2018 Mott Paper Working Area

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Revision as of 13:56, 4 November 2018 by Moser (Talk | contribs) (Request #1 -- First Draft Below)

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General Links/Documents

  • Run 1
Online Analysis Spreadsheet : media:run1database.ods
Asymmetry vs Foil Thickness Full Analysis Spreadsheet : media:06.01.17_Run1_ARC+Dilution.ods
  • Run 2
Online Analysis Spreadsheet : Media:Run2RawData.ods
Asymmetry vs Foil Thickness Full Analysis Spreadsheet : media:06.01.17_Run2_ARC+Dilution.ods

Draft Punchlist

Request #1 -- First Draft Below

We measured dependence of electronic dead time on the beam current at five different average beam currents from 0.245-4.1 uA on a 1um foil. He'd like a plot showing the five data points vs. beam current with their individual uncertainties, and then the average with it's uncertainty band.

ROOT deadtime asym v beamcurrent.gif
media:Deadtime vs beamcurrent.ods
Avg deadtime v beamcurrent.gif

Request #2

We measured dependence of the physics asymmetry on the position of the beam on the target foil from two target foils: 0.225um and 1um. For each foil we measured 7 asymmetries (one at center and six others away from center). The details are described in the systematics TN on the wiki. He'd like a plot showing the measured physics asymmetries (weighted average of IN/OUT) vs. radial distance from the center (instead of using x/y values shown in the TN), and then the average with it's uncertainty band, for the two target foils.

  • Asymmetry vs Beam Position from Nominal (radially)

Request #3

Recreate Michael's Paper's Plot: Remaking of Figure 6: media:Au_targetMSteigerwald.gif. The lines are a fit ( asym = a / (1.0 + alpha . d) ). On the original figure, the lines were his calculations.

Request #4

We need an imagine of a typical FESEM picture showing a gold foil on a silicon substrate, or maybe 2 or 4 of them arranged to show typical measured you used in the analysis.

Request #5

For two foils, two samples were prepared – one near the foil center and one near the edge, and each were measured. Where are those results (or FESEM images) ?

Request #6

The detectors are centered at theta=172.6. We should check if S is maximum there or not. => The answer is that the maximum for KE=5MeV Au is 173.1 per Xavier and 129.9 per Ketevi. I think we erred perhaps so that the solid angle intercepted S at the same value left/right, or something like that.