Phase-locking of a second-harmonic gyrotron oscillator using a quasi-optical circulator to separate injection and output signals

Summary form only given, as follows. Phase-locking in a 34.5 GHz special complex cavity gyrotron oscillator operating at the second harmonic of the electron cyclotron frequency was studied. Injection of the locking power was made via a quasi-optical circulator connected to the gyrotron output. Locki...

Full description

Saved in:
Bibliographic Details
Main Authors: Guo, H.Z., Hoppe, D.J., Rodgers, J., Perez, R.M., Tate, J., Conroy, B.L., Granatstein, V.L., Bhanji, A., Latham, P.E., Nusinovich, G.S., Naiman, M.
Format: Conference Proceeding
Language:English
Subjects:
Bandwidth
Cyclotrons
Electrons
Frequency
Gyrotrons
Oscillators
Phase measurement
Power generation
Q factor
Resonance
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Summary form only given, as follows. Phase-locking in a 34.5 GHz special complex cavity gyrotron oscillator operating at the second harmonic of the electron cyclotron frequency was studied. Injection of the locking power was made via a quasi-optical circulator connected to the gyrotron output. Locking bandwidth was measured by comparing the phase of the injection signal and output signal using a balanced mixer. Locking was observed with input power level as low as 40 dB below the gyrotron output power. The locking bandwidth is, however, narrower than in gyrotrons operating at the fundamental cyclotron frequency which may be attributed to the longer resonant cavity in the second harmonic gyrotron and the corresponding larger value of external quality factor. The measurements are roughly in agreement with predictions of Adler's phase-locking equation which is given for our system in terms of powers propagating in the output waveguide toward and away from the gyrotron cavity.
ISSN:0730-9244
2576-7208
DOI:10.1109/PLASMA.1995.531748