Difference between revisions of "Meeting 12 June 2020"

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* Other
 
* Other
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 +
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PARTICIPANTS: Donal Day, Igor Strakovsky, Josh Crafts, Tanja Horn, Sean Dobbs, Hamlet Mkrtchyan, Gabriel Niculescu, Vardan Tadevosyan, Rolf Ent, Bogdan Wojtsekhowski, Marie Boer, Steven Lassiter
 +
 +
 +
'''SUMMARY NOTES'''
 +
 +
'''SHIELDING AND MAGNET MODEL''' (Josh)
 +
 +
* Cu Core - was split into two pieces following advice from previous meeting
 +
::* No need to cut symmetrically, one side could be flat
 +
::* Ask Target Group about machining options
 +
 +
 +
* Cooling of the Cu Core
 +
::* '''Action Item''': Repeat cooling calculation using Josh's model (Gabriel)
 +
::::* all cooling in W-Cu area: make flat, rectangular cooling channel outside (on top of) the Cu core (could bolt on or other method) on each side and check
 +
::::* investigate optimal cooling by changing fractions of Cu and W-Cu areas used for cooling channels
 +
::::* investigation includes both distance and water temperature (<100 degrees to prevent boiling)
 +
 +
* How to feed water through shield to the core
 +
::* radiation level lowest at rear (upstream) end - could bring in cooling from there
 +
::* services could be nested, slotted, and come in from the side
 +
 +
 +
* Weight of the bottom shielding structure
 +
::* helpful to keep it modular to crane it in
 +
 +
* Discussion of questions about magnet:
 +
::* Magnet lifting points: typically designed in for magnet
 +
::* Magnet itself should sit on feet so can do alignment - typically fiducialize offline with a few points
 +
::* poles can be attach to magnet by two lifting points
 +
::::* hex, 5/8"-1" as minimum diameter (but magnet only 2 tons total, so maybe 1/2" bolts (x3) might be enough?)
 +
 +
 +
* '''Action item''': Josh: send step file to Steve Lassiter
 +
 +
 +
'''HALL D DESIGN''' (Sean)
 +
 +
* Beamline simulations completed - beam focused on KLong production target, no benefit for raster upstream as opposed to making beam larger, can increase size to a few cm
 +
 +
* CPS radiation simulation was sent to Igor - converting to MNCP6 code geometry
 +
 +
* '''Action Item''': Gabriel send simulation to Sean for cross checking in Geant4 directly
 +
 +
 +
'''TUNGSTEN'''
 +
 +
* Information gathering - investigating different options: purchase 17.5 g/cm3 solid (more expensive) or pressing powder
 +
 +
* For Be target area to be covered by W is relatively small
 +
 +
* Lead brick tolerance: ~1/16" typically
 +
 +
* Can use lead sheets as shims assuming all identical blocks (dimension and uniformity)
 +
 +
 +
'''NEXT MEETING: FRIDAY JUNE 26 at 11:00AM (ET)'''

Revision as of 12:25, 12 June 2020

Discussion items

  • Simulations: updates
  • Shielding and magnet model
  • Hall A/C model and design/implementation
  • Hall D design
  • NPS+CPS experiments
  • Other


PARTICIPANTS: Donal Day, Igor Strakovsky, Josh Crafts, Tanja Horn, Sean Dobbs, Hamlet Mkrtchyan, Gabriel Niculescu, Vardan Tadevosyan, Rolf Ent, Bogdan Wojtsekhowski, Marie Boer, Steven Lassiter


SUMMARY NOTES

SHIELDING AND MAGNET MODEL (Josh)

  • Cu Core - was split into two pieces following advice from previous meeting
  • No need to cut symmetrically, one side could be flat
  • Ask Target Group about machining options


  • Cooling of the Cu Core
  • Action Item: Repeat cooling calculation using Josh's model (Gabriel)
  • all cooling in W-Cu area: make flat, rectangular cooling channel outside (on top of) the Cu core (could bolt on or other method) on each side and check
  • investigate optimal cooling by changing fractions of Cu and W-Cu areas used for cooling channels
  • investigation includes both distance and water temperature (<100 degrees to prevent boiling)
  • How to feed water through shield to the core
  • radiation level lowest at rear (upstream) end - could bring in cooling from there
  • services could be nested, slotted, and come in from the side


  • Weight of the bottom shielding structure
  • helpful to keep it modular to crane it in
  • Discussion of questions about magnet:
  • Magnet lifting points: typically designed in for magnet
  • Magnet itself should sit on feet so can do alignment - typically fiducialize offline with a few points
  • poles can be attach to magnet by two lifting points
  • hex, 5/8"-1" as minimum diameter (but magnet only 2 tons total, so maybe 1/2" bolts (x3) might be enough?)


  • Action item: Josh: send step file to Steve Lassiter


HALL D DESIGN (Sean)

  • Beamline simulations completed - beam focused on KLong production target, no benefit for raster upstream as opposed to making beam larger, can increase size to a few cm
  • CPS radiation simulation was sent to Igor - converting to MNCP6 code geometry
  • Action Item: Gabriel send simulation to Sean for cross checking in Geant4 directly


TUNGSTEN

  • Information gathering - investigating different options: purchase 17.5 g/cm3 solid (more expensive) or pressing powder
  • For Be target area to be covered by W is relatively small
  • Lead brick tolerance: ~1/16" typically
  • Can use lead sheets as shims assuming all identical blocks (dimension and uniformity)


NEXT MEETING: FRIDAY JUNE 26 at 11:00AM (ET)