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3. UV/EUV High-Throughput Spectroscopic Telescope: A Next Generation Solar Physics Mission white paper

Author

Imada, S., Shimizu, T., Kawate, T., Hara, H., and Watanabe, T.

Subjects
Astrophysics - Solar and Stellar Astrophysics
Abstract

The origin of the activity in the solar corona is a long-standing problem in solar physics. Recent satellite observations, such as Hinode, Solar Dynamics Observatory (SDO), Interface Region Imaging Spectrograph (IRIS), show the detail characteristics of the solar atmosphere and try to reveal the energy transfer from the photosphere to the corona through the magnetic fields and its energy conversion by various processes. However, quantitative estimation of energy transfer along the magnetic field is not enough. There are mainly two reason why it is difficult to observe the energy transfer from photosphere to corona; 1) spatial resolution gap between photosphere (a few 0.1 arcsec) and corona (a few arcsec), 2) lack in temperature coverage. Furthermore, there is not enough observational knowledge of the physical parameters in the energy dissipation region. There are mainly three reason why it is difficult to observe in the vicinity of the energy dissipation region; 1) small spatial scale, 2) short time scale, 3) low emission. It is generally believed that the energy dissipation occurs in the very small scale and its duration is very short (10 second). Further, the density in the dissipation region might be very low. Therefore, the high spatial and temporal resolution UV/EUV spectroscopic observation with wide temperature coverage is crucial to estimate the energy transport from photosphere to corona quantitatively and diagnose the plasma dynamics in the vicinity of the energy dissipation region. Main Science Target for the telescope is quantitative estimation for the energy transfer from the photosphere to the corona, and clarification of the plasma dynamics in the vicinity of the energy dissipation region, where is the key region for coronal heating, solar wind acceleration, and/or solar flare, by the high spatial and temporal resolution UV/EUV spectroscopy., Comment: 5page

Published
2017

4. Observations and simulations of the Na I D1 line profiles in an M-class solar flare

Author

Kuridze, D., Mathioudakis, M., Christian, D. J., Kowalski, A. F., Jess, D. B., Grant, S. D. T., Kawate, T., Simões, P. J. A., Allred, J. C., and Keenan, F. P.

Subjects
Astrophysics - Solar and Stellar Astrophysics
Abstract

We study the temporal evolution of the Na I D1 line profiles in the M3.9 flare SOL2014-06-11T21:03 UT, using high spectral resolution observations obtained with the IBIS instrument on the Dunn Solar Telescope combined with radiative hydrodynamic simulations. Our results show a significant increase in line core and wing intensities during the flare. The analysis of the line profiles from the flare ribbons reveal that the Na I D1 line has a central reversal with excess emission in the blue wing (blue asymmetry). We combine RADYN and RH simulations to synthesise Na I D1 line profiles of the flaring atmosphere and find good agreement with the observations. Heating with a beam of electrons modifies the radiation field in the flaring atmosphere and excites electrons from the ground state $\mathrm{3s~^2S}$ to the first excited state $\mathrm{3p~^2P}$, which in turn modifies relative population of the two states. The change in temperature and the population density of the energy states make the sodium line profile revert from absorption into emission. Analysis of the simulated spectra also reveals that the Na I D1 flare profile asymmetries are produced by the velocity gradients generated %and opacity effects in the lower solar atmosphere., Comment: 7 pages, 8 figures, accepted in ApJ

Published
2016
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5. Multi-Wavelength Observation of Electron Acceleration in the 2006 December 13 Flare

Author

Minoshima, T., Imada, S., Morimoto, T., Kawate, T., Koshiishi, H., Kubo, M., Inoue, S., Isobe, H., Masuda, S., Krucker, S., and Yokoyama, T.

Subjects
Astrophysics - Solar and Stellar Astrophysics
Abstract

We present a multi-wavelength observation of a solar flare occurring on 2006 December 13 with Hinode, RHESSI, and the Nobeyama Radio Observatory, to study the electron acceleration site and mechanism. The Solar Optical Telescope (SOT) on board Hinode observed elongated flare ribbons, and RHESSI observed double-footpoint hard X-ray (HXR) sources appearing in part of the ribbons. A photospheric vector magnetogram obtained from SOT reveals that the HXR sources are located at the region where horizontal magnetic fields change the direction. The region is interpreted as the footpoint of magnetic separatrix. Microwave images taken with the Nobeyama Radioheliograph show a loop structure connecting the HXR sources. The brighter parts of the microwave intensity are located between the top and footpoints of the loop. We consider these observations as an evidence of the electron acceleration near the magnetic separatrix and injection parallel to the field line., Comment: 20 pages, 7 figures, accepted by ApJ

Published
2009
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10. Experimental study on boron distribution and transport at plasma-facing components during impurity powder dropping in the Large Helical Device

Author

Kawate, T., primary, Ashikawa, N., additional, Goto, M., additional, Oishi, T., additional, Kawamoto, Y., additional, Toyoda, H., additional, Shoji, M., additional, Kawamura, G., additional, Masuzaki, S., additional, Nespoli, F., additional, Gilson, E.P., additional, Lunsford, R., additional, Suzuki, C., additional, Nagy, A., additional, and Gates, D., additional

Published
2022
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13. Abstract P5-22-09: Feasibility study to diagnose pathological complete response by neoadjuvant chemotherapy in breast cancer adding core needle biopsy (KBOG1301 supported by JONIE)

Author

Narui, K, primary, Ishikawa, T, additional, Hasegawa, Y, additional, Kaise, H, additional, Kawate, T, additional, Yamada, K, additional, Suzuki, Y, additional, Niikura, N, additional, Kohno, N, additional, Kimoto, T, additional, Sugae, S, additional, Yamada, A, additional, Kosaka, Y, additional, Miyashita, M, additional, Okamura, T, additional, Shimizu, D, additional, Tanino, H, additional, Sakamaki, K, additional, and Tokuda, Y, additional

Published
2018
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20. SOLAR-Cにする搭載狭帯域チューナブル・フィルターの開発

Author

Hagino, Masaoki, Ichimoto, Kiyoshi, Kimura, Gouichi, Nakatani, Yoshikazu, Kawate, T., Shinoda, K., Suematsu, Yoshinori, Hara, Hirohisa, and Shimizu, Toshifumi

Abstract

第14回宇宙科学シンポジウム (2014年1月9日-10日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 14ｔh Space Science Symposium (January 9-10, 2014. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan, 資料番号: SA6000058123, レポート番号: P2-091

Published
2014

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