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711 records (took 0.018 seconds)

    101.
    实用新型
    失效

    公开(公告)号：JPS6320356U

    公开(公告)日：1988-02-10

    申请号：JP11283286

    申请日：1986-07-24

    IPC: G01T1/18 ,  H01J47/08

    GM COUNTER
    102.
    发明专利
    GM COUNTER 失效

    公开(公告)号：JPS61168854A

    公开(公告)日：1986-07-30

    申请号：JP715685

    申请日：1985-01-18

    Applicant: FUJI ELECTRIC CO LTD

    Inventor： MATSUDA MIKIHIKO

    IPC: H01J47/08

    Abstract: PURPOSE:To improve the counting efficiency and reduce the effect of fluctuation of applied voltage, by sealing a specific quantity of nitrogen gas in a GM counter whose extinguishing gas is made of a haloid gas. CONSTITUTION:About 4-40% in volume of nitrogen gas is sealed other than the counter gas and extinguishing gas. In the GM counter of such composition, the more the adding quantity of nitrogen gas, the more is improved the counting efficiency, but on the other hand, each plateau moves to the higher applied voltage side, as well as the declination of the plateau is getting larger, that is, the counting result of the counter has a tendency to get the effect of fluctuation of the applied voltage. The percentage of the adding nitrogen gas may be any value as far as it is between about 4-40%. By adding this quantity, a counter will take advantages of a good haloid type counter such as a long life and a low applied voltage, and moreover, the counting efficiency is improved as well as the effect of fluctuation of applied voltage is well reduced.

    CURRENT DETECTION CIRCUIT OF GEIGER MULLER COUNTER
    103.
    发明专利
    CURRENT DETECTION CIRCUIT OF GEIGER MULLER COUNTER 失效

    公开(公告)号：JPS60169787A

    公开(公告)日：1985-09-03

    申请号：JP2482284

    申请日：1984-02-13

    Applicant: MATSUSHITA ELECTRIC IND CO LTD

    Inventor： TAKAMUKAI KIYOKAZU

    IPC: H01J47/08 ,  G01T1/18

    Abstract: PURPOSE:To detect the current of a Geiger Muller counter (GM counter) by a simple structure, by providing a transformer used in both of an oscillation coil and a boosting transformer as a high voltage generation circuit for applying high voltage to the GM counter to convert the frequency thereof to a voltage value. CONSTITUTION:As a high voltage generation circuit for applying high voltage to a GM counter (a), a transformer T1 used in both an oscillation coil and a boosting transformer is provided and high DC voltage (high voltagle) is obtained from the high voltage current generated in a secondary side through diodes D1, D2 and condensers C2, C3. This high voltage is applied to the GM counter (a) through a resistor R2 and a current is flowed into the GM counter (a) from the high voltage terminal thereof. Therefore, the current increases as the dose ratio of radioactive rays allowed to irradiate the GM counter (a) becomes high FFTQ2 guides oscillation frequency for transmitting the current of the GM counter (a) to both terminals of a resistor R4 and this oscillation frequency is converted to voltage VC through a resistor R5 and a condenser C5. By this method, voltage showing the relative value of the current of the GM counter (a) and voltage of a reference voltage oscillation (b) are compared by a comparator (c) to make it possible to detect the current of the GM counter.

    105.
    实用新型
    失效

    公开(公告)号：JPS5542137U

    公开(公告)日：1980-03-18

    申请号：JP12486178

    申请日：1978-09-13

    IPC: H01J47/08 ,  G01T1/18

    106.
    实用新型
    失效

    公开(公告)号：JPS5427674U

    公开(公告)日：1979-02-23

    申请号：JP9985377

    申请日：1977-07-25

    IPC: H01J47/08 ,  H01J39/30

    109.
    发明专利
    失效

    公开(公告)号：JPS501229B1

    公开(公告)日：1975-01-16

    申请号：JP780870

    申请日：1970-01-30

    IPC: G01T1/18 ,  H01J47/08 ,  H01J39/30

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