Laser surface inspections: fundamentals and applications to monitor inner surface conditions of nuclear fusion reactor chambers

Koichi Kasuya; S. Ozawa; T. Norimatsu; H. Azechi; K. Mima; S. Nakai; S. Suzuki; B. Budner; W. Mroz; N. Kasuya; W. Kasuya; Kei. Kasuya; Y. Izawa; H. Furukawa; Y. Shimada; T. Yamanaka; M. Nakai; K. Nagai; K. Yokoyama; K. Ezato; M. Enoeda; M. Akiba; A. Prokopiuk

doi:10.1117/12.878465

15 November 2010 Laser surface inspections: fundamentals and applications to monitor inner surface conditions of nuclear fusion reactor chambers

Koichi Kasuya, S. Ozawa, T. Norimatsu, H. Azechi, K. Mima, S. Nakai, S. Suzuki, B. Budner, W. Mroz, N. Kasuya, W. Kasuya, Kei. Kasuya, Y. Izawa, H. Furukawa, Y. Shimada, T. Yamanaka, M. Nakai, K. Nagai, K. Yokoyama, K. Ezato, M. Enoeda, M. Akiba, A. Prokopiuk

Author Affiliations +

Proceedings Volume 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; 775119 (2010) https://doi.org/10.1117/12.878465
Event: 18th International Symposium on Gas Flow and Chemical Lasers and High Power Lasers, 2010, Sofia, Bulgaria

Abstract

The most recent fundamental research results to investigate surface erosions of nuclear fusion candidate chamber materials are described in short. We used a commercial surface profiler with a red semiconductor laser. Various material surfaces ablated and eroded by a rather short pulse electron beam and a short pulse ArF laser light were measured with this surface profiler and the associated three-dimensional analysis software. Threshold input levels for various sample surface erosions with electron and laser beams were clearly decided for the first time with our new method in this article. After the above fundamental results were gathered, the methods to inspect inner surface conditions of nuclear fusion reactor chambers were newly proposed with various kinds of laser displacement sensors. The first one is the erosion monitor with the above profiler, and the second one is the laser induced ultrasonic wave detection method to inspect deeper surface layers than the first one.

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Koichi Kasuya, S. Ozawa, T. Norimatsu, H. Azechi, K. Mima, S. Nakai, S. Suzuki, B. Budner, W. Mroz, N. Kasuya, W. Kasuya, Kei. Kasuya, Y. Izawa, H. Furukawa, Y. Shimada, T. Yamanaka, M. Nakai, K. Nagai, K. Yokoyama, K. Ezato, M. Enoeda, M. Akiba, and A. Prokopiuk "Laser surface inspections: fundamentals and applications to monitor inner surface conditions of nuclear fusion reactor chambers", Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 775119 (15 November 2010); https://doi.org/10.1117/12.878465

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KEYWORDS

Tungsten

Inspection

Sensors

Carbon

Electron beams

Laser energy

Profilometers

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