公开(公告)号：US20230358692A1

公开(公告)日：2023-11-09

申请号：US17922996

申请日：2021-05-06

申请人： ISTITUTO NAZIONALE DI FISICA NUCLEARE

发明人： Roberto BEDOGNI ,  Marco COSTA

IPC分类号： G01N23/05 ,  G21K1/02 ,  G01N23/207 ,  G01N23/09

CPC分类号： G01N23/05 ,  G21K1/025 ,  G01N23/2073 ,  G01N23/09 ,  G01N2223/316

摘要： A compact and small size multichannel collimator for neutrons with energies up to 50 keV is provided. The collimator has a multichannel structure composed of collimating channels (in air, vacuum or in the non-interacting atmosphere of Helium-4) alternating with “full” channels made with absorbent materials for slow neutrons. The geometry of the individual collimating and absorbing channels can be arbitrary. The geometry with channels of square section, such as to create a perfect checkerboard, is preferred from the point of view of ease of construction.

公开(公告)号：US20190094157A1

公开(公告)日：2019-03-28

申请号：US16112369

申请日：2018-08-24

申请人： SODERN

发明人： Adrien Cheminet

IPC分类号： G01N23/05 ,  G01V5/00 ,  G01N23/20066

CPC分类号： G01N23/05 ,  G01N23/046 ,  G01N23/20 ,  G01N23/20066 ,  G01N23/2208 ,  G01N23/222 ,  G01N2223/0745 ,  G01N2223/419 ,  G01V5/0016 ,  G01V5/0025 ,  G01V5/0069

摘要： Material analysis device (100) comprising a neutron generator (10) for emitting neutrons towards a material to be analysed in pulsed mode; an alpha particle detector (13) for locating the neutrons emitted in a given solid angle by detecting alpha particles associated with these neutrons; at least one gamma ray detector (14) for measuring energy of gamma photons generated by interaction of the neutrons emitted in the given solid angle with the material to be analysed; at least two Compton cameras (15), each for measuring energy of the gamma photons generated by interaction of the neutrons with the material to be analysed and for calculating an incidence cone of these gamma photos; and an electronic circuit adapted for three-dimensionally mapping the presence of at least one chemical element of interest in the material to be analysed based on data provided by the alpha particle detector (13), the gamma ray detector (14) and the Compton cameras (15).

公开(公告)号：US09316760B2

公开(公告)日：2016-04-19

申请号：US14312552

申请日：2014-06-23

申请人： Rapiscan Systems, Inc.

发明人： Joseph Bendahan

IPC分类号： G01V5/00 ,  G01N23/203 ,  H05G1/02 ,  G01N23/04 ,  G01N23/083 ,  G03B42/02 ,  G01N23/05

CPC分类号： G01V5/0066 ,  G01N23/04 ,  G01N23/05 ,  G01N23/083 ,  G01N23/203 ,  G01V5/0008 ,  G01V5/0016 ,  G01V5/0025 ,  G03B42/028 ,  H05G1/02

摘要： A system for scanning aircraft for concealed threats is provided. The system comprises a vehicle and a manipulator arm attached with a scanning head that can be maneuvered in multiple directions to completely scan an aircraft from the outside. The system uses transmission based X-ray detection, backscatter based X-ray detection or a combination thereof, in various embodiments. The system also includes gamma-ray and neutron detectors, for detection of nuclear and radioactive materials.

公开(公告)号：US20150168591A1

公开(公告)日：2015-06-18

申请号：US14108252

申请日：2013-12-16

申请人： SCHLUMBERGER TECHNOLOGY CORPORATION

发明人： SICCO BEEKMAN ,  CHRISTIAN STOLLER

IPC分类号： G01V5/10

CPC分类号： G01N23/05

摘要： A method is described for obtaining an accurate and precise value for radiation output of a radiation generator. Radiation is generated in the radiation generator, and the radiation output of the radiation generator is measured using a radiation monitoring device. An instantaneous inferred radiation output is determined from operating parameters of the radiation generator, and over a period of time a calibration factor between the measured and the instantaneous inferred radiation output is determined. The accurate and precise value for radiation output is determined from the instantaneous inferred radiation output and the determined calibration factor.

摘要翻译： 描述了一种用于获得辐射发生器的辐射输出的精确和精确值的方法。 在辐射发生器中产生辐射，并且使用辐射监测装置测量辐射发生器的辐射输出。 从辐射发生器的运行参数确定瞬时推断的辐射输出，并且在一段时间内确定测量的和瞬时推断的辐射输出之间的校准因子。 辐射输出的准确和精确的值由瞬时推断的辐射输出和确定的校准因子确定。

公开(公告)号：US20120207271A1

公开(公告)日：2012-08-16

申请号：US13142712

申请日：2010-12-28

申请人： Yigang Yang ,  Tiezhu Li ,  Qinjian Zhang ,  Yi Zhang ,  Yingkang Jin ,  Qinghao Chen ,  Yuanjing Li ,  Yinong Liu

发明人： Yigang Yang ,  Tiezhu Li ,  Qinjian Zhang ,  Yi Zhang ,  Yingkang Jin ,  Qinghao Chen ,  Yuanjing Li ,  Yinong Liu

IPC分类号： G01N23/06

CPC分类号： G01V5/0016 ,  G01N23/046 ,  G01N23/05 ,  G01N2223/419 ,  G01V5/0025

摘要： The present invention discloses an article inspection device, comprising: an x-ray machine, a collimation unit, a transmission detector array and a scattering detector array. The scattering detector array comprising a plurality of same scattering detector modules arranged in a matrix of i-rows and j-columns. A transmission cross section of the article transmitted by the x-rays is divided into a plurality of same sub-regions arranged in a matrix of i-rows and j-columns. The plurality of scattering detector modules arranged in i-rows and j-columns correspond to the plurality of sub-regions arranged in i-rows and j-columns one by one for detecting pair production effect annihilation photons and Compton-effect scattering photons from the respective sub-regions. Obtaining atomic numbers of the respective sub-regions based on a ratio of the pair production effect annihilation photon count to the Compton-effect scattering photon count, so as to form a three-dimensional image of the article. In addition, the present invention further discloses an article inspection method.

摘要翻译： 本发明公开了一种物品检查装置，包括：x射线机，准直单元，透射检测器阵列和散射检测器阵列。 该散射检测器阵列包括以i行和j列的矩阵排列的多个相同的散射检测器模块。 通过X射线透射的物品的透射截面被划分成以i行和j列的矩阵排列的多个相同的子区域。 布置在i行和j列中的多个散射检测器模块对应于一排一列地排列在i行和j列中的多个子区域，用于检测来自该对象的生成效应湮灭光子和康普顿效应散射光子 各分区域。 基于对生产效应湮灭光子计数与康普顿效应散射光子计数的比率来获得各个子区域的原子序数，以形成物品的三维图像。 此外，本发明还公开了一种物品检查方法。

公开(公告)号：US07120998B2

公开(公告)日：2006-10-17

申请号：US10922368

申请日：2004-08-20

申请人： Nicholas LeCursi ,  Lawrence J. LeGore ,  Robert H. Jackson, III ,  C. Bronson H. Crothers ,  Peter H. Kleban ,  Brian G. Frederick

发明人： Nicholas LeCursi ,  Lawrence J. LeGore ,  Robert H. Jackson, III ,  C. Bronson H. Crothers ,  Peter H. Kleban ,  Brian G. Frederick

IPC分类号： H01R43/00

CPC分类号： G21K1/087 ,  G01N23/05 ,  H01J49/0018 ,  H01J49/0031 ,  H01J49/061 ,  H01J49/446 ,  H01L2924/0002 ,  Y10T29/4902 ,  Y10T29/49082 ,  Y10T29/49117 ,  Y10T29/49155 ,  Y10T29/49156 ,  H01L2924/00

摘要： A technique for providing a grid for a gate such as utilized in gating a stream of ions or other particles in a spectrometer instrument. The grid of wires may, for example, be a so-called Bradbury-Nielson Gate that consists of a set of two electrically isolated sets of equally spaced wires that lie substantially in the same plane and alternate in potential. The method utilized to provide is to first fabricate a frame of an insulating substrate having a hole and depositing metal film patterns such that conductive portions are formed on either side of the hole. Conductive portions on either side form a series of terminating pads on the portion of the substrate closest to the hole and a bus bar. Grid wires are then formed by stretching a section of wire with desired constant tension across the hole and bonding the ends of the wire to a respective one of the pads on one side and bus bar on the other side. The method provides a rapid, inexpensive way to fabricate such modulating devices.

公开(公告)号：US5852301A

公开(公告)日：1998-12-22

申请号：US768398

申请日：1996-12-18

申请人： Nobuo Niimura ,  Yuuko Karasawa ,  Kenji Takahashi ,  Hiroki Saito

发明人： Nobuo Niimura ,  Yuuko Karasawa ,  Kenji Takahashi ,  Hiroki Saito

IPC分类号： G01N21/62 ,  G01N21/88 ,  G01N21/89 ,  G01N21/954 ,  G01N23/04 ,  G01N23/05 ,  G01T3/00 ,  G03B42/02 ,  G21K4/00 ,  G03B42/08

CPC分类号： G01N23/05 ,  G01N23/04 ,  G01T3/00

摘要： Stimulable phosphor sheets are superposed one upon another. Each stimulable phosphor sheet is provided with a layer of a substance, which absorbs neutrons and emits secondary particles, and a layer of a stimulable phosphor, which can store energy from the secondary particles. The stimulable phosphor sheets are exposed to a neutron beam carrying image information, and neutron images are thereby stored on the stimulable phosphor sheets. Image signals representing the neutron images stored on the stimulable phosphor sheets are then obtained. The image signal components of the image signals are then added to each other, which represent corresponding picture elements in the neutron images. An image signal representing the neutron images stored on the stimulable phosphor sheets is thereby obtained.

摘要翻译： 可刺激的磷光体片彼此重叠。 每个可激发的荧光体片材都设置有吸收中子并发射二次粒子的物质层，以及可以存储来自二次粒子的能量的可刺激的磷光体层。 可刺激的荧光体片暴露于携带图像信息的中子束，并且因此将中子图像存储在可刺激的荧光片上。 然后获得表示存储在可刺激的磷光体片上的中子图像的图像信号。 然后将图像信号的图像信号分量彼此相加，其表示中子图像中的相应图像元素。 从而获得表示存储在可刺激的磷光体片上的中子图像的图像信号。

公开(公告)号：US5703371A

公开(公告)日：1997-12-30

申请号：US689565

申请日：1996-08-12

申请人： David Michael Farkas ,  Daniel Reese Lutz

发明人： David Michael Farkas ,  Daniel Reese Lutz

IPC分类号： G01N23/05 ,  G01N23/204 ,  G01N23/202

CPC分类号： G01N23/05

摘要： A neutron radiography camera operates in cooperation with a neutron beam source for determining hydrogen content of irradiated BWR fuel elements. The camera implements the method using a notched neutron spectrum filter to determine the hydrogen content. The camera is specifically configured to take advantage of the tubular geometry of a nuclear fuel rod. Incident neutron beam ports are formed in a base unit that receives an incident filtered neutron beam. The ports aim the neutron beam at a periphery of the BWR fuel elements, which in the context of nuclear fuel rods includes zirconium alloy cladding. Collision of the neutrons with hydrogen in the cladding lowers their energy and scatters them at preferential angles. Scatter cavities defining scattered neutron paths are formed in the base unit, and absorber plates are disposed of terminal ends of the scatter cavities. The absorber plates become activated by resonance absorption from the neutrons scattered by hydrogen in the target fuel elements. The hydrogen content can be determined from the activated absorber plates.

摘要翻译： 中子射线摄影照相机与中子束源协同工作，以确定照射的BWR燃料元件的氢含量。 相机使用缺口中子频谱滤波器来实现该方法来确定氢含量。 相机被特别地配置成利用核燃料棒的管状几何形状。 事件中子束端口形成在接收入射过滤的中子束的基本单元中。 这些端口将中子束瞄准BWR燃料元件的周边，在核燃料棒的上下文中包括锆合金包层。 包层中的中子与氢的碰撞降低了它们的能量，并以优先的角度散射它​​们。 形成分散中子路径的散射腔形成在基座单元中，并且吸收板设置在散射空腔的末端。 吸收板通过来自目标燃料元件中由氢分散的中子的共振吸收而激活。 可以从活化的吸收板确定氢含量。

公开(公告)号：US5635727A

公开(公告)日：1997-06-03

申请号：US492228

申请日：1995-06-19

申请人： Nobuo Niimura ,  Yuuko Karasawa ,  Kenji Takahashi ,  Hiroki Saito

发明人： Nobuo Niimura ,  Yuuko Karasawa ,  Kenji Takahashi ,  Hiroki Saito

IPC分类号： G01N21/62 ,  G01N21/88 ,  G01N21/89 ,  G01N21/954 ,  G01N23/04 ,  G01N23/05 ,  G01T3/00 ,  G03B42/02 ,  G21K4/00 ,  G01N23/09

CPC分类号： G01N23/05 ,  G01N23/04 ,  G01T3/00

摘要： Stimulable phosphor sheets are superposed one upon another. Each stimulable phosphor sheet is provided with a first layer of a substance, which absorbs neutrons and emits secondary particles, and a second layer of a stimulable phosphor, which can store energy from the secondary particles. The stimulable phosphor sheets are exposed to a neutron beam carrying image information, and neutron images are thereby stored on the stimulable phosphor sheets. Image signals representing the neutron images stored on the stimulable phosphor sheets are then obtained. The image signal components of the image signals are then added to each other, which represent corresponding picture elements in the neutron images. An image signal representing the neutron images stored on the stimulable phosphor sheets is thereby obtained. Alternatively, at least one stimulable phosphor sheet for absorbing neutrons, emitting particles, and storing energy of these particles and, a second phosphor sheet for detecting and storing energy from .gamma.-rays, are superposed and exposed to a neutron beam carrying image information. After this exposure, images become stored on each layer of the phosphor sheets. The image signals representing the images stored on each layer are then obtained. The image signal stored in the .gamma.-ray detecting layer is subtracted from the image signal stored on the neutron detecting layer to obtain the neutron image stored on the stimulable phosphor sheets.

摘要翻译： 可刺激的磷光体片彼此重叠。 每个可激发的荧光体片材都设置有吸收中子并发射二次颗粒的物质的第一层，以及可以存储来自二次颗粒的能量的可刺激磷光体的第二层。 可刺激的荧光体片暴露于携带图像信息的中子束，并且因此将中子图像存储在可刺激的荧光片上。 然后获得表示存储在可刺激的磷光体片上的中子图像的图像信号。 然后将图像信号的图像信号分量彼此相加，其表示中子图像中的相应图像元素。 从而获得表示存储在可刺激的磷光体片上的中子图像的图像信号。 或者，用于吸收中子，发射粒子和储存这些粒子的能量的至少一个可刺激的荧光体片，以及用于从γ射线检测和存储能量的第二荧光片叠加并暴露于携带图像信息的中子束。 在曝光之后，图像被存储在每层荧光片上。 然后获得表示存储在每个层上的图像的图像信号。 存储在伽马射线检测层中的图像信号从存储在中子检测层上的图像信号中减去，以获得存储在可刺激的荧光体片上的中子图像。

公开(公告)号：US4761558A

公开(公告)日：1988-08-02

申请号：US912929

申请日：1986-09-26

申请人： Wolfgang Schulz

发明人： Wolfgang Schulz

IPC分类号： G01N23/04 ,  G01N23/05 ,  G01T5/02 ,  G02B27/02 ,  G03B42/00 ,  G01T3/00

CPC分类号： G01N23/05 ,  G01T5/02

摘要： An apparatus for viewing a foil irradiated in the course of neutron radiography, the foil having nuclear tracks being visible after etching under the action of light, includes a completely enclosed housing having a first surface with an opening formed therein for receiving an etched foil, a second surface opposite the opening, a black coating disposed on the second surface, and at least one light source disposed between the black coated second surface and the opening for transmitting light rays striking the foil in the opening at an angle deviating from the normal.

摘要翻译： 一种用于观察在中子射线照相过程中照射的箔的装置，在光作用下蚀刻后具有核轨迹的箔包括具有第一表面的完全封闭的壳体，其中形成有用于接收蚀刻箔的开口， 与开口相对的第二表面，设置在第二表面上的黑色涂层，以及设置在黑色涂覆的第二表面和开口之间的至少一个光源，用于以与偏离法线的角度相反的方式透射在开口中撞击箔片的光线。