Abstract
The Naval Research Laboratory has been studying the operation of an 11 GHz frequency-doubling magnicon amplifier driven by a approx. 650 kV, 225 A, 5.5-mm-diam. electron beam produced by a velvet cathode driven by a single-shot Marx generator. Based on recent experimental results, it became evident that the NRL program must transition to a thermionic electron gun, a rep-rated modulator (to allow rf conditioning), and an ultrahigh vacuum environment (to suppress the intracavity plasma generation) in order to demonstrate the feasibility of an efficient, long-pulse, high-duty-factor magnicon amplifier at 11.4 GHz for linear accelerator applications. The authors have designed a new thermionic magnicon experiment, incorporating an advanced high-convergence electron gun to produce a 500 kV, 200 A, 2-mm-diam electron beam, an improved deflection cavity design, and an improved output cavity that employs side-coupling to extract the rf power through a pair of X-band waveguides separated by 135° around the azimuth of the cavity without destroying the symmetry of the rotating quadrupole mode. The predicted efficiency is approx. 60%.
Original language | English (US) |
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Pages (from-to) | 231 |
Number of pages | 1 |
Journal | IEEE International Conference on Plasma Science |
State | Published - 1996 |
Externally published | Yes |
Event | Proceedings of the 1996 IEEE International Conference on Plasma Science - Boston, MA, USA Duration: Jun 3 1996 → Jun 5 1996 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering