Difference between revisions of "General Meeting Summary 11/21/19"

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(Created page with "NPS COLLABORATION MEETING AGENDA * Add item: assembly plan for frame (wrapping crystals, etc.) * Assembly space: need place until run (full assembly with electronics, DAQ,.....")
 
 
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NPS COLLABORATION MEETING AGENDA
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NPS COLLABORATION MEETING AGENDA (Tanja)
  
 
* Add item: assembly plan for frame (wrapping crystals, etc.)
 
* Add item: assembly plan for frame (wrapping crystals, etc.)
  
 
* Assembly space: need place until run (full assembly with electronics, DAQ,...)
 
* Assembly space: need place until run (full assembly with electronics, DAQ,...)
 +
 +
* '''Action item''': make edits to agenda and post
  
  
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PMT MAGNETIC SHIELDING
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PMT MAGNETIC SHIELDING (Bogdan)
  
 
* Aims to protect PMTs when the calorimeter is close to the magnet and simultaneously keep material in front of the calorimeter at a minimum to not impact resolution.  
 
* Aims to protect PMTs when the calorimeter is close to the magnet and simultaneously keep material in front of the calorimeter at a minimum to not impact resolution.  
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* Practically such additional shielding could be bolted on with a minimum number of bolts to minimize installation time (radiation consideration)
 
* Practically such additional shielding could be bolted on with a minimum number of bolts to minimize installation time (radiation consideration)
  
* Action Item: explicit calculations for 3 meters with field 0.3 T
+
* '''Action Item''': explicit calculations for 3 meters with field 0.3 T
  
  
FRAME
+
FRAME (Carlos)
  
 
* In the process of procuring the final components/pieces
 
* In the process of procuring the final components/pieces
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SIMULATION
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SIMULATION (Ho San)
  
 
* Energy and dose rate distribution discussion
 
* Energy and dose rate distribution discussion
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::* Low energy particles dominate dose before the magnet, then remove e-/e+ and have only photons at low energy, high energy part not so simple to remove
 
::* Low energy particles dominate dose before the magnet, then remove e-/e+ and have only photons at low energy, high energy part not so simple to remove
  
* Action Item: Bogdan will send the latest magnetic field map to Ho San
+
* '''Action Item:''' Bogdan will send the latest magnetic field map to Ho San and simulations will be done with it
  
  
HV DIVIDERS
+
HV DIVIDERS (Vladimir, Sasha)
  
 
* Table with available models and their measured resolutions and nonlinearities (3x3 prototype) being prepared
 
* Table with available models and their measured resolutions and nonlinearities (3x3 prototype) being prepared
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CRYSTALS
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CRYSTALS (Vladimir et al.)
  
 
* Instrumentation paper to be posted soon
 
* Instrumentation paper to be posted soon
  
 
* Full NPS construction paper to follow
 
* Full NPS construction paper to follow
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 +
* '''Action item:''' submit crystal paper
  
  
 
NEXT MEETING: THURSDAY 19 DECEMBER AT 9:00AM (ET)
 
NEXT MEETING: THURSDAY 19 DECEMBER AT 9:00AM (ET)

Latest revision as of 16:24, 22 November 2019

NPS COLLABORATION MEETING AGENDA (Tanja)

  • Add item: assembly plan for frame (wrapping crystals, etc.)
  • Assembly space: need place until run (full assembly with electronics, DAQ,...)
  • Action item: make edits to agenda and post


MAGNET

  • Tests ongoing


PMT MAGNETIC SHIELDING (Bogdan)

  • Aims to protect PMTs when the calorimeter is close to the magnet and simultaneously keep material in front of the calorimeter at a minimum to not impact resolution.
  • Concept: double shielding with mu-metal (inside) and iron (outside). The best shape is a box.
  • Large magnet aperture as required for large solid angle - large flux that needs to be shielded. Shielding at magnet coils directly has no significant effect, so use a shielding box enclosure around the calorimeter.
  • Primary flux can be removed with iron. 1 layer is standard, but here use two layers as default to reduce the field to below 0.2 G.
  • Shielding for different configurations with field 0.6 T:
  • at 4 meters: 2 mm iron in front and 1 mm at sides of Calorimeter
  • at 3 meters: >~6 mm iron required (5 mm s not sufficient)
  • Practically such additional shielding could be bolted on with a minimum number of bolts to minimize installation time (radiation consideration)
  • Action Item: explicit calculations for 3 meters with field 0.3 T


FRAME (Carlos)

  • In the process of procuring the final components/pieces
  • Assembly is on schedule
  • Meetings with engineers being planned around the NPS collaboration meeting


SIMULATION (Ho San)

  • Energy and dose rate distribution discussion
  • dose comes from higher energy parts - so can change magnet BdL, but not much impact since dose dominated by high energy
  • From the plots one can see that in certain regions have less dependence on magnetic field
  • Low energy particles dominate dose before the magnet, then remove e-/e+ and have only photons at low energy, high energy part not so simple to remove
  • Action Item: Bogdan will send the latest magnetic field map to Ho San and simulations will be done with it


HV DIVIDERS (Vladimir, Sasha)

  • Table with available models and their measured resolutions and nonlinearities (3x3 prototype) being prepared
  • Anode current measurements planned in Hall D


CRYSTALS (Vladimir et al.)

  • Instrumentation paper to be posted soon
  • Full NPS construction paper to follow
  • Action item: submit crystal paper


NEXT MEETING: THURSDAY 19 DECEMBER AT 9:00AM (ET)