Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

The design of a 390 GHz gyrotron based on a cusp electron gun

Li, F. and He, W. and Phelps, A. D. R. and Donaldson, C. R. and Zhang, L. and Cross, A. W. and Ronald, K. (2010) The design of a 390 GHz gyrotron based on a cusp electron gun. In: 35th International Conference on Infrared, Millimeter and Terahertz Waves, 2010-09-05 - 2010-09-10, Rome.

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

A 390 GHz harmonic gyrotron based on a cusp electron gun was designed to operate on a TE71 mode and the 7(th) cyclotron harmonic of a large orbit electron beam. This beam is produced by a cusp electron gun with a voltage of 40 keV, a current of 1.5 A and an adjustable velocity ratio from 1 to 3. Smooth cylindrical waveguide was studied and built as the interaction cavity. The relationship between the cavity dimensions and cavity Q was optimized for output at the design mode. A simple linear output taper with moderate mode conversion was used in the gyrotron output. Both theoretical analysis and numerical simulation results (using the 3D PIC code MAGIC) of this gyrotron will be presented. When the beam thickness and beam spread were introduced into the simulation, competitive modes were observed in the simulation resulting in a drop in the output power. A high frequency (325-500 GHz) VNA was used to measure the millimeter wave properties of the gyrotron cavity and the results are presented in this paper.

Item type: Conference or Workshop Item (Paper)
ID code: 30260
Notes: 35th International Conference on Infrared, Millimeter and Terahertz Waves, Rome, ITALY, SEP 05-10, 2010
Keywords: TWT amplifier, 390 GHz gyrotron, cusp electron gun, Physics
Subjects: Science > Physics
Department: Faculty of Science > Physics
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 08 Apr 2011 11:51
    Last modified: 04 Oct 2012 17:43
    URI: http://strathprints.strath.ac.uk/id/eprint/30260

    Actions (login required)

    View Item