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    Spark chamber radiation-detecting device
    1.
    发明授权
    Spark chamber radiation-detecting device 失效
    火炬探测器辐射检测装置

    公开(公告)号：US3717766A

    公开(公告)日：1973-02-20

    申请号：US3717766D

    申请日：1970-10-22

    Applicant: COMMISSARIAT ENERGIE ATOMIQUE

    Inventor： ALLARD G ,  LANSIART A

    IPC: H01J47/14 ,  A61B6/00 ,  G01T5/12 ,  H01J47/10 ,  G01T1/18

    CPC classification number: H01J47/10 ,  A61B6/4258

    Abstract: A DEVICE FOR DETECTING AND VISUALIZING THE SPATIAL DISTRIBUTION OF RADIATION COMPRISES THREE PARALLEL ELECTRODES DISPOSED WITHIN AN ENCLOSURE WHICH CONTAINS AN IONIZABLE GAS MIXTURE AND CONSISTING OF A GRID BETWEEN A CATHODE WHICH IS TRANSPARENT TO SAID RADIATION AND AN ANODE. THE GRID DEFINES WITH THE CATHODE A DETECTION SPACE IN WHICH THE INCIDENT RADIATION CAUSES IONIZATION OF THE GAS MIXTURE AND DEFINES WITH THE ANODE A SPACE FOR THE MULTIPLICATION OF ELECTRONS WHICH ARE PRODUCED IN THE DETECTION SPACE AND PASS THROUGH THE GRID, THEREBY INITIATING THE PRODUCTION OF SPARKS. THE DETECTING DEVICE FURTHER COMPRISES AN EXTERNAL CIRCUIT WHICH PROVIDES A CONNECTION BETWEEN THE ANODE AND THE GRID AND INCLUDES MEANS WHICH ARE TRIGGERED BY THE SPARKS PRODUCED WITHIN THE MULTIPLICATION SPACE IN ORDER TO SHORT-CIRCUIT SAID MULTIPLICATION SPACE TEMPORARILY AT THE TIME OF APPEARANCE OF EACH SPARK. THE ANODE IS ESSENTIALLY PROVIDED WITH TWO CONDUCTIVE COATINGS WHICH ARE ELECTRICALLY CONNECTED TO EACH OTHER RESPECTIVELY ON THE TWO FACES OF AN OPTICALLY TRANSPARENT SUPPORT PLATE. ONE OF THE TWO COATINGS HAS HIGH SURFACE RESISTANCE AND LIMITS THE ELECTRON MULTIPLICATION SPACE WHILST THE OTHER COATING HAS LOW SURFACE RESISTANCE.

    D R A W I N G

    3.
    发明专利
    未知

    公开(公告)号：SE312383B

    公开(公告)日：1969-07-14

    申请号：SE704664

    申请日：1964-06-10

    Applicant: COMMISSARIAT ENERGIE ATOMIQUE

    Inventor： LEQUAIS J ,  LANSIART A ,  LELOUP J

    IPC: G01T5/00 ,  H01J47/10 ,  G01T1/00 ,  H01J39/28

    Abstract: 1,028,834. Recording tracks of particles. COMMISSARIAT A L'ENERGIE ATOMIQUE. June 2, 1964 [June 11, 1963], No. 22816/64. Heading G6P. In a device for indicating the distribution of a radio-active emitter over a given surface, a spark is formed at each point where radiation is incident on the indicator. The device consists of a vessel containing a low-pressure gas and a D.C. energized cathode and anode. A radiation particle enters the vessel, passing through the cathode, and causes electron multiplication in the gas. The D.C. voltage is so chosen that no spark is formed at this stage. An external circuit detects the electron pulse at the anode and causes an impulsive negative potential to be applied to the cathode, thus forming a spark at the point of impact of the radiation on the cathode. The metal cathode may be replaced by a scintillator and a photocathode.

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