Further frequency upshift in DC to AC radiation converter by perpendicularDC magnetic field

Theory of electromagnetic wave radiation by the interaction of a relativist ic ionization front with a periodic: electrostatic held using a perpendicul ar DC magnetic field has been developed. The frequency shifts, transmission and reflection coefficients of the radiation an shown to depend on both th e plasma density and the magnetic field strength. Compared with an unmagnet ized case, further frequency upshift of the emitted radiation is found, alt hough the conversion rate decreases. This mechanism can be used as a new te chnique for tunable electromagnetic wave radiation sources.