PC-2015-05-14 » History » Revision 2

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Rogers, Chris, 06 May 2015 09:15

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

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 · 2 revisions