Patent ID: 11921252
Assignee: KOREA ATOMIC ENERGY RESEARCH INSTITUTE
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 16:
17. A security screening device, comprising:
a radiation generator configured to produce an X-ray and neutron radiation and irradiate the X-ray and the neutron radiation toward an inspection object;
an inspection object transfer unit configured to change a position of the inspection object;
a radiation detector configured to detect an X-ray and neutron radiation passed through the inspection object; and
a gamma ray detector that is installed adjacent to the inspection object and is configured to detect a gamma signal generated from the inspection object;
wherein the radiation detector obtains image information of the inspection object using radiation information detected from the X-ray and the neutron radiation passed through the inspection object, and
wherein the gamma ray detector analyzes a detected gamma ray to analyze the inspection object, and identifies a location of the inspection object from the image information,
wherein the X-ray and the neutron radiation are alternately produced with a predetermined time difference by the radiation generator to be irradiated toward the inspection object,
the radiation generator includes:
an electron gun configured to produce an electron beam;
an electron accelerator that is connected to the electron gun and is configured to accelerate the electron beam generated by the electron gun; and
a target module that is connected to the electron accelerator and is configured to generate radiation by being irradiated with the electron beam accelerated by the electron accelerator,
wherein the target module includes:
a housing having one open end and provided therein with a vacuum chamber;
an inner case having a cylindrical shape that protrudes toward the vacuum chamber to be installed inside the housing and including an electron beam inlet hole formed on a front portion thereof so as to allow the electron beam to be incident toward the housing;
a cover plate fixedly installed on the housing to cover the open one end of the housing;
a driving part including a rotating shaft installed through the cover plate and the inner case, and a motor configured to rotate the rotating shaft; and
a radiation generating target that is coupled to the rotating shaft to rotate in one direction and is configured to produce radiation of different energies as the incident electron beam passes therethrough.