Electron Spin Precession at CEBAF. Douglas W. Higinbotham Jefferson Lab and Marie-Isabelle Holdrinet Université Blaise Pascal. Polarized Source. C. Hernandez-Garcia, P. G. O\'Shea and M . L. Stutzman , Physics Today 61N2 (2008) 44. Strained GaAs Photocathode
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Douglas W. Higinbotham
Université Blaise Pascal
C. Hernandez-Garcia, P. G. O\'Shea and M. L. Stutzman, Physics Today 61N2 (2008) 44.
Presently a 6 GeV machine, scheduled to be upgraded to a 12 GeV accelerator.
Beautiful demonstration of the electron’s anomalous magnetic moment and QED.
Select a beam energy and Wien angle based on physics requirements of the Halls
(63.5 MeV Injector Energy and 565 MeV Per Linac Per Pass)
Needed to give Hall A & C high polarization without changing the beam energy for Hall B.
(63.5 MeV Injector Energy and 555 MeV & 575 MeV Per Linacs)
A two year long parity experiment requires first pass and no transverse polarization.
With the 12 GeV upgrade, these energies become available.