High density polarized hydrogen gas target for storage rings

Journal Article · Sun Jan 01 04:00:00 EST 1995 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1146388· OSTI ID:164987

Zapfe, K; Braun, B; Gaul, H; Grieser, M; Povh, B; Rall, M; Steffens, E; Stock, F; Tonhaeuser, J ^[1]; Montag, C; Rathmann, F; Fick, D ^[2]; Haeberli, W ^[3]

---

1. Max-Planck-Institut fuer Kernphysik, 69029 Heidelberg (Germany)
2. Philipps-Universitaet, Fachbereich Physik, 35032 Marburg (Germany)
3. Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)

A target of gaseous polarized hydrogen was formed by injecting polarized hydrogen atoms (produced by Stern--Gerlach spin separation) into a storage cell consisting of a cylindrical tube open at both ends. The target was placed in a storage ring to study the target characteristics (nuclear polarization, target thickness, radiation resistance). A weak transverse guide field (5 G) was applied to define the polarization direction. When atoms in a single hyperfine state were selected, the nuclear polarization of the target was measured to be 0.80{plus_minus}0.02. The areal density of the target under these conditions was (5.5{plus_minus}0.2){times}10{sup 13} {bold H}/cm{sup 2}, while for two spin states (applicable to experiments in high energy rings where a strong magnetic field can be applied to the target) the target thickness was found to be (8.2{plus_minus}0.3){times}10{sup 13} {bold H}/cm{sup 2}. The target polarization was unaffected by prolonged exposure of the target to beams up to 1 mA. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• OSTI ID: 164987
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 66; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
DENSITY
HYDROGEN
NUCLEAR REACTIONS
POLARIZED TARGETS
STORAGE RINGS
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K