| Project/Area Number |
59420001
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| Research Category |
Grant-in-Aid for General Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Astronomy
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| Research Institution | Tokyo University |
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Principal Investigator |
TANAKA Katsuo Tokyo Univ., Tokyo Astronomical Observatory, 東京天文台, 助教授 (90011593)
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| Co-Investigator(Kenkyū-buntansha) |
HAMANA Shigeo Tokyo Univ., Tokyo Astronomical Observatory, 東京天文台, 講師 (80012847)
MIYAZAKI Hideaki Tokyo Univ., Tokyo Astronomical Observatory, 東京天文台, 助手 (00012873)
HIRAYAMA Tadashi Tokyo Univ., Tokyo Astronomical Observatory, 東京天文台, 教授 (20012841)
MAKITA Mitsugu Tokyo Univ., Tokyo Astronomical Observatory, 東京天文台, 教授 (90012806)
HIEI Eijiro Tokyo Univ., Tokyo Astronomical Observatory, 東京天文台, 教授 (60012796)
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| Project Period (FY) |
1984 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥28,000,000 (Direct Cost: ¥28,000,000)
Fiscal Year 1986: ¥6,000,000 (Direct Cost: ¥6,000,000)
Fiscal Year 1985: ¥9,000,000 (Direct Cost: ¥9,000,000)
Fiscal Year 1984: ¥13,000,000 (Direct Cost: ¥13,000,000)
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| Keywords | Solar seismology / Solar velocity fields / Magneto-optical filter / Na vapor / Ceramic cell / Magneto-optical effect / CCD / Image processor / Optical disk / KDP / 太陽内部構造 / 日震学 / 5分振動 / 磁気光学フィルター / 太陽磁場 |
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| Research Abstract |
In order to perform long-term observations of solar full-disk velocity field and magnetic field, a new observing system has been developed. This system consists of (1) magneto-optical filter with Na vapor embedded in strong magnetic field (2500G), (2) optical data handling system which enables real time detection of resolved velocity fields of the sun using KDP, image processor and CCD detector, and (3) optical disk system which can record enormous amount of data so that solar seismology observation is achieved. In making the magneto-optical filter special techniques were developed to obtain stable Na cell in high temperature (300゜C) condition using special Schott glass and cermic cell. Completed cell has an active temperature control system and can be applied, for the first time, to very long observations of solar velocity fields necessary for the solar seismology study. Using this filter we succeeded in finding a new magneto-optical effect realized when elliptically-polarized lights enter. Two kinds of filters with the magnetic field vertical and parallel, respectively, to the optical axis have been developed. With the completed system along-term observation of solar velocity and magnetic fields are currently in progress.
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