The University of Washington polarized ion source
A colliding-beams polarized ion source has been in operation for nuclear physics experiments at the University of Washington tandem-linac facility since late 1987. Thermal beams of polarized atomic hydrogen or deuterium are ionized by charge exchange in collisions with a collinear, fast, neutral cesium beam. Negative ions are extracted and the polarization symmetry axis is precessed to any desired direction in a crossed-field spin precessor. The design of the cesium beam system differs from previous sources in that magnetic deflection and focusing are used and beams of several milliamperes at energies of 40 keV are produced. The source is controlled by a microprocessor based system which is connected via fiber optic links to the main linac control and data acquisition computers. To date, currents of 1/mu/A and polarizations in excess of 90% have been produced. 3 refs., 2 figs.
- Research Organization:
- Washington Univ., Seattle, WA (USA). Nuclear Physics Lab.
- DOE Contract Number:
- AC06-81ER40048
- OSTI ID:
- 5634822
- Report Number(s):
- DOE/ER/40048-227-L9; CONF-890703-17; ON: DE89017313
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
430301* -- Particle Accelerators-- Ion Sources
BEAM EXTRACTION
BEAM FOCUSING MAGNETS
BEAM TRANSPORT
BEAMS
CESIUM IONS
CHARGE EXCHANGE
CHARGED PARTICLES
DATA ACQUISITION SYSTEMS
DESIGN
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
HYDROGEN 1 MINUS BEAMS
ION BEAMS
ION SOURCES
IONS
MAGNETS
POLARIZED BEAMS