# 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