Observation of trapped H{sup {minus}} from trapped positive hydrogen ions
The relatively efficient in situ production of H{sup -} in an ion trap has been demonstrated. Electron impact ionization of H{sub 2} produces the trapped H{sup +} and H{sub 2}{sup +} and H{sub 2}{sup +}H{sub 2}{sup +} produces the H{sub 3}{sup +}. H{sup -} is produced by surface charge exchange of the trapped positive hydrogen ions at a cesiated HAVAR trap electrode. Proper timing of switched trapping potentials projects the positive ions to the cesiated surface and traps the H{sup -} ions. Hydrogen ions with energies of 0.5 to 6 eV are detected with high sensitivity at {nu}{sup +}= 2 to 4 MHz by a marginal oscillator with a synthetic Q of 6000-8000. H{sup -} yields from H{sup +}, H{sub 2}{sup +} and H{sub 3}{sup +} are currently being measured.
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 281534
- Report Number(s):
- CONF-9305421-; ISSN 0003-0503; TRN: 96:019460
- Journal Information:
- Bulletin of the American Physical Society, Vol. 38, Issue 3; Conference: 1993 American Physical Society annual meeting on atomic, molecular, and topical physics, Reno, NV (United States), 16-19 May 1993; Other Information: PBD: May 1993
- Country of Publication:
- United States
- Language:
- English
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