Gyro-amplifiers require relativistic electron beams with low velocity spread and with a high fraction of the electron energy associated with the cyclotron motion. For harmonic operation and mode control an axis-encircling beam is desirable. The passage of an electron beam through a non-adiabatic magnetic field reversal (cusp) converts part of the electron beam's axial velocity into axis-encircling transverse velocity. This magnetic field is produced using two solenoids wound in opposite sense. The main cavity coil produces the field required for interaction whilst a smaller secondary coil, which is positioned just behind the cathode surface, produces a reverse field. A cusp-based electron beam forming system, yielding a 10MW, 150kV, 70A axis-encircling beam for use in a gyro-TWA will be presented. The latest results from numerical simulations and experiments are presented and compared.
Design and Simulation of a Cusp Gun for use in Gyro-amplifiers
2006-09-01
1090297 byte
Conference paper
Electronic Resource
English
Cusp gun TE/sub 21/ second-harmonic gyro-TWT amplifier
IEEE | 2002
|Cusp Gun TE~2~1 Second Harmonic Gyro-TWT Amplifier
British Library Conference Proceedings | 2002
|Effects of the Sever on Two-Stage Gyro-TWT Amplifiers
British Library Online Contents | 1997
|