Jefferson Lab > CIO > IR
Privacy and Security Notice


Publication Information

Title Two Wien Filter Spin Flipper
Authors Joseph Grames,Philip Adderley,Jay Benesch,James Clark,John Hansknecht,Reza Kazimi,Danny Machie,Bernard Poelker,Marcy Stutzman,Riad Suleiman,Yuhong Zhang
JLAB number JLAB-ACC-11-1377
LANL number (None)
Other number DOE/OR/23177-1608
Document Type(s) (Meeting) 
Supported by U.S. Naval Research: No
Supported by Jefferson Lab LDRD Funding: No

Poster compiled for PAC 2011

Proceedings of PAC 2011
Edited By
Jacow (2011)
Page(s) 862-864
Publication Abstract: A new 4pi spin ma­nip­u­la­tor com­posed of two Wien fil­ters ori­ent­ed or­thog­o­nal­ly and sep­a­rat­ed by two solenoids has been in­stalled at the CEBAF/Jef­fer­son Lab pho­toin­jec­tor. The new spin ma­nip­u­la­tor is used to pre­cise­ly set the elec­tron spin di­rec­tion at an ex­per­i­ment in any di­rec­tion (in or out of plane of the ac­cel­er­a­tor) and pro­vides the means to re­verse, or flip, the he­lic­i­ty of the elec­tron beam on a daily basis. This re­ver­sal is being em­ployed to sup­press sys­tem­at­ic false asym­me­tries that can jeop­ar­dize chal­leng­ing par­i­ty vi­o­la­tion ex­per­i­ments that strive to mea­sure in­creas­ing­ly small physics asym­me­tries [*,**,***]. The spin ma­nip­u­la­tor is part of the ul­tra-high vac­u­um po­lar­ized elec­tron source beam line and has been suc­cess­ful­ly op­er­at­ed with 100keV and 130keV elec­tron beam at high cur­rent (>100 mi­croAmps). A unique fea­ture of the de­vice is that spin-flip­ping re­quires only the po­lar­i­ty of one solenoid mag­net be changed. Per­for­mance char­ac­ter­is­tics of the Two Wien Fil­ter Spin Flip­per will be sum­ma­rized.
Experiment Numbers: other
Group: Ctr for Injectors&Sources
Document: pdf
Accepted Manuscript:
Supporting Documents:
Supporting Datasets: