| 摘要 |
A field-producing permanent magnet fitting within the annular cathode of a crossed-field device, such as the magnetron. The magnet is an annular device having an inner cylinder of high-permeability steel forming a flux return path for the middle cylinder which is made of radially gaussed samarium cobalt material, and an outer section comprising two rings of high-permeability steel, one at each end of said middle section, forming pole pieces for the distribution of flux thru the interaction region of said crossed-field device.
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