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Title: Neon-like Iron Ion Lines Measured in NIFS/Large Helical Device (LHD) and Hinode /EUV Imaging Spectrometer (EIS)

Abstract

Line intensities emerging from the Ne-sequence iron ion (Fe xvii) are measured in the laboratory, by the Large Helical Device at the National Institute for Fusion Science, and in the solar corona by the EUV Imaging Spectrometer (EIS) on board the Hinode mission. The intensity ratios of Fe xvii λ 204.6/ λ 254.8 are derived in the laboratory by unblending the contributions of the Fe xiii and xii line intensities. They are consistent with theoretical predictions and solar observations, the latter of which endorses the in-flight radiometric calibrations of the EIS instrument. The still remaining temperature-dependent behavior of the line ratio suggests the contamination of lower-temperature iron lines that are blended with the λ 204.6 line.

Authors:
;  [1]; ; ;  [2]; ; ;  [3];  [4];  [5]
  1. National Astronomical Observatory, National Institutes of Natural Sciences 2-21-1 Osawa Mitaka Tokyo, 181-8588 (Japan)
  2. SOKENDAI (Graduate University for Advanced Studies) Hayama, Miura-gun, Kanagawa, 240-0193 (Japan)
  3. National Institute for Fusion Science, National Institutes of Natural Sciences 322-6 Oroshi-cho, Toki Gifu, 509-5292 (Japan)
  4. Chubu University 1200 Matsumoto-cho, Kasugai Aichi, 487-0027 (Japan)
  5. The University of Electro-Communications 1-5-1 Chofugaoka, Chofu Tokyo, 182-8585 (Japan)
Publication Date:
OSTI Identifier:
22663534
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 842; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CALIBRATION; EXTREME ULTRAVIOLET RADIATION; FORECASTING; IRON; IRON IONS; LHD DEVICE; NEON; PLASMA; SOLAR CORONA; SPECTRA; SPECTROMETERS; SUN; TEMPERATURE DEPENDENCE; ULTRAVIOLET RADIATION

Citation Formats

Watanabe, Tetsuya, Hara, Hirohisa, Murakami, Izumi, Kato, Daiji, Morita, Shigeru, Sakaue, Hiroyuki A., Suzuki, Chihiro, Tamura, Naoki, Yamamoto, Norimasa, and Nakamura, Nobuyuki, E-mail: watanabe@uvlab.mtk.nao.ac.jp. Neon-like Iron Ion Lines Measured in NIFS/Large Helical Device (LHD) and Hinode /EUV Imaging Spectrometer (EIS). United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA7386.
Watanabe, Tetsuya, Hara, Hirohisa, Murakami, Izumi, Kato, Daiji, Morita, Shigeru, Sakaue, Hiroyuki A., Suzuki, Chihiro, Tamura, Naoki, Yamamoto, Norimasa, & Nakamura, Nobuyuki, E-mail: watanabe@uvlab.mtk.nao.ac.jp. Neon-like Iron Ion Lines Measured in NIFS/Large Helical Device (LHD) and Hinode /EUV Imaging Spectrometer (EIS). United States. doi:10.3847/1538-4357/AA7386.
Watanabe, Tetsuya, Hara, Hirohisa, Murakami, Izumi, Kato, Daiji, Morita, Shigeru, Sakaue, Hiroyuki A., Suzuki, Chihiro, Tamura, Naoki, Yamamoto, Norimasa, and Nakamura, Nobuyuki, E-mail: watanabe@uvlab.mtk.nao.ac.jp. Sat . "Neon-like Iron Ion Lines Measured in NIFS/Large Helical Device (LHD) and Hinode /EUV Imaging Spectrometer (EIS)". United States. doi:10.3847/1538-4357/AA7386.
@article{osti_22663534,
title = {Neon-like Iron Ion Lines Measured in NIFS/Large Helical Device (LHD) and Hinode /EUV Imaging Spectrometer (EIS)},
author = {Watanabe, Tetsuya and Hara, Hirohisa and Murakami, Izumi and Kato, Daiji and Morita, Shigeru and Sakaue, Hiroyuki A. and Suzuki, Chihiro and Tamura, Naoki and Yamamoto, Norimasa and Nakamura, Nobuyuki, E-mail: watanabe@uvlab.mtk.nao.ac.jp},
abstractNote = {Line intensities emerging from the Ne-sequence iron ion (Fe xvii) are measured in the laboratory, by the Large Helical Device at the National Institute for Fusion Science, and in the solar corona by the EUV Imaging Spectrometer (EIS) on board the Hinode mission. The intensity ratios of Fe xvii λ 204.6/ λ 254.8 are derived in the laboratory by unblending the contributions of the Fe xiii and xii line intensities. They are consistent with theoretical predictions and solar observations, the latter of which endorses the in-flight radiometric calibrations of the EIS instrument. The still remaining temperature-dependent behavior of the line ratio suggests the contamination of lower-temperature iron lines that are blended with the λ 204.6 line.},
doi = {10.3847/1538-4357/AA7386},
journal = {Astrophysical Journal},
number = 1,
volume = 842,
place = {United States},
year = {Sat Jun 10 00:00:00 EDT 2017},
month = {Sat Jun 10 00:00:00 EDT 2017}
}