Production of fast neutral lithium beam for high temperature plasma probing

A high-current lithium ion beam of a few mAcm -2 with an energy of 12 keV and a minimum beam divergence of about 1.2° has been produced by using an ion source of the discharge type. Characteristics of the lithium ion beam regarding the intensity and divergence were experimentally investigated in det...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1987-03, Vol.26 (3), p.468-474
Main Authors: YAMAOKA, H, KADOTA, K, OKUNO, K, MASAMUNE, S, MIYAKE, S, FUJITA, J
Format: Article
Language:English
Subjects:
Exact sciences and technology
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma diagnostic techniques and instrumentation
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Summary:A high-current lithium ion beam of a few mAcm -2 with an energy of 12 keV and a minimum beam divergence of about 1.2° has been produced by using an ion source of the discharge type. Characteristics of the lithium ion beam regarding the intensity and divergence were experimentally investigated in detail. A lithium neutral beam has been produced using a sodium neutralizer. The neutralization efficiency of the lithium ion beam in the energy range of 2–15 keV was about 80% with a neutralizer at a vapor pressure of 1.7×10 -3 Torr. A mass analysis was performed when a mixed discharge of lithium and argon was used. The ratio of R (argon-ion current/lithium-ion current) became less than 0.1 at the oven temperature of the ion source to about 700°C. The applicability of a fast neutral lithium beam to plasma probing is discussed.
ISSN:0021-4922
1347-4065
DOI:10.1143/jjap.26.468