A cusp electron gun for millimeter wave gyrodevices

作者：Donaldson C R^*; He W; Cross A W; Li F; Phelps A D R; Zhang L; Ronald K; Robertson C W; Whyte C G; Young A R

来源：Applied Physics Letters, 2010, 96(14): 141501.

DOI：10.1063/1.3374888

• electron guns
• gyrotrons
• millimetre wave devices
• submillimetre wave devices

The experimental results of a thermionic cusp electron gun, to drive millimeter and submillimeter wave harmonic gyrodevices, are reported in this paper. Using a "smooth" magnetic field reversal formed by two coils this gun generated an annular-shaped, axis-encircling electron beam with 1.5 A current, and an adjustable velocity ratio alpha of up to 1.56 at a beam voltage of 40 kV. The beam cross-sectional shape and transported beam current were measured by a witness plate technique and Faraday cup, respectively. These measured results were found to be in excellent agreement with the simulated results using the three-dimensional code MAGIC.

• 出版日期2010-4-5