Continuous rotating-wave electron beam accelerator
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United States of America Patent
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May 9, 2000
Grant Date -
N/A
app pub date -
Oct 17, 1997
filing date -
Oct 18, 1996
priority date (Note) -
Expired
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Abstract
An electron beam accelerator utilizes a single microwave resonator holding a transverse-magnetic circularly polarized electromagnetic mode and a charged-particle beam immersed in an axial focusing magnetic field. The combined effect of the transverse-magnetic microwave fields and the axial magnetic field provide the electron beam with a helical shape and a rotational motion which allows the entire beam to be continually accelerated to high energies in a dc-like fashion. The use of the transverse-magnetic circularly polarized electromagnetic mode allows the resonant frequency to be independent of resonator length--allowing the resonator length to be selected to achieve desired particle acceleration. Using a transverse-magnetic rotating wave mode, TM.sub.110, allows the cavity frequency to be independent of cavity length and eliminates the need for bunched beams and short cavities while allowing the use of a spiraling moving beam. The rotating wave electron beam has a number of applications including, for example, a compact, pulsed high energy electron beam generator within tool casing.
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