Meeting 2 April 2021
From Cuawiki
DISCUSSION ITEMS
- Power deposition/stress calculations
- TCS Updates
- Other
PARTICIPANTS: Bogdan Wojsekthowski, Donal Day, Hamlet Mkrtchyan, Josh Crafts, Tanja Horn, Steven Lassiter, Vardan Tadevosyan, Amy Comer, Arshak Asaturyan, Gabriel Niculescu, Marie Boer
POWER DEPOSITION/STRESS CALCULATIONS (Bogdan, Amy, Steven L.)
- Investigations of stress with simplified model - applied 1kW - found that cuts help in reducing stress
- OPERA (usually used for EM fields) also allows to calculate stress - heat deposition only along z (segmented)
- Full 3D calculations with heat deposition in both z and x/y - requires many elements
- longer cu absorber would be good to better distribute heat (6 kW at end)
- investigate downstream heat distribution in more detail beyond cu
- upstream side: impact of beam missteering
- conjugate heat transfer; cooling efficiency - making good progress with FLUENT calculations
- Actions items:
- finalize stress with all cuts and distributions
- investigate material under radiation - in particular horizontal swelling
- investigate impact of misteering on upstream part - narrow piece, geometry dependent effect
- cross check calculations (Bogdan, Steven)
- absorber design getting close to starting with magnet design
- write design parameters (dump viewer, radiation monitor, etc.)
TCS UPDATES (Vardan)
- Polar angle dependence of rate - study any further reduction in background
- Background seems more concentrated at small polar angles - could reduce background by factor 2 to ~60kHz if cut on polar angle 8 degrees and reduce detection efficiency from 75% to 72%
- Action items
- further investigate timing (<50ns) - for trigger can use pulse rise time 3-5ns
- impact of magnetic field - could collect unpolarized data
NEXT MEETING: FRIDAY 16 APRIL AT 8:00AM ET