h1. 2019-03-18 amp-evolv

17:00 GMT Monday 18th March

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

h2. Actions

intro (KL)

-0th paragraph add section headings

-1st paragraph needs revision; check historical details

-3rd paragraph need caveat on e+e-

4th paragraph need frictional cooling

observables (CR)

-introduce cooling formula; but phrased ito amplitude (FD)- -_CR to integrate with paper (CR)_-

-remove sentence regarding 9% centile just before eq 1-

-Add a sentence regarding "human readable" what is kNN algorithm- -_FD to check CR's understanding (FD)_-

-Joining sentence between "observables" and "MICE"-

MICE

(CR) -contact Jason Tarrant and photo repro regarding image- _for now keep working on it amongst ourselves_

(FD) -upload schematic latex to overleaf-

(FD) -Add labels to schematic; make lH2 not LiH absorber; general "look and feel" stuff-

(CR) -remove phase space figure to MICE note; consider 2d amplitude plot instead a la Francois thesis figure 6.25-

Results

*DONE* (CR) francois asked by email - why is mc_reco sample size not same as reco sample size (they are supposed to be same sample _it is impurity at high radius (tracks in MC fiducial but not data fiducial); is impurity properly handled by correction mechanism? Need to check; relies on migration matrix non-unitary_

(CR) -investigate the 17.5 mm bin issue esp at 10-140- _could check rebinning but low priority for now_

(CR) -investigate the scraping aperture _looks like it is MC offset_-; add a vertical line corresponding to the scraping aperture; comment in text

(FD) -fractional emittance is better than most significant bin as a table-

(FD) -need to do the efficiency correction on fractional emittance-

(FD) -need to do the efficiency correction on density-

(CR) -Check apertures in lH2 vs None absorber; KL claims window aperture should be mostly not there in "None"-

(CR/FD) -Check systematic for density plot in TKU 10 mm; why is SSU CC giving such large uncertainty?-

h2. Notes from CM53

Try Nature before Nature physics

Fig. 1 - schematic

(CR) -Preferably plot B_{z}, or introduce an arbitrary factor of -1 after the absorber, or label as |B|-

(CR) -Note that the sigma(x) plot comes from linear beam optics calculation-

Fig. 2 - phase space 2d plots

(CR) Interesting that there is a cliff in the x-py and y-px plots. Is this diffuser aperture (or some other aperture)

*DONE* (CR) If show Phase space plots, put one beam ellipse on _won't show ellipse_

Fig. 3 - amplitude pdf

*DONE* (CR) Add the amplitude pdf plot without corrections to the supplementary information

(CR) -Plot amplitude pdf as a histogram or without horizontal errors-

(CR) Afterwards, JHC pointed out that log(n) vs sqrt(A) is linear for Gaussian beam. It might just confuse people to plot it.

*DONE* (CR) Vertical axis label is wrong. Normalisation needs to be explained.

Fig. 4 - pdf ratio

(CR) -Make MC less visible in pdf ratio plot - it tends to dominate-

(CR) Increase the MC stats (implies going to production MC, it is time)

Fig. 5 - cdf ratio

(CR) -The number of significant figures in the table is too great. Need to understand the difference between the errors for different data-

(CR) -John and KL asked for raw pdf numbers-

(CR) -Discussion of which bin to choose and how to quantify the level at which we observe cooling-

* Soler suggested CLS method

* -Others suggested looking at significance of first bin rather than most significant bin-

(CR) -Move the points to the bin edge, not bin centre; look and feel issues-

*DONE* (CR) Check systematic error correlations are handled correctly

(CR) -General - check the systematic error is reasonable; e.g. do we need to include big error for SSU and for SSD; check we only use -ve error in SSU-

(CR) General - move to production

h2. Other jobs

(CR) -Check - why is the systematic error so much higher on density plot than e.g. amplitude pdf plot?-

(CR) -Add labels to schematic-

*DONE* (CR) Fix or explain kink in 10-140 plot amplitdue pdf

*DONE but needs second pass* (CR) Write methods section

(CR) Update MICE Note

(FD) -Add comment noting the beam used for the Poincare plot-

(FD) -Add date to the schematic-

(ALL) Stats test for table

*DONE* (CR) Data to francois for poincare section

(FD) Poincare section plots

(CR) Fix bibliography; should reference as much as possible up to 50 refs!