Design study of a wide-angle infrared thermography and visible observation diagnostic on JT-60SA |
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| Affiliation: | 1. Japan Atomic Energy Agency (JAEA), Naka 311-0193, Ibaraki-ken, Japan;2. Genesia Co., Mitaka, Tokyo 181-0013, Japan;1. School of Materials Science and Engineering, Sichuan University, Chengdu 610064, PR China;2. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, PR China;1. Associazione Euratom-ENEA sulla Fusione, Via E. Fermi 45, 00044 Frascati, Italy;2. Istituto di Fisica dei Plasmi, CNR, Via R. Cozzi 53, 20125 Milano, Italy;1. Institute of Plasma Physics of the Czech Academy of Sciences, Prague, Czechia;2. Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czechia;3. Charles University, Faculty of Mathematics and Physics, Prague, Czechia;4. Faculty of Mathematics, Physics and Informatics, Comenius University in Bratislava, Bratislava, Slovakia;1. CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France;2. CEA, DEN/DER, F-13108 Saint-Paul-lez-Durance, France;3. CIEMAT, Avda. Complutense, 40, Madrid 28040, Spain;4. Greenlight Solutions S.L., San Bernardo 20-1, Madrid 28015, Spain;5. Bertin Technologies, 55 rue Louis-Armand, CS 30495, 13593 Aix-en-Provence Cedex 3, France;6. ITER Organization, Route de Vinon sur Verdon, CS 90 046, 13067 Saint-Paul-lez-Durance Cedex, France;7. F4E, Josep Pla 2, Torres Diagonal Litoral B3, 08019 Barcelona, Spain |
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| Abstract: | Design study of a wide-angle infrared (IR) thermography (surface temperature measurement) and visible observation diagnostics for JT-60SA are reported. The new design offers an optical solution without a “blind spot” which is one of the advantages. In order to image a large section inside the vacuum vessel (both in poloidal and toroidal directions), the optical system of endoscope is to provide a wide-angle view in the IR and visible wavelength ranges. The estimated IR optical spatial resolution is approximately 2 cm at a distance of 7.6 m from the front optics with a pupil diameter of 4 mm. For a surface temperature measurement it would be larger (∼4 cm for a surface temperature error less than 5%). The optics of this system can be divided into three parts: (1) a mirror based optical head (two set of spherical mirrors plus two flat mirrors) that produces an intermediate image, (2) a Cassegrain telescope system, and (3) a relay group of lenses, being adapted to the two kinds of detectors for IR and visible observations. |
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| Keywords: | JT-60SA Diagnostic IR camera Visible camera Optics Wide angle view |
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