Emission of short microwave pulse radiated by interaction between periodicstatic electric field and relativistic ionization front

Experimental results on "DARC (DC to AC radiation converter)" using 4 omega (0) light of a Nd:YAG laser with a pulse duration of similar to 6 ns are re ported. Electromagnetic wave generation has been observation in the interac tion experiments between a static electric field and a relativistic ionizat ion front. The frequency of the emitted microwave pulse (similar to 6ns) ra nges from 9.5 GHz to 14.1 GHz. The output signal intensity is proportional to the DC bias voltage with a power of 2.3. The emitted radiation field is polarized along the static electric field direction. The pulse duration of the emitted radiation is a long as that of the ionizing laser. This indicat es that the pulse that the pulse duration strongly depends on the ionizatio n process by the laser light.