公开(公告)号：US2998522A

公开(公告)日：1961-08-29

申请号：US67933357

申请日：1957-08-21

Applicant: GEN DYNAMICS CORP

Inventor： MARTIN TROY C ,  GREEN OTTIS E

IPC: H01J47/06

CPC classification number: H01J47/06

公开(公告)号：US2882418A

公开(公告)日：1959-04-14

申请号：US44705454

申请日：1954-08-02

Applicant: PHILIPS CORP

Inventor： HENDEE CHARLES F ,  SAMUEL FINE

IPC: G01N23/223 ,  H01J47/06

CPC classification number: G01N23/223 ,  G01N2223/076 ,  H01J47/06

公开(公告)号：US2837678A

公开(公告)日：1958-06-03

申请号：US43783154

申请日：1954-06-18

Applicant: PHILIPS CORP

Inventor： HENDEE CHARLES F ,  SAMUEL FINE

IPC: H01J47/06

CPC classification number: H01J47/06

公开(公告)号：US2835839A

公开(公告)日：1958-05-20

申请号：US51234055

申请日：1955-05-31

Applicant: BORZIN JOHN J

Inventor： BORZIN JOHN J

IPC: H01J47/06

CPC classification number: H01J47/06

公开(公告)号：US2509700A

公开(公告)日：1950-05-30

申请号：US73017447

申请日：1947-02-21

Applicant: ATOMIC ENERGY COMMISSION

Inventor： SIMPSON JR JOHN A

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。

公开(公告)号：US5192868A

公开(公告)日：1993-03-09

申请号：US741543

申请日：1991-08-07

Applicant: John M. Dudley

Inventor： John M. Dudley

IPC: G01T1/185 ,  H01J47/06

CPC classification number: G01T1/185 ,  H01J47/06

Abstract: A proportional-type detector for the detection of low levels of radioactivity, such as alpha and beta particles generated by radioactive materials. In the preferred embodiment, this detector has a pancake-shaped cavity with a disk-shaped base and a cylindrical wall, with at least one anode member traversing the cavity. This anode member is maintained at an elevated potential so as to multiply and collect electrons formed within a counting gas within the cavity as a result of interaction between the radioactivity and a counter gas cavity. A perforated grid member, in one embodiment being a spiral coil, is substantially concentric with the anode member to provided a uniform electric field around the anode member. In the preferred embodiment, spacing between turns of the spiral grid is equal to or less than twice the radial distance between the anode member and the inside diameter of the grid. While an opening into the cavity can be covered with a window that is transparent to the radioactivity (the alpha and beta particles) for the retention of the counting gas, improved operation is obtained without a window for most applications.

Abstract translation: 用于检测低放射性的比例型检测器，例如放射性物质产生的α和β粒子。 在优选实施例中，该检测器具有带盘形基部和圆柱形壁的扁平形状的空腔，至少一个阳极件穿过空腔。 该阳极构件保持在升高的电位，以便由于放射性和反气体腔之间的相互作用而使在空腔内的计数气体内形成的电子倍增并收集。 在一个实施例中为螺旋线圈的多孔格栅构件与阳极构件基本上同心，以在阳极构件周围提供均匀的电场。 在优选实施例中，螺旋格栅的匝之间的间距等于或小于阳极构件与栅格内径之间的径向距离的两倍。 虽然通过对放射性（α和β颗粒）透明的窗口可以覆盖空腔的开口以保持计数气体，但在大多数应用中没有窗口可获得改进的操作。

公开(公告)号：US4707606A

公开(公告)日：1987-11-17

申请号：US658114

申请日：1984-10-05

Applicant: Manfred Keller

Inventor： Manfred Keller

IPC: H01J47/00 ,  H01J47/06 ,  G01T1/18

CPC classification number: H01J47/06 ,  H01J47/002

Abstract: Proportional counters for the detection and measurement of radioactive surface contaminations are provided with at least two flat window faces enclosing an angle and being formed by a thin foil spread or stretched by a framework including thin rods arranged along the inner edges of contacting window faces, to which rods the foil may be adhered. A perforated lattice or grid cage serves in particular to protect the thin window against any contact, the cage provides for a spacing of about double rod thickness between the framework and the controlled surface. Preferred is a polygonal and in particular hexagonal lattice whose grid wires or strips do not lie in the main scanning direction. Particularly convenient for checking pipelines are, for example, cylindrical measuring probes comprising window foils extending over and perhaps adhered to a circularly arranged frame of thin rods.

Abstract translation: 用于检测和测量放射性表面污染物的比例计数器设置有至少两个平坦的窗口面，其包围一角度，并且由薄片展开形成，薄的薄片由包括沿着接触窗面的内边缘布置的细棒的框架延伸或拉伸， 哪个棒可以粘附。 穿孔格栅或格栅笼特别用于保护薄窗不受任何接触，保持架在框架和受控表面之间提供约双重杆厚度的间隔。 优选的是多边形，特别是其网格线或条不位于主扫描方向的六边形格子。 检查管道特别方便的是例如圆柱形测量探针，其包括延伸并可能粘附到圆形的细棒框架上的窗口箔。