Title :
Observation of Low-Frequency Parasitic Oscillations in a 1.5 MW, 110 GHz Gyrotron
Author :
Marchewka, C.D. ; Choi, E.M. ; Shapiro, M.A. ; Sirigiri, J.R. ; Temkin, R.J.
Author_Institution :
MIT Plasma Sci. & Fusion Center
Abstract :
We report the observation of low-frequency parasitic oscillations, near 100 MHz, in a 1.5 MW, 110 GHz gyrotron operating in 3 microsecond pulses at MIT. The oscillations were measured on capacitive probes, which are located near the microwave resonator and are ordinarily used to measure the beam velocity pitch factor. The dependence of the frequency of oscillation on beam current, voltage, and magnetic compression ratio is discussed as are the regions of I-V space, in which the oscillations exist
Keywords :
gyrotrons; millimetre wave tubes; oscillations; 1.5 MW; 110 GHz; beam velocity pitch factor; capacitive probes; low-frequency parasitic oscillations; microwave resonator; millimeter wave gyrotron; oscillation measurement; Electron beams; Electron traps; Fourier transforms; Frequency; Gyrotrons; Microwave measurements; Probes; Pulse measurements; Velocity measurement; Voltage;
Conference_Titel :
Vacuum Electronics Conference, 2006 held Jointly with 2006 IEEE International Vacuum Electron Sources., IEEE International
Conference_Location :
Monterey, CA
Print_ISBN :
1-4244-0108-9
DOI :
10.1109/IVELEC.2006.1666419
