Effect of emission inhomogeneities on low-frequency oscillations in gyrotron-type electron beams

Effect of emission inhomogeneities on low-frequency oscillations in gyrotron-type electron beams

Plasma heating in large tokamaks is one of the most attractive applications for millimeter wave gyrotrons. Gyrotrons designed and created in Russia for this purpose have megawatt microwave power level in quasi-CW regime (in single pulses with duration t>1s). Their effective operation is impeded b...

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Hauptverfasser: Ilyin, V.N., Louksha, O.I., Mjasnikov, V.E., Popov, L.G., Sominski, G.G.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Cathodes
Electromagnetic heating
Electron traps
Gyrotrons
Impedance
Mirrors
Plasma applications
Plasma waves
Space charge
Tokamaks
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container_start_page 800
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creator Ilyin, V.N.
Louksha, O.I.
Mjasnikov, V.E.
Popov, L.G.
Sominski, G.G.
description Plasma heating in large tokamaks is one of the most attractive applications for millimeter wave gyrotrons. Gyrotrons designed and created in Russia for this purpose have megawatt microwave power level in quasi-CW regime (in single pulses with duration t>1s). Their effective operation is impeded by low-frequency (/spl sim/100 MHz) spurious oscillations of electron space charge accumulated in the trap between gun cathode and magnetic mirror. These oscillations often develop after a long-term operation of a gyrotron. Modification of cathode emission characteristics can be one of the most probable causes of this phenomenon. Our paper reports the results of the study of space charge oscillations in gyrotron trap and effect of emission inhomogeneities on their characteristics.
doi_str_mv 10.1109/BEAMS.1998.816974
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ispartof 12th International Conference on High-Power Particle Beams. BEAMS'98. Proceedings (Cat. No.98EX103), 1998, Vol.2, p.800-803 vol.2
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subjects Cathodes
Electromagnetic heating
Electron traps
Gyrotrons
Impedance
Mirrors
Plasma applications
Plasma waves
Space charge
Tokamaks
title Effect of emission inhomogeneities on low-frequency oscillations in gyrotron-type electron beams
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