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A testing jig for sealed beam monitors
Physics in Medicine and Biology, 1987The dose received by a patient during radiotherapy on a linear accelerator is monitored by an ionisation chamber. The beam monitor in a Philips SL-75 accelerator is a dry-nitrogen-filled sealed box containing a pair of parallel-plate transmission ionisation chambers. If the monitor develops an air leak the charge measured by the chambers will fluctuate
T M, Kehoe, D, Barnard
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Junction Seal Development for the Beam-Lead Sealed-Junction Technology
6th Annual Reliability Physics Symposium (IEEE), 1967Most high reliability semiconductor devices are encapsulated in hermetically sealed metal enclosures. Lower cost, accompanied, however, by lower reliability, has been obtained with plastic encapsulations. A junction seal has been developed which consists of a metal-insulator-silicon system of materials comprised of the beam-lead contact(1) in ...
A. A. Bergh, G. H. Schneer
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SAE Technical Paper Series, 1979
<div class="htmlview paragraph">Recent admendments to the Federal Motor Vehicle Safety Standard No. 108 open new markets for headlamps of sealed construction utilizing the higher efficiency halogen regenerative cycle light sources.</div> <div class="htmlview paragraph">The terminology related to halogen-cycle lamps and the chemical ...
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<div class="htmlview paragraph">Recent admendments to the Federal Motor Vehicle Safety Standard No. 108 open new markets for headlamps of sealed construction utilizing the higher efficiency halogen regenerative cycle light sources.</div> <div class="htmlview paragraph">The terminology related to halogen-cycle lamps and the chemical ...
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Performance evaluation of waterborne epoxy resin-SBR composite modified emulsified asphalt fog seal
Construction and Building Materials, 2021Mulian Zheng
exaly