[PEPPo] Fw: Invitation for a talk at SPIN2023

[Joe Grames]

Dear Ce+BAF colleagues,

The abstract to SPIN2023 is copied below; it's fairly straight-forward so please send me comments by end of today, thanks.  -Joe


Positron beams are considered as a new capability for the CEBAF 12 GeV accelerator at Jefferson Lab.  This capability would provide users with a unique facility for hadronic physics experiments and tests of the Standard Model.  Secondary e+/e- particle beams are created using the polarized bremsstrahlung of an intense continuous-wave (CW) spin polarized primary electron beam. To do this, the existing Low Energy Research Facility is re-imagined with a new 300 kV dc HV GaAs photogun which provides an intense ~1 mA and highly polarized ~90% electron beam. This beam is accelerated to ~100 kW and directed to a rotating W-target, where secondary e+ (or e-) are collected to a CW beam, accelerated to 123 MeV and injected to CEBAF for energies up to 12 GeV.  This new Ce+BAF configuration is optimized to provide experiments with positron spin polarization >60% and intensity greater than >100 nA, and greater intensities when high spin polarization is not required.


________________________________
From: Patrizia Rossi <rossi at jlab.org>
Sent: Tuesday, April 25, 2023 10:10 AM
To: Joe Grames <grames at jlab.org>
Cc: Patrizia Rossi <rossi at jlab.org>; Ernst Sichtermann <epsichtermann at lbl.gov>; Anselm Vossen, Ph.D. <anselm.vossen at duke.edu>; Matthew Poelker <poelker at jlab.org>
Subject: Invitation for a talk at SPIN2023


Dear Joe,



On behalf of the organizing committee of the SPIN 2023 conference, we invite you to give a talk on 'A positron beam at CEBAF” in the  session "Future Facilities and Experiments" .



Please submit a short abstract by  May 31, 2023. Conference details including the link for abstract submission can be found at: https://indico.jlab.org/event/663/



A hardcopy invitation on SPIN 2023 letterhead can be obtained by contacting co-chairs Thomas Mehen and Anselm Vossen at: spin2023_contact at duke.edu<mailto:spin2023_contact at duke.edu>.



We hope very much that you can accept our invitation and we look forward to seeing you at the conference,



Sincerely,

Patrizia





-------------------------------------------

# Patrizia Rossi
# Jefferson Lab
# 12000 Jefferson Avenue
# Suite 5
# Newport News VA 23606 (USA)
# e-mail: rossi at jlab.org<mailto:rossi at jlab.org>
# phone: +1 (757) 269 7740
# fax: + 1 (757) 269 5800


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