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Experimental observation of further frequency upshift from dc to ac radiation converter with perpendicular dc
1Department of Energy and Environmental Science, Graduate School of Engineering, Utsunomiya University, Utsunomiya, Tochigi 3218585, Japan.
Abstract:
A frequency upshift of a short microwave pulse is generated by the interaction between a relativistic underdense ionization front and a periodic electrostatic field with a perpendicular dc magnetic field. When the dc magnetic field is applied, further frequency upshift of 3 GHz is observed with respect to an unmagnetized case which has typically a GHz range. The radiation frequency depends on both the plasma density and the strength of the dc magnetic field, i.e., the plasma frequency and the cyclotron frequency. The frequency of the emitted radiation is in reasonable agreement with the theoretical values.
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