PC-2016-06-17-brain¶

Friday 17th June 2016

Phone details¶

http://mice.iit.edu/phonebridge.html

Guidance¶

For discussion:

• We should consider a beam test using MICE equipment
• Descope came in at 3-4 M£ and was rejected, so presumably something cheaper
• RF hardware alone is > 1 M£
• RF test (a la MTA programme) is probably not sufficiently convincing to get funding so would like a beam test
• would like to show a "lattice cell" i.e. we have control of the beam in and out of the cell (and emittance is reduced)

"Worked example":

• Consider MICE Step IV with RF replacing FC 2016-06-17_rogers_dedescope.pdf

Notes¶

Present:
Dan Kaplan
Milorad Popovic
John Cobb
Dave Neuffer
Ajit
Adam Dobbs
Paul Kyberd
Yingpeng
Victoria
Francois
Mark Tucker

Rogers showed slides demonstrating possible revised step IV optics

• Jaroslaw has reproduced optics result on slide 3, but with solenoid mode
• Noted that if we use LiH absorber we would need new support
• Noted that there is about 20 cm extra room around the RF cavity
• Noted that one could do the energy change measurement at 3 T; then do the emittance reduction measurement at lower field (with reduced resolution measurement of energy change)

Melissa suggested possible physics goals

• Reacceleration
• Emittance reduction
• Operation of RF in magnetic field (w/o increasing the transverse emittance)
  • Hard to achieve with existing hardware
  • Note possibility to move the PRY end plate, perhaps bringing the field out onto the RF cavity

Victoria/Melissa suggested putting RF between TOF and SSU? or RF between SSD and EMR

• Note vacuum issues
• Not studying coupling of cooling to RF
  Victoria noted that we may not need a PRY, or may not require end plates. This may make the placement of RF easier

Victoria proposed doing a downstream measurement only

• Rogers asserted that one would need a movable absorber - RF
• Paul Kyberd suggested a semi-circular absorber - emittance reduction in half

Dan noted that we can try to unlock STFC/others with new, compelling physics goal
Chris Rogers Noted that we can try to unlock STFC/others with reduced price tag

• Paul Soler's guidance (guess) was <~ 1 M£ cost to STFC
• There was discussion about how the cost can be reduced; take risk on RF install
• Save by reducing shut down between step iv and cooling demo
  • Skimp on RF; with implicit risk
  • Removing effort to redo the SSD region/civil engineering
  • Reducing the schedule (and associated standing army costs)

Propose:

• Let the study settle; see how the politics/money develops; then revise the analysis if it looks like it is viable
• Paul Soler requested a MC study of the cooling performance/momentum change by Monday 27th June; Rogers agreed