Proton absolute energy spectrum measuring device

The utility model discloses a proton absolute energy spectrum measuring device. The proton absolute energy spectrum measuring device comprises a Thomson ion spectrometer and a radiochromic membrane stack which are sequentially arranged from an aiming laser emitting end to an experimental target placing end; a central through hole is formed in the center of the radiation color-changing membrane stack; the axis of the central through hole is overlapped with the axis of an inlet/outlet hole of the Thomson ion spectrometer; the Thomson ion spectrometer is used for receiving the aiming laser and enabling the laser to penetrate through the central through hole of the radiation color-changing membrane stack to reach the experimental target point; the experimental target is used for receiving the experimental target laser and accelerating the experimental target laser to generate protons, the protons generated by laser acceleration irradiate the radiation color-changing membrane stack to realize ...