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Sep 24 – 29, 2023
US/Eastern timezone

A positron beam at CEBAF

Sep 26, 2023, 4:30 PM
30m
Junior Ballroom C (Durham Convention Center)

Junior Ballroom C

Durham Convention Center

Speaker

Joe Grames (JLab)

Description

Positron beams are considered as a new capability for the CEBAF 12 GeV accelerator at Jefferson Lab. This capability would provide 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 >50 nA, and greater intensities when high spin polarization is not required.

Primary author

Co-authors

Alicia Hofler (Jefferson Lab) Amy Sy (Jefferson Lab) Andrei Seryi (JLAB) Andriy Ushakov (JLab) Carlos Hernandez-Garcia (Thomas Jefferson National Accelerator Facility) Dr Cristhian Valerio-Lizarraga Dennis Turner (Jefferson Lab) Eduard Pozdeyev (Jefferson Lab) Dr Eric Voutier (CNRS/IN2P3/IJCLab - UPS) Fanglei Lin (Jefferson Lab) Jay Benesch (JLab) Joseph Gubeli (JLAB) Larry cardman (Jefferson Lab) Matt Poelker (Jefferson Lab) Max Bruker (Jefferson Lab) Michael Spata (Jefferson Lab - Accelerator Division) Probir Ghoshal (JLab) Reza Kazimi (Jefferson Lab) Robert Rimmer (JLab) Sami Habet (Paris Saclay University (IJCLab) / Jefferson Lab) Sandesh Gopinath (Jefferson Lab) Sergei Nagaitsev (JLAB / ODU) Silviu Covrig Dusa (Jefferson Lab) Victor Manuel Lizarraga-Rubio (Universidad de Guanajuato) yves roblin (jefferson lab)

Presentation materials