| AAPPS Bulletin
Vol. 16 No. 2,
April 2006 |
Highlight of the Issue
Theory of Split-Anode Magnetrons by
Sin-itiro Tomonaga (PDF, 751KB)
Koichi Shimoda
Professor Emeritus,
University of Tokyo, Japan
Abstract
During the World War II theory of the magnetron was developed
by S. Tomonaga in collaboration with M. Kotani. Assuming a
parabolic potential between the cathode and the cylindrical
anode of the magnetron, he calculated the electron orbits
perturbed by the oscillating field of the anode. Secular change
of the electron orbit results in the formation of rotating space
charge inside the split-anode magnetron, which is found to
enhance the oscillating field when a resonance condition is
satisfied. |
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