Measurement of atomic and molecular hydrogen in a tandem magnetic multicusp H− ion source by VUV spectroscopy

Autor:	Ka-Ngo Leung, W. B. Kunkel, G. C. Stutzin, P. Chen, A. T. Young
Rok vydání:	1992
Předmět:	Electron density education.field_of_study Materials science Hydrogen Absorption spectroscopy Population chemistry.chemical_element Ion source chemistry Excited state Molecule Physics::Atomic Physics Atomic physics education Spectroscopy Instrumentation
Zdroj:	Review of Scientific Instruments. 63:2744-2746
ISSN:	1089-7623 0034-6748
DOI:	10.1063/1.1142842
Popis:	The populations of ground electronic state atomic hydrogen and ground electronic state, vibrationally–rotationally excited hydrogen molecule in a negative hydrogen ion source discharge have been measured using vacuum ultraviolet (VUV) laser absorption spectroscopy. These populations have been measured under a variety of discharge conditions in two different regions of a tandem chamber ion source. Preliminary results of the measurements in the driver region and filter region are given. It is observed that the atomic hydrogen density decreases as one goes from the driver to the filter region. This indicates that the surfaces directly adjacent to the filter region are net sinks for hydrogen atoms. In contrast, the molecular vibrational population distribution shows only a small difference between the two regions, indicating that these surfaces are not net sinks for the excited molecules.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fc3410bca24f3f00f8cc83a628aa5ee4 https://doi.org/10.1063/1.1142842 Zobrazit plný text záznamu