Characterization of Energetic Protons Generated in the ShenGuang-II UP Petawatt Laser Interactions with Foil Targets

Figure 2

(a) A typical laser focus image recorded by an X-ray pinhole camera. PSL is the unit of the signal intensity on the imaging plate. (b) Curves of the cumulative laser energy fraction as functions of laser intensity and focus diameter obtained from (a). (c) Experimental results measured in each shot. The shot number 1 is chosen as the typical shot (data in the green box).

(a)

(b)

(c)