公开(公告)号：US20240295511A1

公开(公告)日：2024-09-05

申请号：US18648861

申请日：2024-04-29

Applicant: RIKEN

Inventor： Yasuo WAKABAYASHI ,  Yoshie OTAKE ,  Massato TAKAMURA ,  Yujiro IKEDA

IPC: G01N23/222 ,  G01N33/38

CPC classification number: G01N23/222 ,  G01N33/383 ,  G01N2223/0745 ,  G01N2223/1013 ,  G01N2223/106

Abstract: A non-destructive inspection device includes a neutron generation portion, a neutron shield portion, a gamma ray detector, and a gamma ray shield portion. The neutron generation portion emits neutrons spontaneously, or emits neutrons by DD nuclear fusion reaction or DT nuclear fusion reaction. The neutron shield portion is covers the neutron generation portion from at least an area around the neutron generation portion and thereby shields the neutrons at the area, and allows the neutrons to be emitted to a front side of the neutron generation portion. The gamma ray detector detects gamma rays generated in an inspection object on a front side of the neutron generation portion. The gamma rays are generated by the neutrons incident on the inspection object. The neutron shield portion, the gamma ray shield portion, and the gamma ray detector are arranged in this order in alignment with each other in a lateral direction.

公开(公告)号：US20210131981A1

公开(公告)日：2021-05-06

申请号：US17041963

申请日：2018-09-27

Applicant: Topcon Corporation ,  RIKEN

Inventor： Yuichi YOSHIMURA ,  Maki MIZUTA ,  Hideyuki SUNAGA ,  Yoshie OTAKE

IPC: G01N23/05 ,  G01N33/38 ,  G01N23/02 ,  G01N23/09

Abstract: The non-destructive inspection method includes: a water absorbing or drying step of changing a water-content state of a test piece; a transmission image capturing step of irradiating, with a radiation, the test piece absorbed water or dried for a predetermined time in the water absorbing or drying step and capturing a transmission image created by visualizing the radiation transmitted through the test piece; and an evaluation step of evaluating the test piece on the basis of the water-content state of the test piece determined from the transmission image captured in the transmission image capturing step.

公开(公告)号：US20210033542A1

公开(公告)日：2021-02-04

申请号：US17066593

申请日：2020-10-09

Applicant: RIKEN

Inventor： Yasuo WAKABAYASHI ,  Yoshie OTAKE ,  Yujiro IKEDA

IPC: G01N23/02 ,  G01T1/16

Abstract: A nondestructive inspection apparatus makes a neutron beam incident on an inspection target, detects a specific gamma ray deriving from a target component in the inspection target, among gamma rays generated by the neutron beam, and determines a depth at which the target component exists, based on a result of the detecting. The nondestructive inspection apparatus includes a neutron source that emits a neutron beam to a surface of the inspection target, a gamma ray detection device that detects, as detection intensities, intensities of a plurality of types of specific gamma rays whose energy differs from each other, and a ratio calculation unit that determines a ratio between the detection intensities of a plurality of types of the specific gamma rays.

公开(公告)号：US20220082514A1

公开(公告)日：2022-03-17

申请号：US17310856

申请日：2020-02-27

Applicant: Topcon Corporation ,  RIKEN

Inventor： Shigenori NAGANO ,  Satoru ISHIGURO ,  Yoshie OTAKE ,  Hideyuki SUNAGA ,  Yuichi YOSHIMURA ,  Koji IKADO

IPC: G01N23/204 ,  G01N23/18

Abstract: A non-destructive inspection system includes: a neutron emission unit 12 capable of emitting neutrons pulsed; a neutron detector capable of detecting the neutrons emitted from the neutron emission unit and penetrating through an inspection object; a storage unit storing attenuation information indicating a relationship between a material of the inspection object and attenuation of the neutrons; and a calculation unit capable of calculating distance information indicating a position of a specific portion in the inspection object in accordance with time change information which is information on a change over time in an amount of the neutrons detected by the neutron detector. The calculation unit is capable of generating information related to an amount of the specific portion from information based on the amount of the neutrons according to the time change information, using the distance information and the attenuation information.

公开(公告)号：US20220003690A1

公开(公告)日：2022-01-06

申请号：US17280158

申请日：2019-09-25

Applicant: Topcon Corporation ,  RIKEN

Inventor： Shigenori NAGANO ,  Hanako AIKOH ,  Yoshie OTAKE ,  Yuichi YOSHIMURA ,  Hideyuki SUNAGA

IPC: G01N23/05 ,  G01N23/20008 ,  G01N23/204 ,  G01T3/00 ,  G01T7/00

Abstract: A non-destructive inspection system 1 includes a neutron detecting unit 4 and an arithmetic unit 60. The neutron detecting unit 4 includes a collimator 30 and a neutron detector 20 integrated together. The collimator 30 has a wall defining a through passage P. The wall is made from a material that absorbs neutrons produced via an inspection object. The neutron detector 20 is capable of detecting neutrons that have passed through the collimator 30. The arithmetic unit 60 generates information on a position and composition of the inspection object, based on information on the neutrons detected by the neutron detector 20, positional information indicating the position of the neutron detecting unit 4, and posture information indicating the posture of the neutron detecting unit 4. The positional information and the posture information are detected by a position and posture detecting unit 5.

公开(公告)号：US20210396688A1

公开(公告)日：2021-12-23

申请号：US17279537

申请日：2019-09-25

Applicant: Topcon Corporation ,  RIKEN

Inventor： Shigenori NAGANO ,  Hisashi TSUKADA ,  Yoshie OTAKE ,  Koji IKADO ,  Yuichi YOSHIMURA ,  Hideyuki SUNAGA

IPC: G01N23/20008 ,  G01N23/204 ,  G01N23/09 ,  H05H3/04 ,  H05H6/00 ,  H05H9/00 ,  H05H7/04

Abstract: A non-destructive inspection system 1 includes a neutron radiation source 3 capable of emitting neutrons N, and a neutron detector 14 capable of detecting neutrons Nb produced via an inspection object 6a among neutrons N emitted from the neutron radiation source 3. The neutron radiation source 3 includes a linear accelerator 11 capable of emitting charged particles P accelerated; a first magnet section 12 including magnets 12a and 12b facing each other, the magnets 12a and 12b being capable of deflecting the charged particles P in a direction substantially perpendicular to a direction of emission of the charged particles P from the linear accelerator 11; and a target section 13 capable of producing neutrons N by being irradiated with the charged particles P that have passed through the first magnet section 12.

公开(公告)号：US20240272102A1

公开(公告)日：2024-08-15

申请号：US18563557

申请日：2022-05-24

Applicant: TOPCON CORPORATION ,  RIKEN

Inventor： Shigenori NAGANO ,  Satoshi YANOBE ,  Akira YAJIMA ,  Hanako AIKOH ,  Satoru ISHIGURO ,  Yoshie OTAKE ,  Yasuo WAKABAYASHI ,  Masato TAKAMURA

IPC: G01N23/222 ,  G01T1/02 ,  G01T7/12

CPC classification number: G01N23/222 ,  G01T1/02 ,  G01T7/12 ,  G01N2223/0745 ,  G01N2223/631

Abstract: This non-destructive inspection system 1 has a non-destructive inspection device 2 and a management device 3. The non-destructive inspection device 2 is provided with: a neutron emission unit 10 capable of emitting a neutron beam; a gamma ray detection unit 20 capable of detecting gamma rays; a device casing 30 covering the neutron emission unit 10 and the gamma ray detection unit 20, an opening 30a being formed in the device casing 30; an outer shutter 31 that opens/closes the opening 30a; dose monitors 51, 52, 53 provided to the device casing 30, the dose monitors 51, 52, 53 detecting the radiation dose; a device communication unit 56 capable of transmitting device information including the detected radiation dose to the management device 3, and capable of receiving inspection permission information from the management device 3; and a device control unit 40 that, when the inspection permission information is acquired, opens the outer shutter 31 and enables emission of a neutron beam from the neutron emission unit 10.

公开(公告)号：US20240192153A1

公开(公告)日：2024-06-13

申请号：US18553264

申请日：2022-03-31

Applicant: TOPCON CORPORATION ,  RIKEN

Inventor： Shigenori NAGANO ,  Satoshi YANOBE ,  Akira YAJIMA ,  Hanako AIKOH ,  Satoru ISHIGURO ,  Yoshie OTAKE ,  Yasuo WAKABAYASHI ,  Masato TAKAMURA

IPC: G01N23/222 ,  G01N23/204 ,  G01N23/2206

CPC classification number: G01N23/222 ,  G01N23/204 ,  G01N23/2206 ,  G01N2223/0745

Abstract: A nondestructive inspection system 1 is provided with: a neutron radiation unit 10 capable of radiating a first neutron dose of neutrons; a neutron detection unit 20 capable of detecting a second neutron dose of neutrons scattered inside an inspection object A upon radiation of neutrons from the neutron radiation unit 10; a gamma ray detection unit 30 capable of detecting a gamma ray dose released from the inspection object A upon radiation of neutrons from the neutron radiation unit 10; and an analysis unit 50 that calculates the contained amount of a predetermined substance on the basis of the gamma ray dose and corrects the contained amount of the predetermined substance on the basis of the first neutron dose and the second neutron dose.

公开(公告)号：US20210168925A1

公开(公告)日：2021-06-03

申请号：US17262886

申请日：2019-08-01

Applicant: RIKEN

Inventor： Tomohiro KOBAYASHI ,  Yoshie OTAKE ,  Hideyuki SUNAGA ,  Xiaobo LI

IPC: H05H3/06 ,  G21G4/02 ,  G21K5/08

Abstract: A target structure includes a target and a cooling portion. The target generates neutrons by being irradiated with a charged particle beam. The cooling portion includes a front surface and a back surface that face to sides opposite to each other. The target is joined directly or indirectly to the front surface. A flow path for flowing of cooling liquid including hydrogen elements is formed in the cooling portion. When viewed in a thickness direction of the cooling portion from the front surface to the back surface, the flow path is positioned off a center portion of the target.

公开(公告)号：US20250027890A1

公开(公告)日：2025-01-23

申请号：US18712873

申请日：2022-10-25

Applicant: RIKEN

Inventor： Kunihiro FUJITA ,  Takaoki TAKANASHI ,  Chihiro IWAMOTO ,  Yoshie OTAKE

IPC: G01N23/05

Abstract: An observation device includes a neutron emission device, a detection device, and a data processing device. The neutron emission device emits neutrons to an inspection object. The detection device detects exit neutrons from the inspection object at one set of detection positions in a peripheral direction around the inspection object, outside the inspection object, and measures the number of the detected exit neutrons for each of the detection positions. The data processing device generates reconstructed cross-sectional data by performing reconstruction processing based on the number of the detected exit neutrons at each of the one set of detection positions. The reconstructed cross-sectional data represent a two-dimensional distribution of a neutron reaction rate in an imaginary cross-section of the inspection object.