20191028-Analyzer-Mtg

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Logistic information

Meeting room at JLab: CC F226

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This meeting immediately follows the PREX2 Analysis meeting, which is dedicated to tasks directly related to the PREX-II analysis.

Agenda

Analyzer code updates

1. Paul's work on analyzer updates had stalled last week

Prompt analysis toolchain

1. WAC checking of parameter files, etc.
   • Devaki was going to carry Catherine's analysis (https://logbooks.jlab.org/entry/3726581) summarizing the normalization BCM changes after slug 68. She sent it to Tao, and he's posted it in the HAPlog
   • She will also be looking at the double-differences to piece out when various BCMs went bad, and figure out which double-differences we can trust
   • For the double-differences, we look at the RMS, but we also care about the central value
   • The question of "can we trust BCMs when they are noisy" is a separate question that Cameron is working on. For this analysis, we should exclude double -differences when they are noisy
2. Status on the farm
   • Robert is getting the output directories ready.
     • How much space are we using in the web directory? Can we keep the PREX prompt, PREX respin, and CREX plots all at once? Robert will look into that
   • I had forgotten to look into requesting more volatile space last week; should follow up this week

1. Path to migration to japan
   • We won't wait on the migration to start the PREX-2 respin
   • For CREX, we want JAPAN to do correlation/correction done on mini-run basis, BMW extractor

1. Dithering analysis status & updates?
   • Victoria is working on getting the "blessed" set of dithering slopes for all production runs
   • Kent brings up doing a "residual correlation" analysis of the modulation asymmetry data, especially with the coil that was not used in getting the slopes
2. Lagrange analysis
   • Maybe merge this with dithering analysis in some way? At least for the sensitivity/slope evaluation. Cameron will take a look at connecting it into the dithering toolchain as an additional step.
3. Other issues
   • Tao asks if the combiner trees can have a summary tree too. I think that should be possible. It may need some of the changes in the data-exchange branch I'm working on, Tao has posted a Github issue (#248)

Other issues

1. • Let's aim at getting everything ready for a respin by October 23 soon.
     • We should have some understanding about the pedestal changes before we start
     • We also need to have the "blessed" set of dithering slopes for all production runs
     • We will use the same set of normalizing BCM as we used during the run
   • Are we doing things to fix the analog BCM?
     • Cameron has a function generator from J. Musson, to first check linearity at up to 150uA equivalent, but could also use it to check for the appearance on the noise in the BCMs
   • The PREX-2 raw data has been moved to adaq2 disk; Paul should make a set-up script to analyze those runs on adaq

Present

Tao, Dmitri, Weibin, Devi, Ryan, Jinlong

Phone: Paul K., Cameron, Caryn, Ciprian, Devaki, Kent, Robert R., Sakib, Sangwha, Ye Tian, Siyu