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Design and operation of a stable intense high-temperature arc-discharge source of hydrogen atoms and metastable trihydrogen molecules

Garvey, James F. and Kuppermann, Aron (1986) Design and operation of a stable intense high-temperature arc-discharge source of hydrogen atoms and metastable trihydrogen molecules. Review of Scientific Instruments, 57 (6). pp. 1061-1065. ISSN 0034-6748. http://resolver.caltech.edu/CaltechAUTHORS:20120627-104220301

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Abstract

We report a design for a stable intense beam source of hyperthermal hydrogen atoms. The basis for the design is an arc heater used first by Knuth for the generation of high‐translational energy He–Ar beams. In the case of hydrogen atom generation this source is very unstable due to the corresponding higher temperatures which are generated by the plasma discharge. We have substantially eliminated these difficulties by the insertion of discharge‐localizing insulators and the use of a tungsten nozzle mounted in the center of a 1‐kG electromagnet. This source generates exceptionally high hydrogen atom beam intensities of ∼10^(22) atoms s^(−1) sr^(−1) with translational energy distribution functions which extend to 18 eV and whose peak occurs at energies as high as 13 eV. In addition metastable H_3 molecules having an intensity between 10^(20) and 10^(21) molecules s^(−1) sr^(−1) are formed.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.1138659DOIUNSPECIFIED
http://rsi.aip.org/resource/1/rsinak/v57/i6/p1061_s1PublisherUNSPECIFIED
Additional Information:© 1986 American Institute of Physics. Received 2 December 1985; accepted for publication 27 February 1986.
Subject Keywords:HYDROGEN, DESIGN, OPERATION, STABILITY, HIGH TEMPERATURE, BEAM PRODUCTION, ELECTRIC ARCS, METASTABLE STATES, NOZZLES, EV RANGE 10−100, MOLECULAR BEAMS, ATOMIC BEAM SOURCES, ARGON, EFFICIENCY, HOLLOW CATHODES
Classification Code:PACS: 52.80.Mg, 29.25.-t, 07.77.-n
Record Number:CaltechAUTHORS:20120627-104220301
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120627-104220301
Official Citation:Design and operation of a stable intense high‐temperature arc‐discharge source of hydrogen atoms and metastable trihydrogen molecules James F. Garvey and Aron Kuppermann Rev. Sci. Instrum. 57, 1061 (1986); http://dx.doi.org/10.1063/1.1138659
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:32138
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:27 Jun 2012 18:00
Last Modified:26 Dec 2012 15:25

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