Title :
On the negative-mass instability in gyrotrons
Author :
Dumbrajs, I. ; Nikkola, P. ; Piosczyk, B.
Author_Institution :
Dept. of Eng. Phys. & Math., Helsinki Univ. of Technol., Espoo, Finland
Abstract :
Space-charge effects, the so-called negative-mass instability (NMI), as the reason for electron energy spread arising in the region of the electron drift between the cathode and the cavity of a gyrotron are discussed. Theoretical calculations are compared with the results of the experiments performed at Forschungszentrum Karlsruhe.
Keywords :
cathodes; cavity resonators; gyrotrons; millimetre wave generation; millimetre wave tubes; space charge; stability; 140 GHz; 165 GHz; Forschungszentrum Karlsruhe; cathode; cavity; electron drift; electron energy spread; gyrotrons; negative-mass instability; space-charge effects; Cyclotrons; Electron beams; Energy measurement; Fluctuations; Frequency; Gyrotrons; Magnetic field measurement; Masers; Performance evaluation; Resonance;
Conference_Titel :
Infrared and Millimeter Waves, 2000. Conference Digest. 2000 25th International Conference on
Conference_Location :
Beijing, China
Print_ISBN :
0-7803-6513-5
DOI :
10.1109/ICIMW.2000.893072
