Hot Electron Energy Distribution in One-Dimensional Cannonball Target at 10.6 µm Laser Wavelength

Hot electron energy distribution in one-dimensional Cannonball target irradiated by a 10.6 µm laser pulse was investigated by using a multilayered foil technique. The experimental results suggested that the energy distribution of hot electrons in the Cannonball target was quite different from that in the simple planar target. We found that the high energy tail was truncated due to the effects of the presence of front disk in the Cannonball assembly. It is expected that Cannonball targets can quite effectively suppress the hot electron preheating at 10.6 µm laser wavelength.