Patent ID: 7889844

Claim:
A multi-X-ray generator comprising: a chamber; a plurality of electron emission elements provided inside said chamber; an acceleration unit provided inside said chamber, and configured to accelerate electron beams emitted from said plurality of electron emission elements; and a target portion which is irradiated with the electron beams, wherein said target portion is provided inside said chamber and in correspondence with the electron beams; a first X-ray shielding unit provided on an X-ray ejection side of said target portion; and a second X-ray shielding unit which is provided outside said chamber and is configured to be replaced in an atmosphere; and a third X-ray shielding unit provided inside said chamber and provided on an electron beam irradiation side of said target portion, wherein X-rays generated from said target portion are extracted as multi-X-ray beams into the atmosphere through the first and second X-ray shielding units, and wherein said third shielding unit is configured to suppress scattered X-rays and reflected electron beams, and comprises an incident hole for an electron beam.