Difference between revisions of "Photon Beam Commissioning Discussion July 23, 2014"

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== References ==
 
== References ==
  
−
* [https://hdops.jlab.org/wiki/index.php/Hall_D_Commissioning Hall D Commissioning Pages]
+
* [https://halldweb.jlab.org/hdops/wiki/index.php/Hall_D_Commissioning Hall D Commissioning Pages]
 
* [[Media:HallD_beam_delivery_proc_1b9.pdf‎ | DRAFT Accelerator Hall D Beam Delivery Procedures(V.1b9)]]
 
* [[Media:HallD_beam_delivery_proc_1b9.pdf‎ | DRAFT Accelerator Hall D Beam Delivery Procedures(V.1b9)]]
 
* [[Media:Tagger_operation_procedure.docx | DRAFT Accelerator Tagger Magnet Operation Procedures(V. 0)]]
 
* [[Media:Tagger_operation_procedure.docx | DRAFT Accelerator Tagger Magnet Operation Procedures(V. 0)]]
Line 18: Line 18:
 
== Action Items ==
 
== Action Items ==
  
−
* Send Todd a geometry of tagger area, including the mapped tagger magnet field, for GEANT simulations (Richard). Sasha says he will do this
+
* Send Todd a geometry of tagger area, including the mapped tagger magnet field, for GEANT simulations (Richard). Sasha defined geometry, Richard will add field map
 
* Estimate rates and ranges of parameters needed for the photon beam tuning (Todd for accelerator; Elton, Hovanes, Alexandre for Hall D)
 
* Estimate rates and ranges of parameters needed for the photon beam tuning (Todd for accelerator; Elton, Hovanes, Alexandre for Hall D)
  
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# Announcements
 
# Announcements
 
# Electron Commissioning (Todd/Mike)
 
# Electron Commissioning (Todd/Mike)
−
##Hall D Beam Delivery Procedure heading to Rev. 10 with feedback received.
+
# Photon Commissioning Draft (Alexandre)
−
##Ion Chamber Procedures currently under review for release for use.
+
# Radiation monitors
−
##Eugene/Curtis added as administrators for Hall D Operational Restrictions[http://opsweb.acc.jlab.org/internal/ops/ops_webpage/restrictions/ops_restrictions.html]
+
# Aug 8 Review:
−
##System Experts requested to write test plans for nA BPM, FFB, and Active Collimator hardware commissioning.  
+
#* [http://www.jlab.org/Hall-D/halld_secure/reviews/PhotonBeamCommissioning_Internal_Aug2014/ Photon Beam Commissioning Review Page]
−
##Cross Calibration Procedure for absolute current measurement desired?
+
# Other business
−
##Point of contact in Radcon for measurement test plan for fall? (George or Pavel perhaps?)
+
 
−
##Regarding minimum deliverable current:  
+
== Minutes ==
 +
 
 +
''Attending: Elton, Alexandre, Hovanes, Eugene, Sasha (Hall D), Mike (Ops); Curtis (CMU); Richard (UConn)
 +
 
 +
# Action Items
 +
#* Sasha has updated geometry in tagger area. Richard will add the magnetic field produced by Dan. If time is short, the TOSCA map can be used.
 +
# Electron Commissioning (Mike)
 +
#*The Hall D Beam Delivery Procedure is heading toward Rev. 10 with the feedback which was received.
 +
#*Ion Chamber Procedures are currently under review for release and use.
 +
#*Eugene/Curtis have been added as administrators for Hall D's Operational Restrictions[http://opsweb.acc.jlab.org/internal/ops/ops_webpage/restrictions/ops_restrictions.html]
 +
#*System Experts have been requested to write test plans for hardware commissioning of the nA BPMs, FFB system, and the Active Collimator.
 +
#*Is a Cross Calibration Procedure for absolute current measurement desired? (Between Faraday Cup 2 in the Injector and the Hall BCM)
 +
#** Not needed at this time.
 +
#*Need to identify the appropriate point of contact in Radcon to write the measurement test plan for fall (George K. or Pavel perhaps?)
 +
#** Alexandre is in communication with Melvin Washington to coordinate plans for monitoring (see below)
 +
#*Regarding minimum deliverable current (open question from last time):  
 
{| class="wikitable" style="text-align: center; color: black;"
 
{| class="wikitable" style="text-align: center; color: black;"
 
|Stripline BPM Resolutions
 
|Stripline BPM Resolutions
Line 36: Line 51:
 
|< 30nA resolution suffers(position noisy barring additional filtering)
 
|< 30nA resolution suffers(position noisy barring additional filtering)
 
|3nA yields expected resolution ≈ 300 µm  
 
|3nA yields expected resolution ≈ 300 µm  
−
|}
+
|}  
 
# Photon Commissioning Draft (Alexandre)
 
# Photon Commissioning Draft (Alexandre)
 +
## Rates
 +
##*  Estimate of expected rates (Eugene will work on rates for the PS and the profile monitor)
 +
##* Need to get range of motion specifications for all devices
 +
## Procedures for checking individual detectors
 +
##* Beam commissioning can assume beamline detectors are working, but entry should point to procedure for checking/commissioning each detector subsystem, e.g. 'expert procedures' in the documentation wiki
 +
## Plan for commissioning
 +
##* Centering on target: use start counter? profiler upstream of target?
 +
##* Decided that we should plan to use the profiler at a) collimator b) upstream of target  and c) upstream of beam dump. Hovanes/ Alexandre will coordinate with Tim to make appropriate stands.
 +
##* (Hovanes) Current plan is to use a portable VME crate for the profile monitor. Access to LV near the dump is problematic and will have to be worked out.
 
# Radiation monitors
 
# Radiation monitors
 +
#* Alexandre has been working with RadCon to borrow detectors that can be used this fall in the tagger area and Hall D
 +
#* 4 probes: 2 n and 1 g in tagger hall; 1 g in collimator cave
 +
#* 40 personnel dosimeters (OSLs), most to be placed in the tagger hall, some in Hall D
 
# Aug 8 Review:
 
# Aug 8 Review:
 +
#* [http://www.jlab.org/Hall-D/halld_secure/reviews/PhotonBeamCommissioning_Internal_Aug2014/ Photon Beam Commissioning Review Page]
 +
#* Review of information on Review page - Elton will update based on feedback
 +
#* Material for the review due July 29 evening: draft of presentations and all pre-brief material
 
# Other business
 
# Other business
−
 
+
#* Next meeting: Tuesday July 29, 4 pm
−
== Minutes ==
+
−
 
+
−
''Attending:'
+

Latest revision as of 06:20, 1 April 2015

Organization

  • Time: 4 pm EST
  • Connecting: detailed instructions are here
  • Conference id: 536076821

References

Action Items

  • Send Todd a geometry of tagger area, including the mapped tagger magnet field, for GEANT simulations (Richard). Sasha defined geometry, Richard will add field map
  • Estimate rates and ranges of parameters needed for the photon beam tuning (Todd for accelerator; Elton, Hovanes, Alexandre for Hall D)

Agenda

  1. Announcements
  2. Electron Commissioning (Todd/Mike)
  3. Photon Commissioning Draft (Alexandre)
  4. Radiation monitors
  5. Aug 8 Review:
  6. Other business

Minutes

Attending: Elton, Alexandre, Hovanes, Eugene, Sasha (Hall D), Mike (Ops); Curtis (CMU); Richard (UConn)

  1. Action Items
    • Sasha has updated geometry in tagger area. Richard will add the magnetic field produced by Dan. If time is short, the TOSCA map can be used.
  2. Electron Commissioning (Mike)
    • The Hall D Beam Delivery Procedure is heading toward Rev. 10 with the feedback which was received.
    • Ion Chamber Procedures are currently under review for release and use.
    • Eugene/Curtis have been added as administrators for Hall D's Operational Restrictions[1]
    • System Experts have been requested to write test plans for hardware commissioning of the nA BPMs, FFB system, and the Active Collimator.
    • Is a Cross Calibration Procedure for absolute current measurement desired? (Between Faraday Cup 2 in the Injector and the Hall BCM)
      • Not needed at this time.
    • Need to identify the appropriate point of contact in Radcon to write the measurement test plan for fall (George K. or Pavel perhaps?)
      • Alexandre is in communication with Melvin Washington to coordinate plans for monitoring (see below)
    • Regarding minimum deliverable current (open question from last time):
Stripline BPM Resolutions ≥ 30nA 100um resolution < 30nA resolution suffers(position noisy barring additional filtering) 3nA yields expected resolution ≈ 300 µm
  1. Photon Commissioning Draft (Alexandre)
    1. Rates
      • Estimate of expected rates (Eugene will work on rates for the PS and the profile monitor)
      • Need to get range of motion specifications for all devices
    2. Procedures for checking individual detectors
      • Beam commissioning can assume beamline detectors are working, but entry should point to procedure for checking/commissioning each detector subsystem, e.g. 'expert procedures' in the documentation wiki
    3. Plan for commissioning
      • Centering on target: use start counter? profiler upstream of target?
      • Decided that we should plan to use the profiler at a) collimator b) upstream of target and c) upstream of beam dump. Hovanes/ Alexandre will coordinate with Tim to make appropriate stands.
      • (Hovanes) Current plan is to use a portable VME crate for the profile monitor. Access to LV near the dump is problematic and will have to be worked out.
  2. Radiation monitors
    • Alexandre has been working with RadCon to borrow detectors that can be used this fall in the tagger area and Hall D
    • 4 probes: 2 n and 1 g in tagger hall; 1 g in collimator cave
    • 40 personnel dosimeters (OSLs), most to be placed in the tagger hall, some in Hall D
  3. Aug 8 Review:
    • Photon Beam Commissioning Review Page
    • Review of information on Review page - Elton will update based on feedback
    • Material for the review due July 29 evening: draft of presentations and all pre-brief material
  4. Other business
    • Next meeting: Tuesday July 29, 4 pm
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