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    • 1. 发明公开
    • Scintillation detector
    • Szintillationsdetektor
    • EP0971243A1
    • 2000-01-12
    • EP99113069.1
    • 1999-07-06
    • Saint-Gobain Industrial Ceramics, Inc.
    • Sekela, William D.Grodsinsky, Carlos
    • G01T1/20G01T1/202G01V5/04
    • G01V5/04G01T1/202
    • A scintillation detector (10) includes a scintillation crystal (16) directly coupled to a photomultiplier tube (PMT) (18). The crystal/PMT subassembly is attached to a voltage divider (24) and the entire device is hermetically sealed in a stainless steel outer case (12). Conductors (82) are passed through the hermetic package from the voltage divider (24) via a high temperature metal to ceramic pass-through. The crystal (16) and PMT (18) are longitudinally loaded within the outer case by springs (140, 152) in order to minimize vibrations in the crystal and PMT. A thermoplastic support sleeve (26) circumscribes the crystal (16) and the PMT (18) to protect the crystal (16) and PMT (18) from excessive longitudinal loading. Preferably, the support sleeve (26) and the crystal (16) have similar coefficients of thermal expansion so that the crystal (16) and the support sleeve (26) experience similar dimensional changes due to temperature fluctuations, allowing the support sleeve (26) to best maintain its stress-limiting function as temperature within the detector changes.
    • 闪烁检测器(10)包括直接耦合到光电倍增管(PMT)(18)的闪烁晶体(16)。 晶体/ PMT子组件连接到分压器(24),并且整个装置气密地密封在不锈钢外壳(12)中。 导体(82)通过高温金属通过密封封装从分压器(24)通过陶瓷穿通。 晶体(16)和PMT(18)通过弹簧(140,152)纵向地装载在外壳内,以便最小化晶体和PMT中的振动。 热塑性支撑套筒(26)围绕晶体(16)和PMT(18),以保护晶体(16)和PMT(18)免受过度的纵向载荷。 优选地,支撑套筒(26)和晶体(16)具有类似的热膨胀系数,使得晶体(16)和支撑套筒(26)由于温度波动而经历类似的尺寸变化,允许支撑套筒(26) 以最好地保持其在检测器内的温度变化时的应力限制功能。
    • 4. 发明公开
    • Scintillation detector with sleeved crystal boot
    • Szintillationsdetektor mit einerKristallabdeckmäntel
    • EP0831337A1
    • 1998-03-25
    • EP97202560.5
    • 1997-08-20
    • Saint-Gobain Industrial Ceramics, Inc.
    • Linden, Chris W.Sekela, William D.Lutz, Jeffrey R.
    • G01T1/20G01V5/04
    • G01V5/04G01T1/2002
    • A scintillation detector (10) includes a scintillation crystal (14) and a shock absorbing member (76) circumscribing the crystal (14). A sleeve (98) circumscribes the shock absorbing member (76) which, in turn, is circumscribed by a housing (12). The sleeve (98) provides for substantial controlled radial loading on the crystal (14). A method of manufacturing the detector (10) includes placing the crystal (14) and shock absorbing member (76) into the sleeve (98), compressing the sleeve 98 and inserting the compressed sleeve (98) into the housing (12) such that the sleeve (98) substantially maintains its compression. The radial stiffness causes vibration induced counts to occur at an excitation frequency which is above the operational bandwidth of the radiation measurements, thereby excluding vibration induced counts for radiation measurements.
    • 闪烁检测器(10)包括闪烁晶体(14)和限定晶体(14)的减震构件(76)。 套筒(98)围绕冲击吸收构件(76),冲击吸收构件又由外壳(12)限定。 套筒(98)在晶体(14)上提供可观的径向载荷。 制造检测器(10)的方法包括将晶体(14)和减震构件(76)放置到套筒(98)中,压缩套筒98并将压缩套筒(98)插入壳体(12)中,使得 套筒(98)基本保持其压缩。 径向刚度引起振动诱发的计数发生在高于辐射测量的操作带宽的激发频率,从而排除辐射测量的振动诱导计数。