are not in the trigger. Hold off time is 3 us.
rgk_noDC_v1.1_300MeV.trg DC roads are not in the trigger. Hold off time is 2 us.
rgk_noDC_v1.2_300MeV.trg DC roads are not in the trigger. Hold off time is 1 us.
rgk_out_v1.1_300MeV.trg Outbending DC roads, Hold off time is 2 us.

Reference Values

FSD Thresholds

  • Upstream: 2 kHz
  • Midstream: 2 kHz
  • Downstream: 100 kHz
  • BOM: 50 kHz
  • 5 ms dwell time

Nominal Beam Positions

2C24A

  • x = -1.7 mm
  • y = +0.5 mm

2H01

  • x = -0.7 mm
  • y = +0.6 mm

2C21A (not important for production)

  • x = -0.4 mm
  • y = +0.7 mm

Harp Scan References

To Do Items

  • Faraday Cup Calibration
    • Rafo can use beam current scan taken from Sat. Jan. 13, during 13:50 - 14:20
  • Empty target running (with full field)
    • Goal is to take > 5% integrated charge, but not until about 2 weeks in
  • Prescale on FC cup trigger
    • Discuss when to study after we have a plan for Tuesday Jan. 16 down time
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