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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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.
|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|
|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.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||27 Jun 2012 18:00|
|Last Modified:||26 Dec 2012 15:25|
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