PPB - April 12, 2023

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Meeting Coordinates

Agenda

  • IPAC'23 - Joe, Amy, Reza, Eric - Which day is your poster? Plan to circulate poster and proceedings?
  • Max - Status of PEPPo-II LDRD proposal
    • Andriy's simulations
      • max e+ yield 6e-4 at 1 mm thickness
      • emittance cuts do not change this very much despite increase in beam size
      • deposited power favors thinner targets (but thermal conductivity may not?)
    • Chicane layout and integration into existing space: mostly determined by space constraints
      • 20230412 092102.jpg
      • after 0L02, make use of existing DP can, fast valve, at least 2 quads
      • could start at 5D line, gives us BCM and third quad for free, but perhaps not enough space
      • to use existing viewer, harp, quads, and FC2: reinject before ITV0L03?
    • whole chicane should work with 7 MeV electrons, but east leg must be achromatic on its own
    • RF positron capture does not seem viable (cost, power, time, space, everything)
    • Rough grocery list
      • west leg: 2 DL dipoles (scavenged), 1 valve, 4 correctors, 1+ BPM, 3 QD quads (2 can be easily scavenged). This is assuming achromatic design like UITF, but length is a problem (~ 2.5 m). Can choose to ignore dispersion... There are various design choices but no risks.
      • 20230412 092115.jpg
      • target line: 2 quads, 2 BPMs, 2+ correctors, 1 DP can, 1 valve, target, 2 solenoids, 2 apertures. No risks up to target, then dependent on capture simulation
      • east leg: needs lots of simulation to determine what we need; at least 2 special dipoles (maybe CFM), 1 aperture, 1 lens, 1 valve
      • 20230412 092124.jpg
      • 20+ magnet channels necessitates extra trim rack in ISB?
      • vacuum pumps TBD but likely not negligible
  • Status from target working group
  • Bob - status of SRF toy model
  • Any other business...

Upcoming

  • April 19 - Joint meeting with PWG
  • May 7-13 - IPAC'23 (Joe, Amy, Reza, Eric)
  • May 15-19 - LCWS (Andriy, Carlos)