▎ 摘　　要

NOVELTY - Ion generation composite target comprises: a substrate having a through hole formed on it; and a graphene thin film configured on the substrate, across the through hole, having a thickness of 1-3 nm, and ionized to release a proton or a carbon ion. The carbon-based thin film is one comprising an acrylic thin film, polymethyl methacrylate thin film, plastic thin film and an organic polymer thin film, the hydrocarbon-based thin film is one comprising an acrylic thin film, polymethyl methacrylate thin film, a plastic thin film, and an organic polymer thin film, the metallic material thin film is one comprising precious metal thin film, a gold thin film and a copper foil. USE - The target is useful for an ion irradiation technology in laser-driven ion acceleration apparatus (all claimed). ADVANTAGE - The target: resolves an issue of the prior art in which carbon based materials are easy to be made into so thin targets that they are also susceptible to be damaged by pre-pulse during the generation of carbon ions; and effectively improves the tolerance of the target to high-intensity laser pre-pulse, greatly increase the generation efficiency of high-energy carbon ions and provides a mechanism for accelerating particles of high atomic mass and high electric charge value. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a laser-driven ion acceleration apparatus. DESCRIPTION OF DRAWING(S) - The figure shows a schematic diagram illustrating the electrolytic bubble scheme for removing copper foil substrate formed on graphene film. Copper foil substrate (40) Graphene film (41) Cathode (43) Conductor (45) Anode (46)