Tests of a high density polarized sup 3 He target for electron scattering

Journal Article · Sun Mar 01 04:00:00 EST 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.45.915· OSTI ID:7235483

Chupp, T E; Loveman, R A ^[1]; Thompson, A K; Bernstein, A M; Tieger, D R ^[2]

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1. Harvard University Physics Laboratories, Cambridge, Massachusetts 02138 (United States)
2. Physics Department, Laboratory for Nuclear Science, and Bates Linear Accelerator Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

We have developed a polarized {sup 3}He target for polarized electron scattering measurements. The target has a {sup 3}He density of 1.1{times}10{sup 20} nuclei cm{sup {minus}3}, a total length of 7.5 cm and thin glass windows of 120--180 {mu}m thickness. {sup 3}He polarization as large as 40% was produced, limited only by the available laser power. The {sup 3}He polarization was maintained during bombardment with up to 22 {mu}A of 578 MeV electrons. A measurement of elastic scattering of polarized electrons from polarized {sup 3}He confirmed that the nuclei in the electron beam had the expected polarization. The polarization is produced by spin exchange with laser optically pumped Rb vapor, and the target design incorporates two separated volumes, one for optical pumping and the other for the electron bombardment. Extensions of this design are practical for fixed target electron scattering from polarized {sup 3}He planned for SLAC and CEBAF.

• DOE Contract Number: AC02-76ER03069
• OSTI ID: 7235483
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 45:3; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

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661220* -- Particle Beam Production & Handling
663420 -- Lepton-Induced Reactions & Scattering-- (1992-)
663510 -- Nuclear Mass Ranges-- A=1-5-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATOR FACILITIES
ACCELERATORS
BEAMS
CEBAF ACCELERATOR
CHARGED-PARTICLE REACTIONS
DATA
DESIGN
ELASTIC SCATTERING
ELECTRON REACTIONS
ENERGY RANGE
EXPERIMENTAL DATA
HELIUM 3 TARGET
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LEPTON REACTIONS
LINEAR ACCELERATORS
MEV RANGE
MEV RANGE 100-1000
NATIONAL ORGANIZATIONS
NUCLEAR REACTIONS
NUMERICAL DATA
PERFORMANCE TESTING
POLARIZED BEAMS
POLARIZED TARGETS
SCATTERING
STANFORD LINEAR ACCELERATOR CENTER
TARGET CHAMBERS
TARGETS
TESTING
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US DOE
US ERDA
US ORGANIZATIONS