For citation:
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
Investigation of possibility to use ion treatment for enhancement of gyrotron cathode quality
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.
- Gaponov-Grekhov AV, Granatstein VL. Applications of High Power Microwaves. Boston, MA: Artech House; 1994. 364 p.
- Nusinovich GS. Introduction to the Physics of Gyrotrons. Baltimore, MD: Johns Hopkins University Press; 2004. 352 p.
- Thumm M. State-of-the-art of high power gyro-devices and free electron masers Update 2005. Karlsruhe: Forshungszentrum Karlsruhe; 2006.
- Tsimring SE. Gyrotron electron beams: velocity and energy spread and beam instabilities. Int. J. Infrared Millimeter Waves. 2001;22(10):1433–1468. DOI: 10.1023/A:1015034506088.
- Louksha OI, Sominski GG, Kas’yanenko DV. Experimental study and numerical modeling of the electron beam formed in the electron-optical system of a gyrotron. J. Commun. Technol. Electron. 2000;45(Suppl. 1):S71–S75.
- Glyavin MY, Goldenberg AL, Kuftin AN, Lygin VK, Postnikova AS, Zapevalov VE. Experimental studies of gyrotron electron beam systems. IEEE Trans. Plasma Sci. 1999;27(2):474–483. DOI: 10.1109/27.772276.
- Abroyan IA, Andronov AN, Titov AI. Physical Foundations of Electronic and Ionic Technology. Moscow: Vysshaya Shkola; 1984. 320 p. (in Russian).
- Louksha OI, Tsybin OY. Investigation of the emission of atomic particles from the surface of the electron gun hot cathode. Tech. Phys. 1992;62(10):154–159 (in Russian).
- Louksha OI, Piosczyk B, Sominski GG, Thumm MK, Samsonov DB. On potentials of gyrotron efficiency enhancement: measurements and simulations on a 4-mm gyrotron. IEEE Trans. Plasma Sci. 2006;34(3):502–511.
- Tumareva TA, Sominskii GG, Bondarenko AK, Veselov AA. Activation of fullerene coatings on field emitters by potassium atom and ion fluxes. Tech. Phys. 2006;51(7):898–901. DOI: 10.1134/S1063784206070140.
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