ISSN 0869-6632 (Print)
ISSN 2542-1905 (Online)

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Luksha O. I., Sominski G. G., Samsonov D. B., Dammertz G. ., Piosczyk B. ., Thumm M. . Investigation of possibility to use ion treatment for enhancement of gyrotron cathode quality. Izvestiya VUZ. Applied Nonlinear Dynamics, 2008, vol. 16, iss. 3, pp. 129-141. DOI: 10.18500/0869-6632-2008-16-3-129-141

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537.58, 539.534.9

Investigation of possibility to use ion treatment for enhancement of gyrotron cathode quality

Luksha Oleg Igorevich, Peter the Great St. Petersburg Polytechnic University
Sominski G. G., Peter the Great St. Petersburg Polytechnic University
Samsonov Dmitrij Borisovich, Peter the Great St. Petersburg Polytechnic University
Dammertz Gunter , University Bonn
Piosczyk Bernhard , Research Center
Thumm Manfred , Research Center

A method for gyrotron cathode treatment by flow of potassium ions has been developed, and the effect of ion bombardment on the emission characteristics of W-Ba and LaB6 cathodes has been investigated. The influence of cathode surface material, cathode emission activity and ion energy on the result of ion treatment was revealed. It was shown that ion bombardment can be used for the increase of cathode emission uniformity due to the activation of the W-Ba cathode areas with low electron emission and due to the deactivation of the LaB6 cathode areas with high electron emission. The obtained data demonstrate that the activation of the W-Ba cathode and the deactivation of the LaB6 cathode are not connected with the potassium deposition on the cathode but can be caused by desorption of atoms from the cathode surface and/or by reconstruction of this surface.

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