IFTSUV: an imaging Fourier transform spectrometer in UV for the next solar space missions

Details IFTSUV: an imaging Fourier transform spectrometer in UV for the next solar space missions IFTSUV: an imaging Fourier transform spectrometer in UV for the next solar space missions

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spie.6266e..72m&link_type=abstract

Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray. Edited by Turner, Martin J. L.; Hasinger, Günther. Proceedi

Computer Science

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2

Scientific paper

The study of the Sun in the UV spectral domain is essential for a better understanding of the physical processes taking place in the solar atmosphere. The main tools for this study are imagers and spectrometers. Nevertheless, the analysis of imagery data is rapidly limited unless spectral information is available, and the association of spectrometers and imagers is limited by the lack of coherence between the instruments. Therefore, the design of an imaging spectrometer in UV is a priority for solar physicists. In the far UV, only all reflective optical systems can be used thus an imaging Fourier transform spectrometer (IFTS) is the ideal candidate for the realization of such an instrument. The performances of an IFTS are given by the modulation efficiency. Theoretical study of performances and scientific objectives lead to technical and operating specifications. A mock-up of an IFTSUV has been built at IAS to validate the working principle. Its optical design and alignment are described in this paper. The first results are shown and discussed. Planned modifications of the design are also discussed.

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