250 MW, 11.4 GHz PPM coaxial ubitron
- Univ. of California, Davis, CA (United States). Dept. of Applied Science
- Stanford Linear Accelerator Center, CA (United States)
The design will be presented for a 250 MW X-band coaxial ubitron-FEL amplifier. The device will operate in the TE{sub 01} mode of a coaxial circuit using a hybrid wiggler with inner and outer annular permanent magnets. The use of the TE{sub 01} mode minimizes rf breakdown, since the electric field is zero at the walls. The coaxial geometry allows for a non-scalloping PPM-type stability condition with zero guide field. Although this coaxial PPM confinement geometry is ideal for ubitrons since it produces a strong azimuthal quiver motion, it can also be utilized to propagate high current annular electron beams for higher power, coaxial analogs of conventional linear-beam devices such as klystrons. Kiloampere-level electron beams can be transported for voltages in the range of 100--500 kV. The reduction in the fabrication cost from the use of this simple, unloaded fast-wave circuit will be an important consideration for future high power microwave amplifiers.
- OSTI ID:
- 428053
- Report Number(s):
- CONF-960634--
- Country of Publication:
- United States
- Language:
- English
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