[P-CG18] 宇宙・惑星探査の将来計画および関連する機器開発の展望

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

*村上 豪¹、土屋 史紀²、鍵谷 将人²、山崎 敦¹、吉岡 和夫³、桑原 正輝⁴、塩谷 圭吾¹、松田 昇也⁵ (1.宇宙航空研究開発機構宇宙科学研究所、2.東北大学大学院理学研究科惑星・プラズマ大気研究センター、3.東京大学大学院新領域創成科学研究科、4.立教大学、5.金沢大学)

キーワード：紫外線、宇宙望遠鏡、上層大気

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.