Abstract
A high-brightness hydrogen/deuterium atomic beam source is presented. The apparatus, previously used in electron scattering experiments with tenser-polarized deuterium (Ferro-Luzzi et al., Phys. Rev. Lett. 77 (1996) 2630; van den Brand et al., Phys. Rev. Lett. 78 (1997) 1235; Zhou et al., Phys. Rev. Lett. 82 (1998) 687; Bouwhuis et al., Phys. Rev. Lett. 82 (1999) 3755), was configured as a source for internal target experiments to measure single- and double-polarization observables, with either polarized hydrogen or vector/tensor polarized deuterium. The atomic beam intensity was enhanced by a factor of similar to 2.5 by optimizing the Stern-Gerlach focusing system using high tip-field ( similar to 1.5 T) rare-earth permanent magnets, and by increasing the pumping speed in the beam-formation chamber. Fluxes of (5.9 +/- 0.2) x 10(16) H-1/s were measured in a empty set 12 mm x 122 mm compression tube with its entrance at a distance of 27 cm from the last focusing element. The total output flux amounted to (7.6 +/- 0.2) x 10(16) H-1/s. (C) 2000 Elsevier Science B.V. All rights reserved.
Original language | English |
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Pages (from-to) | 769-781 |
Number of pages | 13 |
Journal | Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment |
Volume | 455 |
Issue number | 3 |
DOIs | |
Publication status | Published - 11 Dec 2000 |
Externally published | Yes |
Keywords
- atomic beam source
- internal target
- high frequency transitions
- polarization
- hydrogen
- deuterium
- ELECTRON STORAGE-RING
- SEXTUPOLE MAGNETS
- LOW-TEMPERATURE
- SCATTERING
- HYDROGEN
- DEUTERIUM
- DESIGN