Abstract
A cusptron device operating at eighth cyclotron harmonic has been set up for the development of a compact and high-power microwave source. An axis-encircling electron beam of 25 KeV (γ= 1.05) as the radiation source is produced from an annular thermionic cathode of 1.1-cm radius and 0.16-cm radial thickness with a Pierce-type focusing electrode together with a cusp magnetic field. Slotted cylindrical waveguides similar to the anode blocks of magnetron are used. Like the magnetron device, the cusptron can have π-mode and 2π-mode operations. It is the purpose of this work to identify experimentally which is the more efficient mode of operation. A comparison of the operations is made by imposing a fixed output frequency in the waveguide design. For the 2π-mode operation, an 8-slotted waveguide with b/a = 2.2 is used, where b and a are the radii of the slots and the inner wall of the waveguide, respectively. A 16-slotted waveguide with b/a = 1.23 is used for the π-mode operation. The functional dependence of the radiation efficiencies on beam current at fixed beam energy (γ= 1.05) has also been studied.
| Original language | English (US) |
|---|---|
| Pages | 104-105 |
| Number of pages | 2 |
| State | Published - 1988 |
| Event | IEEE International Conference on Plasma Science - 1988 - Seattle, WA, USA Duration: Jun 6 1988 → Jun 8 1988 |
Other
| Other | IEEE International Conference on Plasma Science - 1988 |
|---|---|
| City | Seattle, WA, USA |
| Period | 6/6/88 → 6/8/88 |
ASJC Scopus subject areas
- General Engineering