View source for Meeting 25 March 2022

DISCUSSION TOPICS

* Engineering updates
::* [https://wiki.jlab.org/cuawiki/images/2/20/CPS-3-25-2022.pptx Slides]
::* [https://wiki.jlab.org/cuawiki/images/0/0f/CPS_COIL-tokin.pdf Magnet coil drawing Tokin]
::* [https://wiki.jlab.org/cuawiki/images/9/9d/CPS_MAGNET_coil_rotated_180_leads_bent_down_3-24-22.pdf Magnet coil rotated 180 leads bent down (pdf version)]

* TCS updates
::* [https://wiki.jlab.org/cuawiki/images/e/e9/HC_TCS_status.pdf Status slides]
* KPT Photon Source 
::* [https://docs.google.com/presentation/d/1FWep3AkO79j_9ak5NH6dIMGmpTgOoKl25h5eScq24kY/edit#slide=id.g11f053c7e3d_0_63]

* 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'''