公开(公告)号：USRE30947E

公开(公告)日：1982-05-25

申请号：US118686

申请日：1980-02-05

Applicant: Douglas P. Boyd

Inventor： Douglas P. Boyd

IPC: A61B6/03 ,  G01T1/29 ,  H01J47/06

CPC classification number: G01T1/2935 ,  A61B6/032 ,  A61B6/466 ,  H01J47/06

Abstract: A fan-shaped beam of penetrating radiation, such as X-ray or .gamma.-ray radiation, is directed through a slice of the body to be analyzed to a position sensitive detector for deriving a shadowgraph of transmission or absorption of the penetrating radiation by the body. A number of such shadowgraphs are obtained for different angles of rotation of the fan-shaped beam relative to the center of the slice being analyzed. The detected fan beam shadowgraph data is reordered into shadowgraph data corresponding to sets of parallel paths of radiation through the body. The reordered parallel path shadowgraph data is then convoluted in accordance with a 3-D reconstruction method by convolution in a computer to derive a 3-D reconstructed tomograph of the body under analysis. In a preferred embodiment, the position sensitive detector comprises a multiwire detector wherein the wires are arrayed parallel to the direction of the divergent penetrating rays to be detected. A focussed grid collimator is interposed between the body and the position sensitive detector for collimating the penetrating rays to be detected. The source of penetrating radiation is preferably a monochromatic source.

公开(公告)号：US3743840A

公开(公告)日：1973-07-03

申请号：US3743840D

申请日：1972-07-18

Applicant: ATOMIC ENERGY COMMISSION

Inventor： THIESSEN H ,  SOBOTTKA S ,  LEE D

IPC: G01T1/18 ,  H01J47/06

CPC classification number: H01J47/06

Abstract: A helical multiwire proportional chamber for detection of minimum ionizing particles consisting of an array of anode wires surrounded by a cathode wound in the form of a bifilar flattened helix nearly orthogonal to the anode wires and this chamber having an active area rectangular in shape, a frame comprising two pieces of plexiglass with a central cutout which forms the said active area, the anode wires being fastened to one of the frame pieces and the second frame piece being fastened to the first and the anode wires being connected in parallel to a positive high voltage supply and the cathode wire being connected to ground through a resistor.

Abstract translation: 一种用于检测最小电离粒子的螺旋多线比例室，包括由阴极缠绕的阳极线阵列组成的阴极线，所述阴极以与阳极线近似正交的双极扁平螺旋形式，该腔室具有矩形的有源区域，框架 包括两片具有形成所述有源区域的中心切口的有机玻璃，阳极线被紧固到一个框架件，并且第二框架件紧固到第一阳极引线并且正极连接到正高压 电源和阴极线通过电阻器接地。

公开(公告)号：US3383538A

公开(公告)日：1968-05-14

申请号：US51851765

申请日：1965-12-30

Applicant: NAVY USA

Inventor： BOWYER CHARLES S

IPC: H01J47/06

CPC classification number: H01J47/06

公开(公告)号：US3226197A

公开(公告)日：1965-12-28

申请号：US20970862

申请日：1962-07-13

Applicant: MARTIN SWEETS COMPANY INC

Inventor： LEWIS JAMES E

IPC: G01N31/12 ,  H01J47/06

CPC classification number: G01N31/12 ,  H01J47/06 ,  Y10T436/22 ,  Y10T436/23

公开(公告)号：US2965759A

公开(公告)日：1960-12-20

申请号：US63449657

申请日：1957-01-16

Applicant: EBERLINE INSTR DIVISION OF REY

Inventor： EBERLINE HOWARD C

IPC: H01J47/06

CPC classification number: H01J47/06

公开(公告)号：US2683221A

公开(公告)日：1954-07-06

申请号：US23118851

申请日：1951-06-12

Applicant: ATOMIC ENERGY COMMISSION

Inventor： GOSSICK BEN R

IPC: H01J47/06

CPC classification number: H01J47/06

公开(公告)号：US2499830A

公开(公告)日：1950-03-07

申请号：US71132146

申请日：1946-11-21

Applicant: MOLLOY EVERETT W

Inventor： MOLLOY EVERETT W

IPC: H01J47/06

CPC classification number: H01J47/06

公开(公告)号：US20170256378A1

公开(公告)日：2017-09-07

申请号：US15512518

申请日：2015-09-10

Applicant: FUJIKURA LTD.

Inventor： Daisuke Arai

IPC: H01J1/46 ,  H01J9/14 ,  H01J47/06

CPC classification number: H01J1/46 ,  G01T1/18 ,  H01J9/14 ,  H01J47/02 ,  H01J47/06

Abstract: An ion filter used for an electron multiplier includes an insulating substrate; a first conductive layer formed on one main surface of the substrate; and a second conductive layer formed on another main surface of the substrate. The ion filter has a plurality of through-holes formed along a thickness direction of the substrate. The one main surface of the substrate is disposed at a downstream side in a moving direction of electrons in a chamber of the electron multiplier and the other main surface of the substrate is disposed at an upstream side in the moving direction of electrons in the chamber of the electron multiplier. A first thickness of the first conductive layer formed on the one main surface of the substrate is thicker than a second thickness of the second conductive layer on the other main surface of the substrate.

公开(公告)号：US09519067B1

公开(公告)日：2016-12-13

申请号：US12886616

申请日：2010-09-21

Applicant: Hiroshi Kitaguchi ,  Takahiro Tadokoro ,  Katsunori Ueno ,  Hitoshi Kuwabara

Inventor： Hiroshi Kitaguchi ,  Takahiro Tadokoro ,  Katsunori Ueno ,  Hitoshi Kuwabara

IPC: G01T1/18 ,  G01T1/185 ,  G01T1/29 ,  H01J47/06 ,  H01J47/02

CPC classification number: G01M3/20 ,  G01N23/22 ,  G01N33/0027 ,  G01N33/0055 ,  G01T1/18 ,  G01T1/185 ,  G01T1/2935 ,  H01J47/02 ,  H01J47/06

Abstract: A radioactive gas measurement apparatus comprises: a radiation measurement cell comprising an inlet pipe and a discharge pipe, the radiation measurement cell introducing and discharging a radioactive gas containing a nuclide to be measured and a positron emitter nuclide through the inlet pipe and the discharge pipe; a radiation detector for measuring a radiation generated from the radioactive gas; and a radiation collimator allowing the radiation measurement cell to communicate with the radiation detector and setting a predetermined radiation measurement geometry condition between the radiation measurement cell and the radiation detector. Then, as the predetermined radiation measurement geometry condition, an inner wall area of the radiation measurement cell which the radiation detector views through the radiation collimator is set equal to or less than a half of a total inner wall area of the radiation measurement cell.

Abstract translation: 一种放射性气体测量装置，包括：放射线测量单元，包括入口管和排出管，所述辐射测量单元通过所述入口管和所述排放管引入并排出包含要测量的核素和正电子发射体核素的放射性气体; 用于测量由放射性气体产生的辐射的辐射检测器; 以及辐射准直器，其允许辐射测量单元与辐射检测器通信并且在辐射测量单元和辐射检测器之间设置预定的辐射测量几何状态。 然后，作为预定的辐射测量几何状态，放射线检测器通过辐射准直仪观察的辐射测量单元的内壁面积被设定为等于或小于辐射测量单元的总内壁面积的一半。

公开(公告)号：US09111737B2

公开(公告)日：2015-08-18

申请号：US13503211

申请日：2010-09-17

Applicant: Ioannis Giomataris ,  Rui De Oliveira

Inventor： Ioannis Giomataris ,  Rui De Oliveira

IPC: H05K13/00 ,  H01J47/06

CPC classification number: H01J47/065 ,  H01J47/06

Abstract: The invention relates to an improved method for fabricating the amplification gap of an avalanche particle detector in which two parallel electrodes are spaced apart by dielectric spacer elements. A foil including a bulk layer made of dielectric material sandwiched by two mutually parallel metallic electrodes is provided, and holes are formed in one of the metallic layers by means of photolithography. The amplification gap is then formed in the bulk layer by means of carefully controlled etching of the bulk material through the holes formed in one of the metallic layers. The invention not only provides a simplified fabrication process, but also results in a detector with enhanced spatial and energy resolution.

Abstract translation: 本发明涉及一种用于制造雪崩粒子检测器的放大间隙的改进方法，其中两个平行电极由电介质间隔元件隔开。 提供了包括由两个相互平行的金属电极夹持的电介质材料制成的体层的箔，并且通过光刻法在一个金属层中形成孔。 然后通过对通过在一个金属层中形成的孔形成的本体材料进行仔细控制的蚀刻，在体层中形成放大间隙。 本发明不仅提供了简化的制造工艺，而且还产生具有增强的空间和能量分辨率的检测器。