BCAL Reconstruction Meeting 2014-09-18

From GlueXWiki
Revision as of 11:55, 22 September 2014 by Zisis (Talk | contribs) (Minutes)

Jump to: navigation, search

Video Conferencing Information

Meeting Time: 12:00 p.m. EDT

  1. To join via a Web Browser, go to the page [1] https://bluejeans.com/907185247.
  2. To join via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 907185247.
  3. To join via phone, use one of the following numbers and the Conference ID: 907185247.
    • US or Canada: +1 408 740 7256 or
    • US or Canada: +1 888 240 2560
  4. Upon connection all microphones are automatically muted. To unmute your mike on a Polycom or equivalent unit, enter *4. Unmuting on a computer is trivial as there is a microphone button than can be clicked.
  5. More information on connecting to bluejeans is available.

Participant Direct Lines

  • JLab Phone: in CC F326 is 757-269-6460 (usual room)
  • JLab Phone in CC L207 is 757-269-7084
  • Phone in the Regina Video-conference Suite is 306-585-4204

References

  1. BCAL Reconstruction Issues
  2. BCAL Reconstruction Algorithms
  3. Will's reconstructed energy info

Action Items

  1. Reconstruction code
    1. Timing: extracted from F1TDC and compared to fADC; check need for time-walk (fits, iterations, etc)
    2. Tegan: BDT presentation and timing plots at next meeting
    3. Sampling fraction tables
    4. Shower curvature tables: compare KLOE to IU codes: check gap in cluster handling between codes.
    5. z-coordinate determination from up/down amplitude ratio
    6. set variable “failures” to a number other than zero (e.g. -9999 or similar)
    7. comb code for constants to be pulled out into a database
    8. measure data pedestals using LV=0 setting (Mark)

Agenda

  1. Announcements
  2. Action Items
  3. Updates
    1. BDT Update: Presentation:File:BDT 2014-09-18.pdf (Tegan)
    2. fADC time-walk code: see emails from Aug 21 and Sep 17; (Will and Tegan)
  4. Any other business

Minutes

Attendees: David, Elton, Will M., Irina, Andrei (JLab), Will L. (CMU), Justin (MIT), Tegan, Zisis

  1. Announcements: Zisis is planning to come to JLab for shifts, Oct 1-11, subject to the accelerator schedule.
  2. Action Items: Items 1 and 2 are being worked on; see Tegan's reports below.
  3. BDT Update: Tegan gave a report on what he and Justin have been working on. The objective is to implement the BDT in the BCAL Reconstruction to see if it can improve over Will's cuts analysis; also to import the BDT knowledge to Regina.
    1. Overview: The events are generated by bggen (full hadronic photoproduction spectrum) requiring at least 2 showers/clusters in the BCAL. The FCAL is not involved at this stage but will be in the future. The BDT was trained on a single cluster (gamma). Training it on di-photon sample may occur in the future. pi0 resolution
    2. Questions:
      1. (ES) Why the theta ranges? A: Theta is binned in ranges (instead of letting the BDT handle it) because it allows the extraction of finer dependencies over limited angular range, instead of a global dependency.
      2. (WL) Is there a hard cut to eliminate noise? A: No.