Patent ID: 7994483

Claim:
A gas electron multiplier using interaction between radiation and gas through photoelectric effects, comprising: a chamber filled with gas; and a single gas electron multiplication foil arranged in the said chamber, wherein the said gas electron multiplication foil is made of a plate-like multilayer body which is composed of a multilayer body where multiple plate-like insulation layers made of a macromolecular polymer material are stacked with a flat metal layer sandwiched in between and flat metal layers overlaid on both surfaces of said multilayer body, the flat metal layer having a thickness of approximately 5 μm sandwiched in between said multiple plate-like insulation layers and the flat metal layers overlaid on both surfaces of said multilayer body each have a thickness of approximately 5 μm and the said plate-like multilayer is provided with a through-hole structure, said through-hole structure extending in the direction perpendicular to a plane of the flat metal layer sandwiched in between said multiple plate-like insulation layers and the flat metal layers overlaid on both surfaces of said multilayer body.