[P-CG18] Future missions and instrumentation for space and planetary science

[PCG18-06] Life-environmentology, Astronomy, and PlanetarY Ultraviolet Telescope Assembly (LAPYUTA) mission: instrument overview and technical developments

*Go Murakami¹, Fuminori Tsuchiya², Masato Kagitani², Atsushi Yamazaki¹, Kazuo Yoshioka³, Masaki Kuwabara⁴, Keigo Enya¹, Shoya Matsuda⁵ (1.Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 2.Planetary Plasma and Atmospheric Research Center, Graduate School of Science, Tohoku University, 3.Graduate School of Frontier Science, The University of Tokyo, 4.Rikkyo University, 5.Kanazawa University)

Keywords:Ultraviolet, Space telescope, Upper atmosphere

The Life-environmentology, Astronomy, and PlanetarY Ultraviolet Telescope Assembly (LAPYUTA) mission aims to carry out spectroscopy with a large effective area (>300 cm2) and a high spatial resolution (0.1 arc-sec) and imaging with a wide field of view in an ultraviolet spectral range (110-190 nm) from a space telescope. The main part of the science payload is a Cassegrain-type telescope with a 60 cm-diameter primary mirror. Two main instruments are installed on the focal plane of the telescope: a spectrometer and a UV slit imager. The spectrometer contains a movable slit with different slit width, a holographic toroidal grating with 2000 lines/mm, and an MCP detector coupled with CMOS imaging sensors. Spectral resolution of <0.01 nm and field-of-view of 100 arc-sec will be achieved. A UV slit imager consists of imaging optics, several bandpass filters with a wheel, and a same type of UV detector as the one installed in the spectrometer. In order to achieve a high spatial resolution of 0.1 arc-sec, we will install a target monitoring camera at 0^th order position inside the spectrometer and slit imager for both attitude control and image accumulation process. We are studying the concept of LAPYUTA and preparing a proposal of it to JAXA’s M-class category. Here we present the LAPYUTA concept design, the overview of the spacecraft and instruments, and the status of technical developments.