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Proceedings Paper

Long-pulse relativistic magnetron experiments
Author(s): Michael R. Lopez; Ronald M. Gilgenbach; Yue Ying Lau; David W. Jordan; Mark W. Johnston; M. C. Jones; V. B. Neculaes; T. A. Spencer; John W. Luginsland; Michael D. Haworth; Raymond W. Lemke; David Price; Lars Ludeking
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Paper Abstract

Research is underway on a 6-vane Titan Corp. L-Band relativistic magnetron operating at about 1 GHz. For equal power in both extraction waveguides, the peak microwave power of this device is between 200 MW and 300 MW. Microwave pulse shortening limits pulselengths to the range of 10-100 ns. Two cold cathodes designs were tested: emitting aluminum knob in the vane region with no endcap, and extended cathode with graphite fiber emission region in the vanes and endcap outside the vanes. With no endcap, the cathode exhibited endloss current fraction up to 50% of the total; with one endcap, the cathode reduced the endloss current fraction to as little as 12%. Both cathodes produced peak total- electronic efficiency in the range of 14% to 21%.

Paper Details

Date Published: 10 June 2002
PDF: 8 pages
Proc. SPIE 4720, Intense Microwave Pulses IX, (10 June 2002); doi: 10.1117/12.469838
Show Author Affiliations
Michael R. Lopez, Univ. of Michigan (United States)
Ronald M. Gilgenbach, Univ. of Michigan (United States)
Yue Ying Lau, Univ. of Michigan (United States)
David W. Jordan, Univ. of Michigan (United States)
Mark W. Johnston, Univ. of Michigan (United States)
M. C. Jones, Univ. of Michigan (United States)
V. B. Neculaes, Univ. of Michigan (United States)
T. A. Spencer, Air Force Research Lab. (United States)
John W. Luginsland, Science Applications International Corp. (United States)
Michael D. Haworth, Air Force Research Lab. (United States)
Raymond W. Lemke, Sandia National Labs. (United States)
David Price, Titan Corp. (United States)
Lars Ludeking, Mission Research Corp. (United States)

Published in SPIE Proceedings Vol. 4720:
Intense Microwave Pulses IX
Howard E. Brandt, Editor(s)

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