Phone Call 2015-04-30¶

Analysis phone call, 15:00 BST, Thursday 30th April 2015, RAL Conference Room CR10.

Phone Details¶

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

Actions¶

• ACTION (Pasternak/Rogers): determine magnetic settings routine - do we imagine "equivalent coil"? Implement iron in MAUS? Run everything through OPERA?
• ACTION (Rogers): Tolerances - controls people ask what are the tolerances on magnet current

RLSR/MPB Actions¶

• ACTION Rogers: Review the requirements for accurate end-to-end simulation
• ACTION Rogers: Report, in a MICE note to the collaboration, the definitions and methods used for the determination of the betatron functions and emittances.
• ACTION Rogers: Carry out an independent review of the beam dynamics analysis
• ACTION Rogers: Define strategies to provide online feedback, quickly

Actions following Run planning meeting¶

• ACTION (Nugent): Estimate data rate with cooling channel magnets off
  • Still waiting on good April data - this weekend?

Agenda¶

• Actions
• Issues Arising
• Physics shifts - volunteers needed!
• Field Mapping (Victoria Blackmore)
  • tracking_measured_misalignments.pdf - Chris Rogers
• Step IV Technical Paper
  • MICE Muon Beamline (Jaroslaw Pasternak)
  • Detectors (Melissa Uchida)
    • Alignment Measurement
    • Efficiency
    • Residuals
  • Particle ID (Celeste Pidcott)
  • Measurement of magnetic alignment (Chris Rogers)
  • Quality of transported beam (Chris Hunt)
• Step IV First Demonstration of Cooling (Chris Rogers)
• Step I Papers (Victoria Blackmore)
  • EMR paper
  • Pion contamination
• MICE Demonstration of Ionisation Cooling (Jaroslaw Pasternak)
  • Lattice close out by CM41; paper first revision soon afterwards
• Magnetics
  • Non-linear beam optics/measurement(Rob Ryne)
• Absorber and material physics
  • Scattering measurement
  • Energy loss measurement
  • Beam (de)polarisation analysismeeting300415.pdf
• Support
  • Batch Production (Ryan Bayes)
  • X-BOA (Chris Rogers)
  • Online Analysis Tool (Chris Rogers)
  • Trigger analysis (Chris Rogers)
• Date of next meeting
  • April 30th
  • (May 6th, VC)
  • May 14th
  • May 21st - clash with MAP workshop
  • May 28th
  • June 4th
  • June 11th
  • (CM 42: June 22-24) - we may want to have an analysis workshop around the CM

Notes¶

Present¶

Rob Ryne
Holge Witte
Jaroslaw Pasternak
John Nugent
Joe
Adam Dobbs

Field Off Trigger Rate¶

• Solenoid fields off triggers at TOF1 44000 TOF2 1000
• Solenoid fields on triggers at TOF1 53000 TOF2 43000
  • => 3 % rate scaling; but run with TOF2 trigger; so limit comes from ISIS/target
• 120 triggers per spill with the Decay Solenoid at TOF1, not including tracker deadtime
• Jaroslaw notes attempt to optimise was not successful

Physics shifter¶

• Seek to get the physics devil automated

Beamline¶

• Validated calibration
• Checked some old settings
• Made two additional settings to match to diffuser
• Made two additional settings to optimise for "straight tracks"
• Seeking to validate MC

EMR Papers¶

• Review next week (Tuesday)

Pion contamination¶

• See slides
• Feldman-Cousins?
  • Frequentist method based on likelihood ratio; can deal in an automatic way with statistical results that fall outside of physically allowed; determines upper limit or two sided;
  • Paul Soler suggests alternatively use Bayesian method (e.g. Higgs papers)

MDIC¶

• Final coil positions by MAP meeting
• Use IPAC paper as starting point for PR-ST AB paper

Error Fields¶

• Slide 4: cusps come from the mesh
• Slide 4: symmetry point is at -2.75; tracker is at around -4.75 to -5.75
• Few * 10^-4 T in the tracker azimuthal
• Slide 9: units are T at 0.15 m
  Solenoid fields in 2 weeks time

Non-linear beam optics¶

• Looking at the 6x6 problem...