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Design and characterization of a prototype divertor viewing infrared video bolometer for NSTX-U.
van Eden, G G; Reinke, M L; Peterson, B J; Gray, T K; Delgado-Aparicio, L F; Jaworski, M A; Lore, J; Mukai, K; Sano, R; Pandya, S N; Morgan, T W.
Afiliación
  • van Eden GG; Dutch Institute for Fundamental Energy Research, 5612 AJ Eindhoven, The Netherlands.
  • Reinke ML; Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Peterson BJ; National Institute for Fusion Science, Toki 509-5292, Japan.
  • Gray TK; Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Delgado-Aparicio LF; Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, New Jersey 08543, USA.
  • Jaworski MA; Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, New Jersey 08543, USA.
  • Lore J; Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Mukai K; National Institute for Fusion Science, Toki 509-5292, Japan.
  • Sano R; National Institutes for Quantum and Radiological Science and Technology, Naka 311-0193, Japan.
  • Pandya SN; Institute for Plasma Research, Bhat Village, Gandhinagar, 382428 Gujarat, India.
  • Morgan TW; Dutch Institute for Fundamental Energy Research, 5612 AJ Eindhoven, The Netherlands.
Rev Sci Instrum ; 87(11): 11D402, 2016 Nov.
Article en En | MEDLINE | ID: mdl-27910411
The InfraRed Video Bolometer (IRVB) is a powerful tool to measure radiated power in magnetically confined plasmas due to its ability to obtain 2D images of plasma emission using a technique that is compatible with the fusion nuclear environment. A prototype IRVB has been developed and installed on NSTX-U to view the lower divertor. The IRVB is a pinhole camera which images radiation from the plasma onto a 2.5 µm thick, 9 × 7 cm2 Pt foil and monitors the resulting spatio-temporal temperature evolution using an IR camera. The power flux incident on the foil is calculated by solving the 2D+time heat diffusion equation, using the foil's calibrated thermal properties. An optimized, high frame rate IRVB, is quantitatively compared to results from a resistive bolometer on the bench using a modulated 405 nm laser beam with variable power density and square wave modulation from 0.2 Hz to 250 Hz. The design of the NSTX-U system and benchtop characterization are presented where signal-to-noise ratios are assessed using three different IR cameras: FLIR A655sc, FLIR A6751sc, and SBF-161. The sensitivity of the IRVB equipped with the SBF-161 camera is found to be high enough to measure radiation features in the NSTX-U lower divertor as estimated using SOLPS modeling. The optimized IRVB has a frame rate up to 50 Hz, high enough to distinguish radiation during edge-localized-modes (ELMs) from that between ELMs.
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Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Rev Sci Instrum Año: 2016 Tipo del documento: Article País de afiliación: Países Bajos Pais de publicación: Estados Unidos
Buscar en Google
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PubMed Links

Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Rev Sci Instrum Año: 2016 Tipo del documento: Article País de afiliación: Países Bajos Pais de publicación: Estados Unidos