20191021-Analyzer-Mtg

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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. Pull requests
   • #239---Feature-Aggregator Add Regressed
     • Ready to be merged; I'll merge it later this week.
2. New feature plans
   • Continuing development of minirun functionality
   • Data-handlers which can process results from other data-handlers
     • I've made some commits, and am testing it this week. Working to resolve conflicts
   • BMW first pass extractor
     • Cameron has been in contact with Wouter to get started, will follow up this week
     • Wouter has a WIP which uses an error flag test to select the events. Need to make sure Beammod has a unique error flag

Prompt analysis toolchain

1. WAC checking of parameter files, etc.
   • Catherine has a HALog summarizing the normalization BCM changes up to slug 68: https://logbooks.jlab.org/entry/3726581
     • Tao will carry this analysis forward after slug 68
     • A similar analysis would be to look at the double-differences as a function of time, when we had multiple BCMs working
   • Robert raised a few questions about runs in his slugs
2. Status on the farm
   • I had forgotten to look into requesting more volatile space last week; should follow up this week
   • Need to set up the output directories
     • I'll follow this up with Robert over the next few days
3. Path to migration to japan
   • Needs: Correlation/correction done on mini-run basis, BMW extractor
   • Do we want to do all of the prompt plots again? Certainly for CREX; let's think about it for PREX
     • If we redo them for PREX, we probably should make a new set of directories. Do we have enough space in the web directories?
4. Dithering analysis status & updates?
5. Lagrange analysis
6. 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, but Tao will try to look into it from the develop branch

Other issues

1. • Let's aim at getting everything ready for a respin by October 23.
     • We should have soem understanding about the pedestal changes before we start
     • We also need to have the "blessed" set of dithering slopes for all production runs
     • Do we want to use the digital downstream as the normalizing BCM for the whole run?
       • Caryn says that there are periods in the early run where both digitals were plugged into the same receiver, so the double differences are less meaningful...
       • The analogs have better resolution when they are working, so if we use the "hodgepodge" choice we get a improved resoultion
       • Kent suggests that for this respin we stick with the "hodgepodge"
       • Caryn asks if we should be sure to use the same BCM for normalizing as we used for feedback: Kent says let's not worry about it for now, but we should keep track of which BCM was used in feedback and normalization
       • Devi asks if we need to re-evaluate pedestals if we change the normalizing BCM? In fact, in the early runs the pedestals were determined with BCM-DS, but we used BCM-DSx3 as the normalizing BCM. It shouldn't really matter which BCM we used for the pedestal, as long as the BCM was working consistently with the others.
   • 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
   • Bob is going to move all the PREX2 raw data to the adaq2 disk, so we should just be aware of that

Present

Tao, Devi, Don

Phone: Paul K., Cameron, Caryn, Ciprian, Jinlong, Kent, Bob M., Robert R., Sakib, Sangwha, Siyu