Meeting 25 March 2022

DISCUSSION TOPICS

• Engineering updates

• Slides
• Magnet coil drawing Tokin
• Magnet coil rotated 180 leads bent down (pdf version)

• TCS updates

• Status slides

• KPT Photon Source

• [1]

• Other

PARTICIPANTS: Amy Comer, Brannon Semp, Hamlet Mkrtchyan, Hovanes Egiyan, Igor Strakosvky, Steven Lassiter, Vardan Tadevosyan, Vitaly Baturin, David Hamilton, Tanja Horn, Rolf Ent, Bogdan Wojtsekhowski, Marie Boer,

MECHANICAL UPDATE

• Prototype - parts are being machined

• Next: cutting of the slots and radiation piece

• Prototype base cooling element redesigned

• CPS Magnet Coils - 3D model by Bert Metzger (see JT file)

• FLUENT modeling

• difficulties with current licensing configuration as more demand than licensing
• Action item: ask for another license

• Shielding material

• 280 W blocks of 440 blocks delivered from Elmet

• Action items:

• finish magnet design and drawings for procurement - still planned for this year

• re-design for single-wound coil
• check tolerances etc.

• prototype testing

• not needed for coils, yoke etc.

• shielding layout in CAD
• external W shielding in boxes for handling
• raster layout
• radiator design
• beamlines with Be windows
• N2 purge within magnet
• absorber final design

• LCW cooling of absorber - must be closed system

• cannot exceept 1 kW/month running
• Action item: running time for CPS?

FLUENT UPDATE

• Absorber temperature profile

• presented has cooling applied at bottom - see as a result differences between up/down

• cooling still needs to be implemented

• worked through entire problem and obtained solution - smooth distributions from model suggesting that all works as expected

TUNGSTEN MATERIAL

• Magnetization of tungsten shielding seems significant --> magnetic field --> force, which would be of concern for magnet coils

• some amount of Ni is ok, but when add additional iron then get the magnetization
• field in standard iron is 2T, much lower
• concern mainly because in Hall C have target close by
• with three times as many shielding blocks find a force of 400kg - order of magnitude too much for new magnet coil

• Implication to other tungsten? - need to check components carefully

HALLD UPDATE - PHOTON BEAM ALIGNMENT FOR KAON PRODUCTION TARGET

• Photon source model from CPS/HC setup

• Simulations suggest that need a compensation magnet (0.5m, 0.25T) to address fringe fields of main magnet - with this the photons are in center of Be converter

• No need to map the fringe fields

• Energy deposition at two locations of the converter

• Magnetic field map to z<-40cm - would be outside main magnetic field

• For Hall C it doesn't matter - go through field, e.g., dynamical polarized target (few T field) - result is a deflection and standard approach is to place corrector magnet to compensate for it

TCS UPDATE

• Overview of the dedicated TCS meeting on 3/24

• Plan is to submit the updated proposal at the upcoming PAC

• Action items:

• Marie will send reminder and zoom link for the next dedicated TCS meeting - weekly meetings are foreseen

NEXT CPS MEETING: FRIDAY APRIL 22ND AT 8:00AM ET