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TY - CONF AU - Tongu, H. AU - Hajima, R. AU - Hayano, H. AU - Hokonohara, H. AU - Iwashita, Y. AU - Kubo, T. AU - Saeki, T. AU - Sawamura, M. AU - Yamamoto, Y. ED - Petit-Jean-Genaz, Christine ED - Kim, Dong Eon ED - Kim, Kyung Sook ED - Ko, In Soo ED - Schaa, Volker RW TI - Study on Nondestructive Inspections for Super-conducting Cavity J2 - Proc. of IPAC2016, Busan, Korea, May 8-13, 2016 C1 - Busan, Korea T2 - International Particle Accelerator Conference T3 - 7 LA - english AB - We have been studying nondestructive inspections for super-conducting spoke cavities. The temperature mapping (T-map) and X-ray mapping (X-map) are powerful inspection methods to locate a hot spot during the vertical RF tests. There would be a defect under the hot spot and the defect may be the cause of a quench. Our XT-map system (a combined system of T-map and X-map) has a high resolution in space. Because the huge amount of sensor signals are multiplexed at a hi-speed scanning rate in the vicinity of the sensors, the small number of signal lines makes the installation process easy and reduces the system complexity. Our XT-map got useful results on finding a defect in vertical RF tests of International Linear collider super-conducting cavity. The XT-map system is useful as low cost nondestructive inspections for superconducting spoke cavity. The study will be reported. progresses will be reported. PB - JACoW CP - Geneva, Switzerland SP - 2174 EP - 2176 KW - cavity KW - cryogenics KW - survey KW - interface KW - radiation DA - 2016/06 PY - 2016 SN - 978-3-95450-147-2 DO - 10.18429/JACoW-IPAC2016-WEPMB024 UR - http://jacow.org/ipac2016/papers/wepmb024.pdf ER -