Operation of polarized {sup 15}{ital NH}{sub 3} and {sup 15}{ital ND}{sub 3} targets in a high intensity electron beam: SLAC-E143 target report

Journal Article · Fri Sep 01 04:00:00 EDT 1995 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.48925· OSTI ID:254138

Averett, T ^[1]

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1. Dept. of Physics, University of Virginia (United States)

Several radiation doped targets have recently been used in a polarized target experiment (E143) at the Stanford Linear Accelerator Center using a 29 GeV electron beam (5.0{times}10{sup 11}{ital e}{sup -}/sec). The targets used were {sup 15}{ital NH}{sub 3} and {sup 15}{ital ND}{sub 3} that were pre-irradiated under liquid argon by electrons with energies of 35{endash}350 MeV. Microwaves were used to dynamically polarize the nucleons in a 5 T superconducting magnet. Temperatures of {approximately}1.0 K were achieved by means of a high cooling power {sup 4}He evaporation refrigerator. After {ital in}-{ital situ} 1.0 K irradiation by 29 GeV electrons, polarizations up to {approximately}75{percent} and {approximately}40{percent} with beam on target were achieved for protons and deuterons respectively. Detailed polarization results, radiation damage and anneaning characteristics, and general target performance will0be presented here. {copyright} {ital 1995 American Institute of Physics.}

• Sponsoring Organization: USDOE
• OSTI ID: 254138
• Report Number(s): CONF-9409103--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 343; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
66 PHYSICS
DESIGN
DEUTERIDES
GEV RANGE 10-100
NITROGEN HYDRIDES
PERFORMANCE
POLARIZATION
POLARIZED TARGETS
TEMPERATURE RANGE 0000-0013 K