Experimental studies of characteristic of hot electron energy sediment in the physics of intense field

Hot electron spectrum in the interaction of femtosecond laser with solid target is measured on the 100 TW laser. Along the rear laser propagation, the high energy tail is obtained with efficiency temperature of hot electrons T ≈ 83 KeV; and an yield and fluence of hot electron along rear laser propagation of targets are obtained. The result shows that the fluence and total energy of hot electrons decreases with the increase of target thickness, and about 80% of the energy of hot electrons deposits in front side of 10 μm in target, which is induced by static state electric field effect.