Sources of polarized negative ions: progress and prospects
A summary of recent progress in the art of producing beams of polarized ions is given. In all sources of polarized ions, one first produces (or selects) neutral atoms which are polarized in electron spin. Those types of sources which use a beam of thermal polarized hydrogen atoms are discussed. Progress made in the preparation of the atomic beam and the methods used to convert the neutral atoms to polarized ions is summarized. The second type of source discussed is based on fast (keV) polarized hydrogen atoms. Conversion to negative ions is very simple because one only needs to pass the fast atoms through a suitable charge exchange medium (gas or vapor). However, the production of the polarized atoms is more difficult in this case. The proposal to employ polarized alkali vapor to form a beam of polarized fast H atoms, where the polarized alkali atoms are produced either by an atomic beam apparatus or by optical pumping is discussed. (WHK)
- Research Organization:
- Wisconsin Univ., Madison (USA)
- DOE Contract Number:
- AC02-76ER00007
- OSTI ID:
- 5582022
- Report Number(s):
- DOE/ER/00007-932; CONF-800994-21; ON: DE82011118
- Country of Publication:
- United States
- Language:
- English
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