Charge-Exchange Atoms and Ion Source Divergence in a 20 TW Applied-{ital B} Ion Diode
- Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
- Weizmann Institute of Science, Rehovot, (Israel) 76100
Space- and time-resolved spectroscopy is used to measure properties of several-keV Li atoms in a 20TW ion diode. These measurements out in the diode anode-cathode gap are used in a charge-exchange model for the Li atom production in order to obtain the Li{sup +} beam angular divergence within 50{mu}m of the LiF-coated anode surface. This ion divergence near the surface is surprisingly large, and accounts for about half the typical 25mrad final accelerated-beam divergence. The measurements provide constraints for models attempting to explain highly diverging ion emission from thin alkali-halide films in {approximately}10 MV/cm applied fields. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- Sandia National Laboratory
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 388416
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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