Difference between revisions of "Fall 2015 Commissioning Plan"

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(General Information)
(General Information)
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This document describes the run plan and procedures for the Hall D Fall 2015 commissioning.  
 
This document describes the run plan and procedures for the Hall D Fall 2015 commissioning.  
  
* Schedule for the Fall 2015 run. (Dates are according to the [Media:memo_and_schedule_20151113_public.pdf]. They will be updated if necessary in the [https://halldweb.jlab.org/wiki/index.php/Run_Coordination_Meetings:_Fall_2015_Run run coordination meeting pages])
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* Schedule for the Fall 2015 run. (Dates are according to the [https://halldweb.jlab.org/wiki/images/3/33/Memo_and_schedule_20151113_public.pdf long term calendar]. They will be updated if necessary in the [https://halldweb.jlab.org/wiki/index.php/Run_Coordination_Meetings:_Fall_2015_Run run coordination meeting pages])
 
*# Dec. 7th-8th Electron/Photon beam restoration (1 days)
 
*# Dec. 7th-8th Electron/Photon beam restoration (1 days)
*# Dec. 8th-16th: Accelerator Fast Feedback commissioning, nA BPM commissioning. Meanwhile, we may parasitically conduct some tagger detector tests. We may also have the beam available, typically during the night, to conduct our own commissioning.   
+
*# Dec. 8th-16th: Accelerator Fast Feedback commissioning and nA BPM commissioning. Meanwhile, we may parasitically conduct tagger detector tests. We may also have the beam available, typically during the night, to conduct our own commissioning.   
 
* Goals for the Spring 2015 run.
 
* Goals for the Spring 2015 run.
 
# Beam transport and control commissioning (accelerator responsibility):
 
# Beam transport and control commissioning (accelerator responsibility):
#* Position Fast Feedback: Trent Allison, Brian Bevins. Expected time: 40h.  
+
## Position Fast Feedback: Trent Allison, Brian Bevins. Expected time: 40h.  
#* nA BPM: Trent Allison, Brian Bevins. <span style="color:red">Expected time: ?? h. </span>
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## nA BPM: Trent Allison, Brian Bevins. <span style="color:red">Expected time: ?? h. </span>
#* Beam line model test: Todd Satogata). Expected time: 2 h.
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## Beam line model test: Todd Satogata). Expected time: 2 h.
 
# Continue commissioning of the Hall D equipment (Hall D responsibility):
 
# Continue commissioning of the Hall D equipment (Hall D responsibility):
#* [http://argus.phys.uregina.ca/gluex/DocDB/0028/002819/001/TAGMFall2015RunPlan.pdf Tagger detectors commissioning] (Richard J. and Alex B.).  
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## [http://argus.phys.uregina.ca/gluex/DocDB/0028/002819/001/TAGMFall2015RunPlan.pdf Tagger detectors commissioning] (Richard J. and Alex B.). Expected time: 7h.
#* PS, tagger detectors and trigger studies (Alex S.): Expected time: needs as much data as possible on the . This is basic investigations, Main magnetic field is not necessary. We will need to have the calorimeters, SC and TOF on during theses studies.  <span style="color:red">Detailed plan needed from Alex S. </span>  
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##* Bias voltage study can be done parasitically to the FFB work.
#* Trigger tests at high current (μA): Alex S.
+
## PS, tagger detectors and trigger studies (Alex S.): Expected time: needs as much data as possible. Main magnetic field is not necessary. Calorimeters, SC and TOF need to be on during theses studies.  <span style="color:red">Detailed plan needed from Alex S. </span>  
#* DAQ (Sergey F). Expected time: about 1h of dedicated DAQ time each day. The goal is to optimize DAQ performance : data rate, trigger rate, live time.  Several parameters have to be defined for every DAQ components independently: detectors readout (for FDC,CDC,FCAL,BCAL,...) , event builder, data concentrators, event recorder, to find the slowest. Optimization includes different triggers and beam currents.
+
## Trigger tests at high current (μA): Alex S.
DAQ work. The goal is to optimize DAQ performance and find DAQ rate bottlenecks: data rate, trigger rate, live time. Several parameters have to be defined for every DAQ components independently: detectors readout (for FDC,CDC,FCAL,BCAL,...), event builder, data concentrators, event recorder, to find the slowest. Optimization includes different triggers and beam current. FDC/CDC will be needed for about 30min with a 50-100nA current. In a nutshell:
+
## DAQ (Sergey F). Expected time: about 1h of dedicated DAQ time each day.  
The detectors will be running the same hardware (no new fiber bundles for Fall15) and software as the previous run.
+
##*The goal is to optimize DAQ performance : data rate, trigger rate, live time.  Several parameters have to be defined for every DAQ components independently: detectors readout (for FDC,CDC,FCAL,BCAL,...) , event builder, data concentrators, event recorder, to find the slowest.  
Before the start of the run, there may be a 2h work in the tagger Hall If some microscope control boards need to be replaced with the now available spares. (Alex B.)
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##*Optimization includes different triggers and beam currents.  
Bias voltage study with 2 voltage settings. About 2×40min of data taking if we get about 1kHz PS trigger rate. This can be done parasitically to the FFB work.
+
##*FDC/CDC will be needed for about 30min with a 50-100nA current.  
Collect about 4h of data (should provide 1M events).
+
##*The detectors will be running the same hardware (no new fiber bundles for Fall15) and software as the previous run.
#* transition radiation detector (Lubomir P. and Sergei F.) Expected time: Parasitic to other Hall D activities.
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## Transition radiation detector (Lubomir P. and Sergei F.) Expected time: Parasitic to other Hall D activities.
#* Calorimeters, ST and TOF will take parasitic data (for their sake and because of the trigger/DAQ studies).
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## Calorimeters, ST and TOF will take parasitic data (for their sake and because of the trigger/DAQ studies).
  
 
* Expected Staffing and responsibilities:  
 
* Expected Staffing and responsibilities:  
 
**The Run Coordinator (RC, Alexandre Deur) oversees the commissioning.  
 
**The Run Coordinator (RC, Alexandre Deur) oversees the commissioning.  
 
**The Physics Division Liaison (PDL, Benedikt Zihlmann) and Hall D Work Coordinator/Safety Warden (T. Carstens) verify that the proper safety rules are followed.  
 
**The Physics Division Liaison (PDL, Benedikt Zihlmann) and Hall D Work Coordinator/Safety Warden (T. Carstens) verify that the proper safety rules are followed.  
**Shifts
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**Shifts: 2 persons per shift. The usual requirement that at least one of the shift taker has Solenoid training is not in effect for the Fall 15 run (Solenoid field will be off).
*** 2 persons per shift. The usual requirement that at least one of the shift taker has Solenoid training is not in effect for the Fall 15 run (Solenoid field will be off).
+
 
* Coordination Activities:
 
* Coordination Activities:
 
** The RC will attend the MCC meetings at 7:45am and 8:00am and the weekly MCC meeting (Wednesday, 1:30pm). The PDL will attend the weekly MCC meeting.
 
** The RC will attend the MCC meetings at 7:45am and 8:00am and the weekly MCC meeting (Wednesday, 1:30pm). The PDL will attend the weekly MCC meeting.
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* Useful links:
 
* Useful links:
 
**Accelerator schedule
 
**Accelerator schedule
***[Media:memo_and_schedule_20151113_public.pdf]
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***[https://halldweb.jlab.org/wiki/images/3/33/Memo_and_schedule_20151113_public.pdf long term calendar]
 
***[https://accweb.acc.jlab.org/calendar/  Scheduled Accelerator Down (SAD)/Maintenance Calendar]
 
***[https://accweb.acc.jlab.org/calendar/  Scheduled Accelerator Down (SAD)/Maintenance Calendar]
 
***[http://accboard.acc.jlab.org/ http://accboard.acc.jlab.org/]
 
***[http://accboard.acc.jlab.org/ http://accboard.acc.jlab.org/]

Revision as of 08:08, 2 December 2015

This page gives the run plan for the Fall 2015 commissioning. It is a controlled document that can be edited only by E. Chudakov, E. Smith, A. Deur or David Lawrence. Suggestions and comments should be send to them.

Items in red indicate missing information.

Items in pink indicate information requiring verification.

General Information

This document describes the run plan and procedures for the Hall D Fall 2015 commissioning.

  • Schedule for the Fall 2015 run. (Dates are according to the long term calendar. They will be updated if necessary in the run coordination meeting pages)
    1. Dec. 7th-8th Electron/Photon beam restoration (1 days)
    2. Dec. 8th-16th: Accelerator Fast Feedback commissioning and nA BPM commissioning. Meanwhile, we may parasitically conduct tagger detector tests. We may also have the beam available, typically during the night, to conduct our own commissioning.
  • Goals for the Spring 2015 run.
  1. Beam transport and control commissioning (accelerator responsibility):
    1. Position Fast Feedback: Trent Allison, Brian Bevins. Expected time: 40h.
    2. nA BPM: Trent Allison, Brian Bevins. Expected time: ?? h.
    3. Beam line model test: Todd Satogata). Expected time: 2 h.
  2. Continue commissioning of the Hall D equipment (Hall D responsibility):
    1. Tagger detectors commissioning (Richard J. and Alex B.). Expected time: 7h.
      • Bias voltage study can be done parasitically to the FFB work.
    2. PS, tagger detectors and trigger studies (Alex S.): Expected time: needs as much data as possible. Main magnetic field is not necessary. Calorimeters, SC and TOF need to be on during theses studies. Detailed plan needed from Alex S.
    3. Trigger tests at high current (μA): Alex S.
    4. DAQ (Sergey F). Expected time: about 1h of dedicated DAQ time each day.
      • The goal is to optimize DAQ performance : data rate, trigger rate, live time. Several parameters have to be defined for every DAQ components independently: detectors readout (for FDC,CDC,FCAL,BCAL,...) , event builder, data concentrators, event recorder, to find the slowest.
      • Optimization includes different triggers and beam currents.
      • FDC/CDC will be needed for about 30min with a 50-100nA current.
      • The detectors will be running the same hardware (no new fiber bundles for Fall15) and software as the previous run.
    5. Transition radiation detector (Lubomir P. and Sergei F.) Expected time: Parasitic to other Hall D activities.
    6. Calorimeters, ST and TOF will take parasitic data (for their sake and because of the trigger/DAQ studies).
  • Expected Staffing and responsibilities:
    • The Run Coordinator (RC, Alexandre Deur) oversees the commissioning.
    • The Physics Division Liaison (PDL, Benedikt Zihlmann) and Hall D Work Coordinator/Safety Warden (T. Carstens) verify that the proper safety rules are followed.
    • Shifts: 2 persons per shift. The usual requirement that at least one of the shift taker has Solenoid training is not in effect for the Fall 15 run (Solenoid field will be off).
  • Coordination Activities:
    • The RC will attend the MCC meetings at 7:45am and 8:00am and the weekly MCC meeting (Wednesday, 1:30pm). The PDL will attend the weekly MCC meeting.
    • Daily run meetings broadcasted on Bluejeans will occur at 8:45am in the counting house conference room. The Run Coordinator will be responsible for organizing and chairing the meeting.
  • Useful links:

Beam and Hall Configurations

  • Beam energy: expected: 12 GeV
  • Solenoid off.
  • Beam current: CW 5 na-3 μA. 250 MHz frequency.
  • Radiators:
    • Nominal:
      • 1.5 µm Al (1.7·10-5 R.L.)
      • 10 µm Al (11.2·10-5 R.L.)
      • 30 µm Al (33.7·10-5 R.L.)
    • The goniometer with the diamond radiator will not be used.
  • Collimator hole: 5 mm diameter.
  • Target: 10mm thick disk (3.19 cm diameter) of CH2 located on the nose of the ST. (HDPE, high density polyethylene, density 0.93-0.97 g/cm3 ), 0.95 g/cm2, ~1.2% R.L.
  • The LH2 target will be empty (i.e. with warm 2H gas at 1 atm.).
  • Solenoid cool down: May need accesses (controlled or restricted). This interferes with accelerator operation (even without beam in Hall D) since moving from Beam Permit to Controlled or Restricted access drop the injector PSS status.
  • List equipment that will not be used during the Fall 2015 run:
    • Goniometer.
    • Polarimeter.
    • Total Absorption Counter.

Run Plan

Overview

We expect a very limited amount of beam time (approx. 1 to 2 weeks) and will run a reduced program. The schedule of the runplan will be done once the accelerator commission plans (FFB, nA BPM) are finalized.

General information:

Restore Electron Beam

  • Accelerator responsibility.
  • Ion Chambers trip threshold must be set.
  • If Hall D tagger is used as a dump for CW beam during electron beam restoration then
    • Hall D RC must be notified.
    • Amorphous Radiator (and diamond) must be retracted. Collimator should be in blocking position.
    • Radiation levels should be closely monito#ff00ff by MCC crew.
      • Typical levels are (for radiator retracted, collimator fully blocking, electron beam current 50 nA)
        • RAD102_P1 ~ 3 mrad/hr (tagger area, gammas, between tagger and dump)
        • RAD102_P2 ~ 15 mrad/hr (tagger area, gammas, near electronics racks). This is with shield. Check shielding status.
        • RAD102_P3 ~ 0.005 mrem/hr (tagger area, neutrons, near electronics racks)
        • RAD101_P1 < 0.01 mrad/hr (collimator cave, gammas). This is with shield. Check shielding status.
    • Hall D tagger CARMS, Ion Chamber and BLM threshold for beam trips should not be changed without approval of Hall D leader.

Fast Feedback and nA commissioning. Beam transport and control commissioning.

  • Accelerator responsibility.
    1. The test will start at 1μA, and possibly 3μA. No radiator will be in place but, due to the nature of the commissioning, beam scrapping will certainly occur. FFB commissioning will be concluded by low current (5nA) nA-BPM commissioning.
    2. Beam line FOPT. About 2h of data. Data for beam energy stability study will be gathered at the same time.

Restore Photon Beam.

  1. Prerequisites:</b> Amorphous (and diamond) radiator retracted. Collimator should be in blocking position. Electron beam is restored and radiation levels are acceptable. Optional: Pair Spectrometer detectors/field on and its DAQ
  2. Call MCC to inform them we will Insert 2*10^-5 radiator. Insert the radiator. Check the beam position on the profiler. Adjust it if necessary. x and y should be 0±0.5cm. <b> If such adjustments are necessary, remind MCC that they should use only the last corrector (5C11A) to adjust the beam position. If the adjustment results in unacceptable e- beam position in the tagger dump, remind MCC that they should use the tagger magnet only to readjust the e- beam position in the tagger dump.
  3. Insert the 5mm collimator. Check beam position on the Profiler and Active collimator. Check that radiation levels are good. Run for 7min to gather enough data for radiation level studies.
    • Typical levels are (for 2*10^-5 radiator, electron beam current 50 nA)
      • RAD102_P1= 3-10 mrad/hr (tagger area, gammas, between tagger and dump)
      • RAD102_P2= ?10-20? mrad/hr (tagger area, gammas, near electronics racks) This is with shield. Check shielding status.
      • RAD102_P3= 0.500 mrem/hr (tagger area, neutrons, near electronics racks)
      • RAD101_P1= 12.0 mrad/hr (collimator cave, gammas).

Fast Active Collimator calibration (5 min)

  • Accelerator responsibility.

Fast Feedback and nA commissionings

  • Accelerator responsibility.