View source for Meeting 8 May 2020

'''DISCUSSION POINTS'''

* Simulations conclusions, updates, and next phase 
::* [https://wiki.jlab.org/cuawiki/images/3/33/CPS_next_phase_April.pdf Conclusions and next phase]
::* [https://wiki.jlab.org/cuawiki/images/c/c9/Gn_cps_update_05_20_2020_all.pdf Radiation Simulations Update]

* Shielding and magnet model CAD (Josh)
::* [https://wiki.jlab.org/cuawiki/images/d/d2/CPS_Initial_Design_Model.pptx CPS Initial Design Model]
* Hall A/C model and design/implementation (Steven, Mike, Paulo)

* NPS+CPS experiments

* Other


PARTICIPANTS:
Hamlet Mkrtchyan, Igor, Mike Fowler, Sean Dobbs, Tanja Horn, Paulo Medeiros, Mike CAD, Steven Lassiter, Vardan Tadevosyan, Vladimir Berdnikov, Marie Boer, Rolf Ent, Gabriel Niculescu, Dustin Keller, Donal Day, A Comer


'''SUMMARY NOTES'''

'''RADIATION SIMULATIONS UPDATE''' (Gabriel)

* Conclusion: we are "there" - Picked configuration mk_V
::* No need for pink plastic in front - keep lead there
::* Air in exit channel - important to pump, since would give radiological gases 
::* Need gate valve and window to separate scattering chamber from beam line (simulation has entrance window)


'''CONCLUSIONS: BRIDGING SIMULATION AND MECHANICAL DESIGN''' (Rolf, Josh, Tanja)

SUMMARY OF CONCLUSIONS AND SHIELDING SKETCHES
* Listing of radiation and material for mk_V

* Seems to suggest ~50 ton device

* Sketches of shielding configuration: side view, front view (how many bricks there are and how to stack them) - start at z=+5cm and estimate total height (155cm), width (180cm) and length (~200cm)

* Hall D KLong possible configuration

* Position magnet with respect to beam - narrow beam pipe hole (3mm), so need very accurate positioning
::* Perhaps change beam pipe to have tolerance on all sides
::* Mainly need good beam position - need to be able to align to better than 1mm

INITIAL CAD MODEL OF MAGNET AND SHIELDING

* Magnet pole piece is angled to increase the field
::* Note: no field clamp needed for CPS magnet

* Shielding model is still simplified - see action items below

* Next steps: 
::* Need to also take into account the assembly - which piece goes in first, plus:
::::* cooling, forces, services to magnet etc.
::::* outer containment for tungsten and poly - container to hold tungsten (stainless steel typically since it is heavy)
* Division of W-Cu insert should minimize heat transfer between segments
* Discussion of best way to interface with engineering/design team
::* Autodesk Inventor - should be able to transfer files

* '''Action Items''' - to address before turning over to engineering/design team
::* Cu-W inserts 
::* Form of W blocks - get information from vendor, Steven L. says Bert Metzger also did some work on this earlier, can check with him
::* Container for W blocks


'''CPS IN HALL C MODEL PRESENTATION''' (Mike)

* Discussion of the Hall C model including the CPS

* There are interferences - need to further discuss

* '''Action item:''' make ppt slides with screen shots


'''NPS+CPS EXPERIMENTS''' (Marie, Dustin, Vardan)

* Ongoing simulation efforts

* Background studies with pi+/pi- generator

* Plan to run several settings to optimize signal/background


'''NEXT MEETING: FRIDAY 29 MAY AT 11:00AM (ET)'''