2015 Fiscal Year Final Research Report
Development of highly-sensitive spectrograph for studying dynamic MHD phenomena in the solar atmosphere
Project/Area Number |
25707011
|
Research Category |
Grant-in-Aid for Young Scientists (A)
|
Allocation Type | Partial Multi-year Fund |
Research Field |
Astronomy
|
Research Institution | National Astronomical Observatory of Japan |
Principal Investigator |
Katsukawa Yukio 国立天文台, 太陽天体プラズマ研究部, 助教 (00399289)
|
Project Period (FY) |
2013-04-01 – 2016-03-31
|
Keywords | 太陽物理学 / 彩層 / ジェット / 赤外線検出器 / 面分光装置 / 偏光分光観測 / プラズマ |
Outline of Final Research Achievements |
Key techniques were developed aiming for high-sensitivity spectro-polarimetry in the visible and near-infrared spectrum lines in this research project. (1) A near-infrared camera utilizing a HgCdTe sensor was developed. It was demonstrated that the sensor has fast-readout and sensitivity performance required in spectro-polarimetry in the wavelength range 500 - 1500 nm, (2) An integrated field unit utilizing optic fiber bundles was developed. The uniqueness is that the fiber bundle consists of rectangular fiber cores having polarization maintenance property. Its light-transfer and polarization property was clarified using newly developed rectangular fiber bundles. Furthermore, (3) Zeeman-Hanle diagnostic performance was demonstrated quantitatively using observation and numerical data. It was discovered that high-speed chromospheric jets in a sunspot heat the atmosphere from 10 kK to 100 kK using an observation with the Hinode and IRIS spacecrafts.
|
Free Research Field |
天文学
|