Abstract: An illumination device (10) for simulating neon lighting comprises an elongated light guide (14) and a light engine (12), operatively connected the elongated light guide (14). The light engine includes a plurality of LEDs (18). The light engine is positioned in relation to the light guide (14) such that light emanating from the light engine (12) passes through the light guide (14).

Abstract: A modular radiation detector includes a scintillator module containing a crystal, and an electronics module containing a light sensing device such as a photomultiplier tube (PMT), and an electronics package. The scintillator module and the electronics module are releaseably mechanically coupled, for example by means of mating threaded portions on each of the modules. The crystal and the PMT are optically coupled via an optical window in the scintillator module and a removable gel pad which is pressed between the modules as they are mechanically coupled together.

Abstract: A scintillation detector includes a scintillation crystal directly coupled to a photomultiplier tube (PMT). The crystal/PMT subassembly is attached to a voltage divider and the entire device is hermetically sealed in a stainless steel outer case. Conductors are passed through the hermetic package from the voltage divider via a high temperature metal to ceramic pass-through. The crystal and PMT are longitudinally loaded within the outer case by springs in order to minimize vibrations in the crystal and PMT. A thermoplastic support sleeve circumscribes the crystal and the PMT to protect the crystal and PMT from excessive longitudinal loading. Preferably, the support sleeve and the crystal have similar coefficients of thermal expansion so that the crystal and the support sleeve experience similar dimensional changes due to temperature fluctuations, allowing the support sleeve to best maintain its stress-limiting function as temperature within the detector changes.

Abstract: 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.