Density Measurements of Negative Hydrogen Ions Using Mass Spectrometer

  • Y. Abate
  • M. Arciaga
  • H. Ramos

Abstract

Measurement of negative ion density in a source plasma is necessary for optimizing the extraction of negative ion current. Bacal and co-workers proposed a method to measure the negative ion density by detaching the electron current due to the photodetachment of negative ions using a pulse laser (Bacal et al., 1979). This paper describes a method to determine the negative ion density in a plasma by a coupled mass analysis and Langmuir probe diagnosis of the plasma. The H- ion density was estimated from the relation equating the ratio of the negative ion and electron currents to the ratio of the ion and electron densities; I- / Ic = n- / nc. The proposed estimates consider the collection factor n- / nc.
Published
2012-07-03
How to Cite
ABATE, Y.; ARCIAGA, M.; RAMOS, H.. Density Measurements of Negative Hydrogen Ions Using Mass Spectrometer. Science Diliman: A Journal of Pure and Applied Sciences, [S.l.], v. 13, n. 2, july 2012. ISSN 2012-0818. Available at: <https://journals.upd.edu.ph/index.php/sciencediliman/article/view/179>. Date accessed: 31 aug. 2025.
Citation Formats
Issue
Vol 13 No 2 (2001)
Section
Articles
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