Difference between revisions of "Photon Beam Commissioning Discussion Sep 10, 2014"

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* Estimate rates and ranges of parameters needed for the photon beam tuning (Todd for accelerator; Eugene, Alexandre for Hall D)
 
* Estimate rates and ranges of parameters needed for the photon beam tuning (Todd for accelerator; Eugene, Alexandre for Hall D)
 
** Need rates for profiler, start counter, ps
 
** Need rates for profiler, start counter, ps
−
* Richard will provide a "sacrificial" board with 30 SiPMs to register neutron damage during initial electron beam tune.
+
* <strike> Richard will provide a "sacrificial" board with 30 SiPMs to register neutron damage during initial electron beam tune. </strike>
−
* Complete the tagger layout with the expected configuration for the fall running, including all shielding. (Tim, Chuck, Elton)
+
* Complete the tagger drawing with the expected configuration for the fall running, including all shielding. (Tim, Chuck, Elton)
−
 
+
  
 
== Agenda ==
 
== Agenda ==
Line 28: Line 27:
 
== Minutes ==
 
== Minutes ==
  
−
''Attending:
+
''Attending: Elton, Alexandre, Eugene, Hovanes, Tim, Glenn (Hall D); Pavel (RadCon); Richard (UConn); Curtis (CMU);
 +
 
 +
# Announcements
 +
#* Power outage across the accelerator site; Hall D lost power for about 20 min - most systems restored. One compressor of Hall D refrigerator failed. Accelerator is recovering. Systems in Hall D are coming back on. The UPS in the counting room maintained power throughout the outage
 +
# Action items
 +
## Sacrificial board
 +
##* Richard will send an e-mail to Alex to work with Alexandre to make a sacrificial board available for checking degradation during initial beam tune.
 +
##* Richard/Alex will measure dark current before beam tuning for comparison with measurements afterwards
 +
##* Alexandre has OSPs that will be used to determine the integrated dose during the initial beam tuning.
 +
##* The sacrificial board will be shielded together with one OSP, another OSP will be placed nearby outside the shielding to determine its effectiveness.
 +
## Mounting prepamplifiers near collimator
 +
##* Richard says the cables are 63 cm long, which limits where these can be placed
 +
##* Alexandre will coordinate with Alex on equipping the active collimator and placement of the preamplifer boards.
 +
## Moving the microscope into the tagger hall
 +
##* Richard argued successfully for moving the microscope into the tagger hall before initial commissioning. Tim will check that there is sufficient manpower
 +
##* The move will be done early in order to check that all pieces fit into place before commissioning.
 +
##* The electronic boards will be removed for the commissioning (as well as electronics)
 +
##* UConn manpower: Brendan has returned to Conn. Alex has moved here. Jim will stay till microscope move has been completed.
 +
# Accelerator and Hall D Interface Document - update
 +
#* Elton has updated the document based on input from Richard, Mike and Alexandre.
 +
#* Once Mike provides more input, the document should be close to final and ready for wider circulation
 +
# Update on Photon Commissioning (Alexandre)
 +
## Slow controls (Hovanes)
 +
##*  Hovanes is workin gon the Beam profiler
 +
##* Vanik is working on the harp scans
 +
## Halo monitors
 +
##* Nick/Chris have lengths and are making cables, will then install them
 +
##* Waiting for caps needed to assemble pmts
 +
## Survey
 +
##* Started working in tagger hall
 +
##* Will move next to collimator hut
 +
##* Richard: alignment of active collimator on collimator should be checked using a 5mm pin that fits both the collimator hole and the aperture of the active collimator
 +
## Radiator motor and switch will be installed and stay in tagger hall.
 +
##* At the moment, the VME crates can be reset remotely, HV crates soon. Switches are not.
 +
# [[Beam Simulations]]
 +
#* Richard has updated the geometry as discussed previously.
 +
# RadCon update
 +
#* Melvin relocating monitors. Moving probes from the outside of the truck ramp inside
 +
#* Working with Alexandre to place probes inside the tagger hall and in the collimator hut.
 +
#* Alexandre has in hand 40 OSL personel dosimeters that will be used to measure integrated dose during initial commissioning at various locations in the tagger hall and the collimator hut.
 +
#* Gap between polyethylene door to labyrinth in tagger hall has been filled with concrete blocks.
 +
#* Richard will update the GEANT model with concrete instead of iron.
 +
# Other business
 +
#* Daily meetings: 8:30 daily meetings will begin in Hall D to cover installation activities
 +
#* Connections will be made in the conference room using the GlueX bi-weekly number
 +
#* Meetings will begin Friday, delayed by one day since the 8:00 acc meeting might be long due to the outage.

Latest revision as of 17:59, 10 September 2014

Organization

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

References

Action Items

  • Estimate rates and ranges of parameters needed for the photon beam tuning (Todd for accelerator; Eugene, Alexandre for Hall D)
    • Need rates for profiler, start counter, ps
  • Richard will provide a "sacrificial" board with 30 SiPMs to register neutron damage during initial electron beam tune.
  • Complete the tagger drawing with the expected configuration for the fall running, including all shielding. (Tim, Chuck, Elton)

Agenda

  1. Announcements
  2. Accelerator and Hall D Interface Document - update
  3. Update on Photon Commissioning (Alexandre)
  4. Beam Simulations
  5. RadCon update
  6. Other business

Minutes

Attending: Elton, Alexandre, Eugene, Hovanes, Tim, Glenn (Hall D); Pavel (RadCon); Richard (UConn); Curtis (CMU);

  1. Announcements
    • Power outage across the accelerator site; Hall D lost power for about 20 min - most systems restored. One compressor of Hall D refrigerator failed. Accelerator is recovering. Systems in Hall D are coming back on. The UPS in the counting room maintained power throughout the outage
  2. Action items
    1. Sacrificial board
      • Richard will send an e-mail to Alex to work with Alexandre to make a sacrificial board available for checking degradation during initial beam tune.
      • Richard/Alex will measure dark current before beam tuning for comparison with measurements afterwards
      • Alexandre has OSPs that will be used to determine the integrated dose during the initial beam tuning.
      • The sacrificial board will be shielded together with one OSP, another OSP will be placed nearby outside the shielding to determine its effectiveness.
    2. Mounting prepamplifiers near collimator
      • Richard says the cables are 63 cm long, which limits where these can be placed
      • Alexandre will coordinate with Alex on equipping the active collimator and placement of the preamplifer boards.
    3. Moving the microscope into the tagger hall
      • Richard argued successfully for moving the microscope into the tagger hall before initial commissioning. Tim will check that there is sufficient manpower
      • The move will be done early in order to check that all pieces fit into place before commissioning.
      • The electronic boards will be removed for the commissioning (as well as electronics)
      • UConn manpower: Brendan has returned to Conn. Alex has moved here. Jim will stay till microscope move has been completed.
  3. Accelerator and Hall D Interface Document - update
    • Elton has updated the document based on input from Richard, Mike and Alexandre.
    • Once Mike provides more input, the document should be close to final and ready for wider circulation
  4. Update on Photon Commissioning (Alexandre)
    1. Slow controls (Hovanes)
      • Hovanes is workin gon the Beam profiler
      • Vanik is working on the harp scans
    2. Halo monitors
      • Nick/Chris have lengths and are making cables, will then install them
      • Waiting for caps needed to assemble pmts
    3. Survey
      • Started working in tagger hall
      • Will move next to collimator hut
      • Richard: alignment of active collimator on collimator should be checked using a 5mm pin that fits both the collimator hole and the aperture of the active collimator
    4. Radiator motor and switch will be installed and stay in tagger hall.
      • At the moment, the VME crates can be reset remotely, HV crates soon. Switches are not.
  5. Beam Simulations
    • Richard has updated the geometry as discussed previously.
  6. RadCon update
    • Melvin relocating monitors. Moving probes from the outside of the truck ramp inside
    • Working with Alexandre to place probes inside the tagger hall and in the collimator hut.
    • Alexandre has in hand 40 OSL personel dosimeters that will be used to measure integrated dose during initial commissioning at various locations in the tagger hall and the collimator hut.
    • Gap between polyethylene door to labyrinth in tagger hall has been filled with concrete blocks.
    • Richard will update the GEANT model with concrete instead of iron.
  7. Other business
    • Daily meetings: 8:30 daily meetings will begin in Hall D to cover installation activities
    • Connections will be made in the conference room using the GlueX bi-weekly number
    • Meetings will begin Friday, delayed by one day since the 8:00 acc meeting might be long due to the outage.
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