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First Results of Minimum Fisher Regularisation as Unfolding Method for JET NE213 Liquid Scintillator Neutron Spectrometry
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SYSNO ASEP 0041843 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title First Results of Minimum Fisher Regularisation as Unfolding Method for JET NE213 Liquid Scintillator Neutron Spectrometry Title První výsledky minimální Fischerovy regularizace jako metody k dekonvoluci neutronových spekter z kapalinového scintilátoru NE213 na JET Author(s) Mlynář, Jan (UFP-V) RID
Adams, J. M. (GB)
Bertalot, L. (IT)
Conroy, S. (SE)Source Title Fusion Engineering and Design. - : Elsevier - ISSN 0920-3796
Roč. 74, 1-4 (2005), s. 781-786Number of pages 12 KB Publication form - - - Action Symposium on Fusion Technology - SOFT/23rd./ Event date 20.9.2004-24.9.2004 VEvent location Benátky Country IT - Italy Event type EUR Language eng - English Country CH - Switzerland Keywords Tokamak ; fusion ; neutron diagnostic ; spectrum unfolding ; scintillator regularisation Subject RIV BL - Plasma and Gas Discharge Physics CEZ AV0Z20430508 - UFP-V (2005-2011) Annotation At JET, the NE213 liquid scintillator is being validated as a diagnostic tool for spectral measurements of neutrons emitted from the plasma. Neutron spectra have to be unfolded from the measured pulse-height spectra, which is an ill-conditioned problem. Therefore, use of two independent unfolding methods allows for less ambiguity on the interpretation of the data. In parallel to the routine algorithm MAXED based on the Maximum Entropy method, the Minimum Fisher Regularisation (MFR) method has been introduced at JET. The MFR method, known from two-dimensional tomography applications, has proved to provide a new transparent tool to validate the JET neutron spectra measured with the NE213 liquid scintillators. In this article, the MFR method applicable to spectra unfolding is briefly explained. After a mention of MFR tests on phantom spectra experimental neutron spectra are presented that were obtained by applying MFR to NE213 data in selected JET experiments. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2007
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