Abstract
An electron gun (80 kV / 75 A) for a 170 GHz coaxial cavity gyrotron has been designed, fabricated and tested. Special care has been devoted to the design of the technical part of the electron gun in order to avoid trapping of electrons, which may result in a limitation of the high voltage performance due to built-up of a Penning discharge which may limit the high voltage performance. The performance of the electron gun and electron beam has been found to be well in agreement with the design objective. A stable operation up to Ib = 80 A and Uc = 80 kV has been obtained without any observable beam instabilities. No limitations in high voltage performance due to built-up of a Penning discharge occurred. The influence of the type of electron flow on gyrotron performance has been studied experimentally. The maximum output power has been obtained for an intermediate type of flow.
Similar content being viewed by others
References
B. Piosczyk et al., “Towards a 2 MW, CW, 170 GHz coaxial cavity gyrotron for ITER”. Fusion Eng. and Design, 66–68 (2003), pp. 481–485.
B. Piosczyk, “A novel 4.5 MW electron gun for a coaxial gyrotron”, IEEE Trans. Electron Devices, vol. 48,12, 2938–2944, 2001.
V.K. Lygin et al., “Inverse magnetron injection gun for a coaxial 1.5 MW, 140 GHz gyrotron”, Int.J.Electron., vol. 79, pp. 227–235, 1995.
R. Advani et al., “Experimental investigation of a 140 GHz coaxial gyrotron oscillator”, IEEE Trans. Plasma Science, vol 29,6, 943–950, 2001.
M.E. Read et al., “Design of a 3 MW, 140 GHz gyrotron with a coaxial cavity”, IEEE Trans. Plasma Science, vol. 24,3, 586–595, 1996.
I. Yovchev et al., “Design of the ITER 170 GHz gyrotron gun”, 29th Int. Conf. Infrared and Millimeter Waves, Sept. 27–Oct. 01. 2004, Karlsruhe, Germany, 645–646.
S. Illy, “ESRAY-trajectory code”, FZK Karlsruhe
Sh. Tsimring, V.N. Manuilov, B.V. Raisky, Electron Trajectory Program. EPOSR, Institute of Applied Physics, Nizhny Novgorod. Russia, 1993.
W.B. Herrmannsfeldt, Electron Trajectory Program, Stanford University, Stanford, California, SLAC-226, 1979.
R.T. Longo, “A study of thermionic emitters in the regime of practical operation”, Technical Digest, 1980 International Electron, Device Meeting, pp.467–470
G. Dammertz et al., “Development of a 140 GHz, 1 MW continuous wave gyrotron for the W7-X stellarator”, IEEE Trans. Plasma Science, vol. 30,3, 808–818, 2002.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Piosczyk, B. A COAXIAL MAGNETRON INJECTION GUN (CMIG) FOR A 2 MW, 170 GHz COAXIAL CAVITY GYROTRON. Int J Infrared Milli Waves 27, 1041–1061 (2006). https://doi.org/10.1007/s10762-006-9097-4
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10762-006-9097-4