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Observations of a mode transition in a hydrogen hollow cathode discharge using phase resolved optical emission spectroscopy

Dixon, Sam; Charles, Christine; Dedrick, James; Gans, Timo; O'Connell, Deborah; Boswell, Rod

Description

Two distinct operational modes are observed in a radio frequency (rf) low pressure hydrogen hollow cathode discharge. The mode transition is characterised by a change in total light emission and differing expansion structures. An intensified CCD camera is used to make phase resolved images of Balmer α emission from the discharge. The low emission mode is consistent with a typical γ discharge, and appears to be driven by secondary electrons ejected from the cathode surface. The bright mode...[Show more]

CollectionsANU Research Publications
Date published: 2014-07-09
Type: Journal article
URI: http://hdl.handle.net/1885/28542
Source: Applied Physics Letters
DOI: 10.1063/1.4889916

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