Difference between revisions of "PPB - April 12, 2023"

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== Agenda ==
 
== Agenda ==
* IPAC'23 Presenters - drafts (updates, proceedings, posters)
+
* IPAC'23 - Joe, Amy, Reza, Eric - Which day is your poster?  Plan to circulate poster and proceedings?
: * Word template w/ instructions (Letter) [[media:JLAB-PREPARATION OF PAPERS FOR JACoW CONFERENCES.docx]]
+
:* Joe - Contribution #1313 submitted to IPAC’23 entitled "Status of Ce+BAF: Polarized Positron Beam Capability at CEBAF 12 GeV" (programme code: MOPL152, https://www.overleaf.com/read/vqnhmpkrddbh - circulates this Thursday
: * Joe - (Day/Code)
+
:* Reza - Presents Wed, circulates this weekend
: * Reza - (Day/Code)
+
:* Andriy - "Conceptual Design of a High-Power Target for Positron Production at CEBAF": https://www.overleaf.com/5323634316yytsftvttywt
: * Amy - (Day/Code)
+
:* Amy - ...
: * Andriy - (Day/Code)
 
  
* Status of PEPPo-II LDRD
+
* 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
 +
*** [[File:20230412_092102.jpg|500px]]
 +
*** 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.
 +
*** [[File:20230412_092115.jpg|500px]]
 +
*** 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
 +
*** [[File:20230412_092124.jpg|500px]]
 +
*** 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 ==
 
== Upcoming ==
 
* April 19 - Joint meeting with PWG
 
* April 19 - Joint meeting with PWG
* May 7-13 - IPAC'23
+
* May 7-13 - IPAC'23 (Joe, Amy, Reza, Eric)
* May 15-19 - LCWS - https://wiki.jlab.org/ciswiki/index.php/PPB_References_and_Links#2023
+
* May 15-19 - LCWS (Andriy, Carlos)

Latest revision as of 10:12, 12 April 2023

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)