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|Title:||First fusion proton measurements in TEXTOR plasmas using activation technique|
|Authors:||BONHEURE Georges; MLYNAR J.; VAN WASSENHOVE G.; HULT Mikael; GONZALEZ DE ORDUNA R.; LUTTER GUILLAUME; VERMAERCKE P.; HUBER A.; SCHWEER B.; ESSER G.; BIEL W.|
|Citation:||REVIEW OF SCIENTIFIC INSTRUMENTS vol. 83 no. 10 p. 10D318 [3 pages]|
|Publisher:||AMER INST PHYSICS|
|Type:||Articles in periodicals and books|
|Abstract:||MeV particle loss measurements from fusion plasmas, in particular alpha particles, remain difficult in large fusion devices and further R&D is needed for ITER. This paper describes the first attempt to measure 3 MeV escaping fusion protons emitted from TEXTOR tokamak plasmas using activation technique. This technique was successfully demonstrated, initially, in 2006 on the JET tokamak. An ion camera equipped with a collimator and several types of activation detectors was installed inside the TEXTOR vacuum vessel to perform these measurements. After irradiation, the detectors were analyzed using ultra low level gamma-ray spectrometry at the HADES underground laboratory. 3MeV escaping fusion protons were detected in larger number −~6 times more - compared to earlier measurements using this technique on JET. Another major progress was the reduction of the cooling time by a factor of 50, which made possible to detect radionuclides with half-life of less than 90 min.|
|JRC Directorate:||Health, Consumers and Reference Materials|
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