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Journal Articles

MIRS: an imaging spectrometer for the MMX mission

Barucci, M. A.*; Reess, J.-M.*; Bernardi, P.*; Doressoundiram, A.*; Fornasier, S.*; Le Du, M.*; Iwata, Takahiro*; Nakagawa, Hiromu*; Nakamura, Tomoki*; Andr$'e$, Y.*; et al.

Earth, Planets and Space (Internet), 73(1), p.211_1 - 211_28, 2021/12

 Times Cited Count:8 Percentile:81.82(Geosciences, Multidisciplinary)

The MMX InfraRed Spectrometer (MIRS) is an imaging spectrometer on board of MMX JAXA mission. MIRS is built at LESIA-Paris Observatory in collaboration with four other French laboratories, collaboration and financial support of CNES and close collaboration with JAXA and MELCO. The instrument is designed to fully accomplish MMX's scientific and measurement objectives. MIRS will remotely provide near-infrared spectral maps of Phobos and Deimos containing compositional diagnostic spectral features that will be used to analyze the surface composition and to support the sampling site selection. MIRS will also study Mars atmosphere, in particular to spatial and temporal changes such as clouds, dust and water vapor.

Journal Articles

Polychromator for the edge Thomson scattering system in ITER

Yatsuka, Eiichi; Hatae, Takaki; Fujie, Daijiro*; Kurokawa, Atsuo*; Kusama, Yoshinori

Review of Scientific Instruments, 83(10), p.10E328_1 - 10E328_3, 2012/07

 Times Cited Count:2 Percentile:12.38(Instruments & Instrumentation)

On the edge Thomson scattering (TS) system in ITER, the filter polychromator is used for dispersing the scattered radiation. Since the signal in TS system is very small, it is crucial to reduce the signal loss from the collection optics to the spectrometer. A band of wavelength in the signal is extracted by an interference filter, and the remaining part is reflected at the interference filter. On the conventional polychromator, a number of reflections are necessary for extracting all wavelength bands. We proposed a new type of polychromator. On the new polychromator, both transmitted and reflected signal from an interference filter are dispersed into transmitted and reflected parts again. It enables to reduce the number of reflection at the interference filters. We showed it is possible to apply in the edge TS system in ITER by setting the injection angle of signal light into the interference filters to be approximately less than 10 degrees.

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