h1. 2016-11-22-straight-tracks-paper

h2. Details

Tuesday 22nd November at 15:00 and continued on Wednesday 23rd November at 14:00.

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

Note:

http://mice.iit.edu/micenotes/public/pdf/MICE0497/MICE0497.pdf

h2. Notes

Present:

John Cobb

Paul Soler

Mariyan Bogomilov

Chris Rogers

Alan Young

Ryan Bayes

h3. Page 1

First three comments may be more appropriate for the paper rather than the MICE note

* Should defend choice of Xenon

* Should define symbols in emittance formula

* Should define equilibrium emittance

# "Thus, despite the limited angular range it is extremely attractive as a direct measure of the

scattering of muons" Need to add some more quantitative discussion of angular acceptance.

h3. Page 2

# Table 1: Row for Al numbers are suspect - correct

# Table 1: General comment that some description of the material budget is required; how much material and where?

# Table 1: In similar vein, some description of absorber is necessary

# Scattering angle definitions eqn (3) and (4) are not correct - see supplementary note from JHC attachment:Projected-angles.pdf

# Correction @theta = \sqrt(<theta_scatt>)@ should be @theta = \sqrt(<theta^2>)@

# There was some discussion over the use of a Gaussian fit, as mentioned in final sentence of 1.1. Comment that the description would be better in the "analysis" section where the relevant measurements and plots are listed.

# 0.0038 should be 0.038

# Comment that section 1.2 needs a lot of work; it was not reviewed in detail.

h3. Page 3

# "deviation between data and simulation": some discussion over this comment. Which direction is "South"? Why does beam offset introduce bias?

** Beam offset causes clipping, which is a bias

** the 4 cm shift is in MC

** It is a bias in the simulated measurement, not in the data itself

h3. Page 4 (Fig. 1)

# Be explicit that this is MC through a "bare absorber"

# Why is the Geant4 MC of Xenon so weird - e.g. asymmetric?

** Ryan is not sure and will (continue to) dig

# Why is the Cobb-Carlisle MC of Xenon so weird (e.g. thick)?

** JHC will dig

h3. Page 5

No comment

h3. Page 6

# Some discussion of the cuts and rate accounting

** Timing selection is a very small time bin, e.g. 200 ps over the few ns width of the muon peak

** Fiducial selection is a 300 mm diameter tracker over a 5 m drift length

** Need to add some description of the basic geometry