Electromagnetic wave radiation of extraordinary mode from array of periodic electrostatic field with short laser pulse immersed in DC magnetic field

A short microwave pulse is generated by the interaction between a periodic electrostatic field and a laser produced relativistic, underdense ionization front. An enlarged frequency upshift of an emitted radiation from a DC to AC radiation converter (DARC) with a perpendicular DC magnetic field is expected. The emitted frequency is upshifted the maximum 30 % compared to an unmagnetized DARC. The frequency of the emitted radiation depends on both the plasma density and the strength of the static magnetic field. The observed frequency is in good agreement with the theoretical value.