CPP and NPP Readiness Review

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Preparations for the CPP and NPP Readiness Review

Planning for Experiment

Outline Presentations (February 10, 2021)

  • Reviewers:
    • Stepan Stepanyan (chair+muon detector)
    • Alexandre Cansonne (Trigger)
    • Brad Sawatzky (Tracking System -MWPC)
    • Chris Keith (Target)
    • Robin Wines (Installation)
    • Mikhail Kostin (RadCon)
    • Edy Nissen (Beamline)
    • Javier Gomez (Observer)
    • Ed Folts (Observer)

Report and Response


Response 1

Comments to Response 1

Response 2

  1. MWPC Efficiency
  2. Schedule Status

Comments to Response 2

Response 3

We have summarized the preliminary results from the cosmic-ray test in EEL126 in Production Testing of MWPCs for CPP (GlueX-doc-5373). The CPP experiment requires six MWPCs and we have six chambers that deliver excellent performance in the cosmic-ray setup in the EEL. The estimates of the efficiency are of the order of 99.7% or greater over a broad range of voltage and/or software thresholds. Two spare MWPCs (Frodo and Galadriel) exhibit low levels of electronic noise that is under investigation.

Comments to Response 3 (Approval)

  • Email from Patrizia: The main points are summarized in the next two points.
  • "...the committee is satisfied with the results of the MWPC tests and therefore they think the CPP/NPP collaboration fulfilled the requirements to pass the ERR."
  • The committee encourages us to measure the performance in Hall D: "...the noise level can be different in the hall and therefore the threshold settings that will affect the efficiency. A test of chambers in the hall before the run is advised."

Additions to Standard Equipment

The major modifications required to operate the experiment are the following

  • Design, fabrication and installation of the muon detector
    • Multi-wire proportional chambers
    • Modifications to the downstream platform, support structure and iron absorbers
  • New (mono-isotopic) solid Pb target
  • Charged-particle trigger based on the time-of-flight detectors
  • Move tagger microscope to cover 6 GeV coherent peak

Documentation for Review

  1. PAC Documents
  2. TOF Trigger
  3. Draft Documents
  4. Released Drawings
  5. Installation Schedule
  6. Wiki Pages for further reference