国立天文台(NAOJ)
宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)
国立天文台(NAOJ)
国立天文台(NAOJ)
国立天文台(NAOJ)
National Solar Observatory (NSO)
京都大学
国立天文台(NAOJ)
国立天文台(NAOJ)
三菱プレシジョン株式会社
三菱プレシジョン株式会社
三菱プレシジョン株式会社
三菱プレシジョン株式会社
有限会社テクノクラフト
有限会社テクノクラフト
Max Planck Institute for Solar System Research
Instituto Astrofisica Andalucia (IAA-CSIC)
著者所属（英）
National Astronomical Observatory of Japan (NAOJ)
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
National Astronomical Observatory of Japan (NAOJ)
National Astronomical Observatory of Japan (NAOJ)
National Astronomical Observatory of Japan (NAOJ)
National Solar Observatory (NSO)
Kyoto University
National Astronomical Observatory of Japan (NAOJ)
National Astronomical Observatory of Japan (NAOJ)
Mitsuibishi Precision Co., Ltd.
Mitsuibishi Precision Co., Ltd.
Mitsuibishi Precision Co., Ltd.
Mitsuibishi Precision Co., Ltd.
Techno-craft Ltd.
Techno-craft Ltd.
Max Planck Institute for Solar System Research
Instituto Astrofisica Andalucia (IAA-CSIC)
The Sunrise Chromospheric Infrared spectroPolarimeter (SCIP) for the SUNRISE-3 balloon experiment is a slit-scanning spectropolarimeter that simultaneously observes multiple lines in the 770 nm and the 850 nm bands with a polarimetric precision of 0.03 % (1σ). The key to high-precision polarization measurements by SCIP is a polarization modulation unit that rotates a waveplate continuously at a constant speed. The waveplate consists of two birefringent plates made of sapphire and quartz to achieve a constant retardation in a wide wavelength range. We have confirmed that the retardation is almost constant in the wavelength bands of SCIP and its variation is negligibly small under the operational temperature conditions (20 +/- 10 degree C). The rotating mechanism is a DC brushless motor originally developed for the high-precision polarimetric observations in a future space mission, and we developed the control logic optimized for the uniform rotation at 0.512 s/rotation. The fast polarization modulation is essential for investigating the magnetic fields of the dynamical chromospheric structures. We have verified that a rotation uniformity by the control logic can achieve the polarization precision of 0.03 % (1σ) required for SCIP, and also verified that such an excellent rotation performance is unchanged under thermal vacuum conditions simulating the flight environment of the SUNRISE-3 balloon.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
SUNRISE-3 大気球太陽観測実験: 高精度赤外線偏光分光装置に搭載する偏光変調ユニットの開発
AA2030024006.pdf
(31.74MB)
