Spectroscopic Measurements of Plasma Ion Density by Neutral Beam Probing

Autor:	Shintaro Fukumoto, Yoshifumi Ito, Tsutomu Ishimura, Seiichi Goto
Rok vydání:	1983
Předmět:	Electron density Range (particle radiation) Hydrogen Chemistry General Engineering General Physics and Astronomy chemistry.chemical_element Plasma Laser law.invention Ion Ion beam deposition Physics::Plasma Physics law Atomic physics Beam (structure)
Zdroj:	Japanese Journal of Applied Physics. 22:981
ISSN:	1347-4065 0021-4922
DOI:	10.1143/jjap.22.981
Popis:	A method of determining plasma ion density by spectroscopic measurement of line emission from a probing neutral beam, attenuated by resonance charge transfer interaction with plasma ions, is proposed and tested. A hydrogen plasma produced by an R.F. discharge was used as the subject of the test. The parameters of the hydrogen probing beam in the region of observation were ∼400 eV average energy, ∼3×1012 cm-3 peak density and ∼2 µs pulse width. The beam was produced by a z-pinch-gun, a neutral beam source. From the attenuation rate of Hβ emission and the known cross-section of the interaction, the ion density was determined when it was in the range from 2×1014 cm-3 to 5×1014 cm-3. The value determined agreed well with the electron density measured with an He–Ne laser interferometer.
Databáze:	OpenAIRE
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