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PC-2015-04-30 » History » Version 16

Rogers, Chris, 06 May 2015 09:18

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h1. Phone Call 2015-04-30
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Analysis phone call, 15:00 BST, Thursday 30th April 2015, RAL Conference Room CR10.
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h2. Phone Details
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http://mice.iit.edu/phonebridge.html
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h2. Actions
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* ACTION  *(Pasternak/Rogers)*: determine magnetic settings routine - do we imagine "equivalent coil"? Implement iron in MAUS(!)? Run everything through OPERA?
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* ACTION *(Rogers)*: Tolerances - controls people ask what are the tolerances on magnet current
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h2. RLSR/MPB Actions
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* ACTION *Rogers*: Review the requirements for accurate end-to-end simulation
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* ACTION *Rogers*: Report, in a MICE note to the collaboration, the definitions and methods used for the determination of the betatron functions and emittances.
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* ACTION *Rogers*: Carry out an independent review of the beam dynamics analysis
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* ACTION *Rogers*: Define strategies to provide online feedback, quickly
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h2. Actions following Run planning meeting
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* ACTION *(Nugent)*: Estimate data rate with cooling channel magnets off
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** Still waiting on good April data - this weekend?
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h2. Agenda
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* Actions
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* Issues Arising
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* [[Physics shifts]] - volunteers needed!
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* Field Mapping (*Victoria Blackmore*)
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** attachment:tracking_measured_misalignments.pdf - Chris Rogers
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* Step IV Technical Paper
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** MICE Muon Beamline (*Jaroslaw Pasternak*)
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** Detectors (*Melissa Uchida*)
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*** Alignment Measurement
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*** Efficiency
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*** Residuals
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** Particle ID (*Celeste Pidcott*)
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** Measurement of magnetic alignment (*Chris Rogers*)
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** Quality of transported beam (*Chris Hunt*)
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* Step IV First Demonstration of Cooling (*Chris Rogers*)
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* Step I Papers (*Victoria Blackmore*)
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** EMR paper
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** Pion contamination
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* MICE Demonstration of Ionisation Cooling (*Jaroslaw Pasternak*)
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** Lattice close out by CM41; paper first revision soon afterwards
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* Magnetics
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** Non-linear beam optics/measurement(*Rob Ryne*)
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* Absorber and material physics
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** Scattering measurement
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** Energy loss measurement
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** Beam (de)polarisation attachment:analysismeeting300415.pdf
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* Support
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** Batch Production (*Ryan Bayes*)
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** X-BOA (*Chris Rogers*)
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** Online Analysis Tool (*Chris Rogers*)
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** Trigger analysis (*Chris Rogers*)
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* Date of next meeting
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** April 30th
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** (May 6th, VC)
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** May 14th
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** May 21st - clash with MAP workshop
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** May 28th
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** June 4th
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** June 11th
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** (CM 42: June 22-24) - we may want to have an analysis workshop around the CM
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h1. Notes
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h3. Present
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Rob Ryne
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Holge Witte
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Jaroslaw Pasternak
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John Nugent
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Joe
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Adam Dobbs
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h3. Field Off Trigger Rate
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* Solenoid fields off triggers at TOF1 44000 TOF2 1000 
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* Solenoid fields on triggers at TOF1 53000 TOF2 43000
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** => 3 % rate scaling; but run with TOF2 trigger; so limit comes from ISIS/target
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* 120 triggers per spill with the Decay Solenoid at TOF1, not including tracker deadtime
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* Jaroslaw notes attempt to optimise was not successful
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h3. Physics shifter
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* Seek to get the physics devil automated
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h3. Beamline
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* Validated calibration
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* Checked some old settings
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* Made two additional settings to match to diffuser
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* Made two additional settings to optimise for "straight tracks"
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* Seeking to validate MC
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h3. EMR Papers
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* Review next week (Tuesday)
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h3. Pion contamination
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* See slides
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* Feldman-Cousins?
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** 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; 
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** Paul Soler suggests alternatively use Bayesian method (e.g. Higgs papers)
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h3. MDIC
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* Final coil positions by MAP meeting
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* Use IPAC paper as starting point for PR-ST AB paper
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h3. Error Fields
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* Slide 4: cusps come from the mesh
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* Slide 4: symmetry point is at -2.75; tracker is at around -4.75 to -5.75
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* Few * 10^-4 T in the tracker azimuthal
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* Slide 9: units are T at 0.15 m
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Solenoid fields in 2 weeks time
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h3. Non-linear beam optics
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* Looking at the 6x6 problem...