Measurement of the Radiofrequency-microwave Pulse Produced in Experiments of Laser-plasma Interaction in the ABC Laser Facility

The emission of electromagnetic waves in the radiofrequency-microwave range has been observed in many experiments of laser- plasma interaction. These fields can have very high intensity and estimated frequency band up to several gigahertz. The radiation normally affects the behaviour of most of the detectors, often up to hundreds of nanoseconds from the laser pulse, and can represent a serious limitation for the time-of-flight detection of fast particles, and in general for the safe operation of the electronic equipment. In this work we describe the measurements of this electromagnetic pulse, under different conditions of laser-plasma interaction.