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    • 2. 发明授权
    • Fiber optic ionizing radiation detector
    • 光纤电离辐射探测器
    • US5323011A
    • 1994-06-21
    • US106669
    • 1993-08-16
    • Joseph J. SuterJay C. Poret
    • Joseph J. SuterJay C. Poret
    • G01T1/06G01T1/00
    • G01T1/06
    • An ionizing radiation detector employs optical fibers as the medium for sensing ionizing radiation emitted by a radioactive source. Light in the infrared region is pumped continuously through an optical fiber located in an area or region where the unintentional discharge of ionizing radiation may be expected, so that such emission is detected the moment it occurs. The source of optical light emits a constant output within a specific wavelength band which changes only when irradiation of the fibers by ionizing radiation causes their internal color centers to change. The output of the fibers is optically coupled to a photomultiplier via a light pipe. A single light source, detector, and associated electronics complete the system. A hand-held unit unique for remote sensing may house these components. Due to safety conditions, these components are located at a point remote from the position liable to become under the influence of the radiation exposure field. Annealing of that portion of the optical fiber influenced by irradiation field restores the exposed portion of the optical fiber to substantially its previous level of sensitivity thereby reversibly establishing the fiber optic for any subsequent exposure. In response to particle bombardment from a cobalt-60 source, the detector reacts to the energy remaining after passage of the beam through a shielding enclosure, thereby giving a reliable indication of the shielding effectiveness of the enclosure.
    • 电离辐射检测器使用光纤作为用于感测由放射源发射的电离辐射的介质。 红外区域中的光被连续泵浦,位于可能预期电离辐射的无意放电的区域或区域中的光纤,从而在其发生的时刻检测到这种发射。 光源在特定波长带内发射恒定的输出,只有当通过电离辐射照射纤维才能使其内部色心发生变化时才会发生变化。 纤维的输出通过光管光学耦合到光电倍增管。 单个光源,检测器和相关电子装置完成系统。 遥控器独有的手持单元可以容纳这些组件。 由于安全条件,这些部件位于远离易受辐射照射场影响的位置的位置。 受照射场影响的光纤的该部分的退火将光纤的暴露部分恢复到基本上其先前的灵敏度水平,从而可逆地建立用于随后曝光的光纤。 响应于来自钴-60源的粒子轰击,检测器对通过屏蔽外壳的光束通过后剩余的能量进行反应,从而给出了外壳屏蔽效能的可靠指示。