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1 2005

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Photoelectron emission and its instrumental effect on optogalvanic measurements in a hollow cathode discharge

Zhechev D., Bundaleska N., Costello J. T., Todorov D.

Opto-Electronics Review

2005

Vol. 13, No. 3

193-196

The photoelectron emission (PE) from the cathode surface of a hollow cathode discharge (HCD) with a sub-breakdown bias applied, and hence no discharge present, was measured within the framework of an optogalvanic (OG) experimental arrangement. The work function dependence on the applied sub-breakdown voltage was investigated. The PE component in a real OG measurement was found to manifest itself as an instrumental effect together with nonresonant ionization which we call here space ionization (SP). The convolution of these components was determined experimentally as an instrumental function. A deconvolution procedure to determine the actual OG signal was developed.