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.


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    Title :

    Design and Simulation of a Cusp Gun for use in Gyro-amplifiers


    Contributors:
    Rowlands, D.H. (author) / He, W. (author) / Whyte, C.G. (author) / Young, A.R. (author) / Cross, A.W. (author) / Phelps, A.D. R. (author) / Robertson, C.W. (author) / Ronald, K. (author)


    Publication date :

    2006-09-01


    Size :

    1090297 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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