Regular Articles

Full Text / References

Foil Calibration for IR Imaging Bolometer by Laser Irradiation

Ryuichi SANO, Byron J. PETERSON¹⁾, Evgeny A. DRAPIKO¹⁾, Dongcheol SEO²⁾, Yuji YAMAUCHI³⁾ and Tomoaki HINO³⁾

Graduate School of Engineering, Hokkaido University, Kita-13, Nishi-8, Kita-ku, Sapporo 060-8628, Japan

1)

National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan

2)

National Fusion Research Institute, Daejeon 305-806, Republic of Korea

3)

Faculty of Engineering, Hokkaido University, Kita-13, Nishi-8, Kita-ku, Sapporo 060-8628, Japan

(Received 9 December 2011 / Accepted 4 March 2012 / Published 10 May 2012)

Abstract

The IR imaging video bolometer (IRVB) provides the power distribution of plasma radiation. The radiation distribution is obtained from the temperature distribution on the bolometer foil. It is necessary to calibrate between the temperature distribution and the incident radiation power on the bolometer foil. This paper describes a new calibration technique for the foil which we have developed. The bolometer foil was irradiated with a He-Ne laser and the temperature distribution was measured by an IR camera while changing the irradiation position. The temperature distribution measured was analyzed by the comparison with the results calculated by FEM. We repeated this comparison while changing the parameters such as effective foil thickness and effective emissivity in the calculation until the calculated distribution converged to the measured one. The temperature distribution calculated by the FEM agreed well with the measured one, so the calibration between the radiation power and the temperature profile can be suitably conducted by this technique.

Copyright (c) 2012 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

IRVB, plasma diagnostics

DOI: 10.1585/pfr.7.2405039

Full Text

PDF format (351Kbytes)

References

• [1] B.J. Peterson, A.Yu. Kostrioukov, N. Ashikawa, M. Osakabe and S. Sudo, Rev. Sci. Instrum. 74(3), 2040 (2003).
• [2] B.J. Peterson, S. Yoshimura, E.A. Drapiko, D.C. Seo, N. Ashikawa and J. Miyazawa, Fusion Sci. Technol. 58(1), 412 (2010).
• [3] B.J. Peterson, S. Konoshima, H. Parchamy, M. Kaneko, T. Omori, D.C. Seo, N. Ashikawa, A. Sukegawa and JT-60U Team, J. Nucl. Mater. 363-365, 412 (2007).
• [4] Y. Liu, N. Tamura, B.J. Peterson, N. Iwama, S. Konoshima, LHD Experimental Group and JT-60 Team, Plasma Fusion Res. 2, S1124 (2007).
• [5] H. Parchamy, B.J. Peterson, S. Konoshima, H. Hayashi, D.C. Seo, N. Ashikawa and JT-60U Team, Rev. Sci. Instrum. 77, 10E515 (2006).
• [6] E. Drapiko, B. Peterson, A. Alekseev and D.C. Seo, Rev. Sci. Instrum. 81, 10E116 (2010).

This paper may be cited as follows:

Ryuichi SANO, Byron J. PETERSON, Evgeny A. DRAPIKO, Dongcheol SEO, Yuji YAMAUCHI and Tomoaki HINO, Plasma Fusion Res. 7, 2405039 (2012).