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Rogers, Chris, 06 May 2015 09:17

Phone Call 2015-05-14

Analysis phone call, 15:00 BST, Thursday 14th May 2015, RAL Conference Room CR10.

Phone Details


  • 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?


  • Actions
  • Issues Arising
  • Physics shifts - volunteers needed!
  • Field Mapping (Victoria Blackmore)
  • 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 attachment: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



Rob Ryne
Holge Witte
Jaroslaw Pasternak
John Nugent
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


  • 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)


  • 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...

Updated by Rogers, Chris about 9 years ago · 4 revisions