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 | + | 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 | + | 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. | ||
| Line 27: | Line 29: | ||
* 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 | ||
| Line 39: | Line 41: | ||
| − | SIMULATION | + | SIMULATION (Ho San) |
* Energy and dose rate distribution discussion | * Energy and dose rate distribution discussion | ||
| Line 46: | Line 48: | ||
::* 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 | ||
| Line 56: | Line 58: | ||
| − | CRYSTALS | + | 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 | ||
| + | |||
| + | * '''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)