HPTPC analysis and software meeting

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Attendees: Brailsford, Nonnenmacher, Atkin, Korzenev, Parker, Chen-Wishart, Richie-Yates, Valder, Wascko, Jones, Monroe, Kaboth, Dunne, Hamacher-Baumann

 

Working group reports

 

CCD

  • Index bug.
  • Dimensionality of histogram bug found.
  • All pixels are discretised in units of 0.25 ADU.  Raw images should be integers.  To be double checked.
  • Spark killer being updated so that a spark in one image kills all 4 images

 

Waveform

  • No RAPtorr development
  • Being used for analysis now

 

Global

  • No updates this week

 

Other

  •  Talk by Ed
    • Beam database development - extracts information from current DBs
    • Information from elog used to find runs with specific parameters: No. Moderator blocks, collimator change, electron target change etc.
    • Magnet current vs time presented, shows periods of long term change and some significant outliers.
      • Followup questions with CERN beam group regarding measured 0 current points
    • Database farm access - an ongoing battle.  An email to sys-admin is needed
      • If multiple access is a problem, may be necessary to implement a ’smart’ job submitter
      • Need to check where DMTPC database is located and check their methodology
    • Time distribution of TPC waveforms shown for all anodes
      • #TODO
        • Apply threshold to remove KeV electron bursts
        • Suggestion to plot pulse height vs time

 

 

CCD Labelling

  • CCD index stored in dmtpc/raptorr does not correspond to the indices used in various codes in dmtpc; the element on the CCD vector is used instead.
  • Change implementation so that the camera config struct’s ccd_index variable tracks the vector element index.

 

ToF analysis

  • Talk by Seb
    • Various figures of merit for the paper put forward

    • Off-axis angle currently measured from S1.

      • Currently using beam database information work to calculate beam steering/beam axis.
    • Particle incidence rate for various ToF coincidences shown
      • Necessary to correct for the geometric acceptance of the ToFs (and dead time in the case of S3) when making comparisons

 

HPTPC instrumentation paper

  • No updates for this week
  • Internal deadline for mid-end February

 

Beam flux paper

  • Focussed on flux analysis, writing to follow.

 

RAPtorr workshop discussion

  • Investigate reconstruction prior to next workshop
    • Team CCD should push forward on implementing a first draft of clustering in the next week
  • We will need a simulation to develop the reco + selection
  • Further discussion of plans and goals at next meeting

 

AOB

  •  Alexander will send his VCI2019 talk around later today.  Please read.
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