Basic features of electromagnetic pulse generated in a laser- target chamber at 3-TW laser facility PALS

摘要

We describe the radiofrequency emission taking place when 300 ps laser pulses irradiate various solid targets with an intensity of 10~(16) W/cm~2.The emission of intense electromagnetic pulses was observed outside the laser target chamber by two loop antennas up to 1 GHz.Electromagnetic pulses can be 800 MHz transients, which decay from a peak electromagnetic field of E_0≈7 kV/m and H_0 ≡ 15 A/m.The occurrence of these electromagnetic pulses is associated with generation of hard x-rays with photon energies extending beyond 1 MeV.This contribution reports the first observation of this effect at the PALS facility.