The Compton polarimeter at the SLC

Author

Shapiro, G. ; Bethke, S. ; Chamberlain, O. ; Fuzesy, R. ; Kowitt, M. ; Pripstein, D. ; Schumm, B. ; Steiner, H. ; Zolotorev, M. ; Rowson, P. ; Blockus, D. ; Ogren, H. ; Settles, M. ; Fero, M. ; Lath, A. ; Calloway, D. ; Elia, R. ; Hughes, E. ; Junk, T. ;

Author_Institution

Lawrence Berkeley Lab., CA, USA

fYear

1993

fDate

17-20 May 1993

Firstpage

2172

Abstract

Compton scattering provides a fast and accurate measurement of the longitudinal polarization of electron beams available at linear colliders. At the SLC, green (532 nm) circularly polarized light from an Nd:YAG laser, frequency doubled, collides nearly head-on with electrons after they have passed the e⁺e^- interaction point but before they have encountered any dipole bending magnets. Unique to this application, the recoil electrons, rather than scattered photons, are detected, after being momentum analyzed by the bending magnets nearest to the interaction point. Thus we achieve spatial separation of several centimeters between electrons from scattering at different Compton angles

Keywords

beam handling equipment; electron accelerators; linear accelerators; particle beam diagnostics; polarimeters; Compton angles; Compton polarimeter; Nd:YAG laser; SLC; bending magnets; circularly polarized light; dipole bending magnets; e⁺e^- interaction point; electron beams; frequency doubled light; linear colliders; longitudinal polarization; momentum analysis; scattered photons; spatial separation; Electron beams; Free electron lasers; Laser beams; Light scattering; Magnetic analysis; Magnets; Optical polarization; Optical scattering; Particle scattering; USA Councils;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1993., Proceedings of the 1993

Conference_Location

Washington, DC

Print_ISBN

0-7803-1203-1

Type

conf

DOI

10.1109/PAC.1993.309258

Filename

309258