Pion Meeting June 4 2021 11AM ET

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• Bluejeans link: 420 107 252
• Dial-in: 408-740-7256 (US), 888-240-2560 (US Toll Free), 408-317-9253 (Alternate number)

Agenda

1. Updates on pion detector studies (Elham)
2. Beam generator simulations (Raj)

Attendance

David, Elham, Julia, Raj, Wouter

Minutes

• Pion detector studies (Elham)
  • Entire pion donut holding frame changed to vacuum
    • improves pi/e ratio by factor 2
    • still have charged particles reach lucite
    • frame is significant source of background
  • Shorter lucite detector and shifted inwards:
    • improves pi/e ratio marginally but not dramatically
  • TODO
    • Set the lucite lightguide to vacuum: check whether lightguide or PMT is a big part of the source of background in our lucite
    • Look at hit.phi - hit.vphi (= atan2(hit.vx,hit.vy)): does background come from same or different sector?
    • Draw separate sources independently and zoomed in: one plot each for showermax, concrete/lead, lightguide, lucite close-up with shielding, with number of entries shown on each plot
    • Draw direction histogram for lucite hits at top surface: 1d histo of momentum theta, 2d histo of momentum theta and phi, 1d histo of dot product with axis towards PMT