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Kawano, Kengo; Matsuyama, Yuji; Uemura, Jitsuya
Proceedings of the meeting on engineering and technology in basic research1995
Proceedings of the meeting on engineering and technology in basic research1995
AbstractAbstract
[en] The measurement of level in the liquid nitrogen vessel has been carried out by the weight conversion method using weigher or by putting directly a stick in the vessel. On a large CE tank, the pressure difference was read by manometer. These methods can not be used when the vessel does not put on the weigher or the pipe for manometer is stopped. We noticed the interaction between radiation (γ-ray) and substance and applied it to determine the liquid nitrogen level. The results proved it the easy method for measurement of the level in the large CE tank. Cesium 137 (γ-ray energy: 662 keV) was used as the radiation source. γ-ray transmission dose was determined by GM survey meter. The liquid nitrogen level could be determined by using the change of the transmission dose with amount of liquid nitrogen. (S.Y.)
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Takenaka, Tateru; Nigorikawa, Kazuyuki; Sugawara, Shigekatsu; Tsukada, Kiwamu; Abe, Isamu (eds.); National Lab. for High Energy Physics, Tsukuba, Ibaraki (Japan); 296 p; Jul 1995; p. 45-48; Meeting on engineering and technology in basic research; Tsukuba, Ibaraki (Japan); 16-17 Feb 1995
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