Spin-exchange optically pumped polarized {sup 3}He target for low-energy charged particle scattering experiments

Journal Article · Tue Mar 01 04:00:00 EST 2005 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1866235· OSTI ID:20644123

Katabuchi, T; Buscemi, S; Cesaratto, J M; Clegg, T B; Daniels, T V; Fassler, M; Neufeld, R B; Kadlecek, S ^[1]

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1. Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599-3255 (United States)

We have constructed, tested, and calibrated a polarized {sup 3}He target system which facilitates p-{sup 3}He elastic scattering at proton energies as low as 2 MeV. This system consists of a target cell placed in a uniform B field inside a scattering chamber and an external optical pumping station utilizing Rb spin exchange. Computer-controlled valves allow polarized {sup 3}He gas to be transferred quickly between the optical pumping station and the spherical Pyrex target cell, which has Kapton film covering apertures for the passing beam and the scattering particles. The magnetic field required to maintain {sup 3}He polarization in the target cell is created with a compact, shielded sine-theta coil. Target gas polarimetry is accomplished using nuclear magnetic resonance and calibrated using the known analyzing power of {alpha}-{sup 3}He scattering.

• OSTI ID: 20644123
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 3 Vol. 76; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
APERTURES
CHARGED PARTICLES
ELASTIC SCATTERING
HELIUM 3 TARGET
MAGNETIC FIELDS
MASS NUMBER
MEV RANGE 01-10
NUCLEAR MAGNETIC RESONANCE
NUCLEAR REACTIONS
OPTICAL PUMPING
POLARIMETRY
POLARIZATION-ASYMMETRY RATIO
POLARIZED TARGETS
PROTON-NUCLEON INTERACTIONS
PYREX
SPHERICAL CONFIGURATION
SPIN EXCHANGE
SPIN-LATTICE RELAXATION
VALVES