[Table of Contents]

Plasma and Fusion Research

Volume 8, 2402147 (2013)

Regular Articles

Development of Divertor IR Thermography for ITER
Masaki TAKEUCHI, Tatsuo SUGIE, Hiroaki OGAWA, Masao ISHIKAWA, Takahiko SHIMADA and Yoshinori KUSAMA
Japan Atomic Energy Agency, Naka 311-0193, Japan
(Received 7 December 2012 / Accepted 3 August 2013 / Published 15 November 2013)

Abstract

Infrared (IR) thermography is a useful diagnostic tool for measuring surface temperatures on divertor plates by using light emitted in the IR range. Japan plans to procure and develop divertor IR thermography for the ITER project. The system design, optical design, and evaluation of detected photons have already been conducted. All optical devices will be installed in the occupied space without interfering with other devices. The required spatial resolution of 3 mm on divertor plates is satisfied by the designed optics. The gamma-ray dose rate at 106 s after shutdown of operations (shutdown dose rate) in the interspace is low (15 - 20 μSv/h). Two color detectors and a spectroscopic system are designed using mirrors with high reflectivity in the range 1 - 5 μm. From the evaluation of detected photons, sufficient photons at 3 and 5 μm can be detected at low emissivity (ε = 0.2).

Keywords

infrared thermography, divertor, spectroscopy, ITER, diagnostics

DOI: 10.1585/pfr.8.2402147

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References

  • [1] K. Itami et al., J. Nucl. Mater. 196-198, 755 (1992).
  • [2] A. Herrmann et al., Plasma Phys. Control. Fusion 37, 17 (1995).
  • [3] C.J. Lasnier et al., Nucl. Fusion 38, 1225 (1998).
  • [4] P. Andrew et al., J. Nucl. Mater. 313-316, 135 (2003).
  • [5] R. Reichle et al., Rev. Sci. Instrum. 75, 4129 (2004).
  • [6] D. Guilhem et al., Fusion Eng. Des. 74, 879 (2005).
  • [7] J.L. Terry et al., Rev. Sci. Instrum. 81, 10E513 (2010).
  • [8] R. Reichle et al., Rev. Sci. Instrum. 81, 10E135 (2010).
  • [9] ITER Project Requirements, ITER Document No. ITER_D_27ZRW8.
  • [10] E. Ishitsuka et al., Effects of Radiation on Materials, 19th International Symposium, ASTM STP 1366, M.L. Hamilton, A.S. Kumar, S.T. Rosinski and M.L. Grossbeck, eds., American Society for Testing and Materials (1999) p.1176.

This paper may be cited as follows:

Masaki TAKEUCHI, Tatsuo SUGIE, Hiroaki OGAWA, Masao ISHIKAWA, Takahiko SHIMADA and Yoshinori KUSAMA, Plasma Fusion Res. 8, 2402147 (2013).