Experimental and numerical investigation of auroral cyclotron maser processes

Phelps, A.D.R. and Speirs, David and McConville, S.L. and Gillespie, K.M. and Ronald, K. and Cross, A.W. and Bingham, R.; (2007) Experimental and numerical investigation of auroral cyclotron maser processes. In: Proceedings of the Eighth IEEE International Vacuum Electronics Conference. IEEE International Vacuum Electronics Conference IVEC . IEEE, Piscataway, N.J., pp. 429-430. ISBN 1-4244-0633-1

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In this paper the results of PiC code simulations and a laboratory experiment to investigate the evolution of an electron beam subject to magnetic compression of up to a factor of 30 is outlined. The experiment consisted of a 75 keV electron beam with significant initial sbeam with significant initial spread in velocity injected into an adjustable convergent magnetic field generated by a solenoid arrangement. The aim was to produce a horseshoe shaped electron velocity distribution and study the subsequent evolution of this distribution within an interaction waveguide at the peak of the axial magnetic field.