Materials¶

Can we try for another material physics "weekly" Friday 23rd at 15:00.
Let's try for the phone conference line defined in

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

Agenda like:

• Energy loss - Rhys Gardener, Dimitrije Maletic
• Multiple Scattering (field off) - John Nugent #1789
• Multiple Scattering (field on) - Celeste Pidcott
• References list

Cheers,
Chris

Notes¶

Chris Rogers
Rhys Gardener
John Nugent

Rhys Gardener¶

• Sorting out onmon
• Going through mountain of reference leads
• Will continue to update the document list
• Measurements where they measured the gap between bubbles in the bubble chamber

John Nugent¶

• Misalignment analysis is not complete - suspect asymmetry from misalignment analysis (or maybe tracker misreconstruction)
• Should be running the MC with not misaligned detectors in the first instance
• Systematics
  • Not sensitive to PID?
• Looking at fiducial volume of the absorber
  • Looks like radial cut does not muck the statistics
  • No consideration of thickness dependence on radius
• Looking at momentum dependence
  • > 10 % change in Gaussian RMS

• Note the error analysis in MuScat
  • Say 1.9 radiation lengths upper edge bin 0.008 +/- 0.003 rad^{-1}
  • Gives p(particle) = 0.008*(0.1151-0.0938) = 0.0001704
  • Purely statistical basis need 50,000 muons in the sample
  • Where does the factor 20 come from?
• What is the change in number of particles per bin per momentum (consider using PDG formula rather than full MC)
• What is the change in number of particles per bin per absorber thickness (consider using PDG formula rather than full MC)
  • Note that absorber thickness is a function of radius (and track angle)
• Redo plots showing probability per radian using MuScat binning
• Redo plots showing number of events using muscat binning
• Do data rate analysis with pion beam
• Slides followed up by a note

DONM: 15:00 on Wednesday