[Table of Contents]

Plasma and Fusion Research

Volume 2, S1054 (2007)

Regular Articles

Development of Impurity Influx Monitor (Divertor) for ITER
Hiroaki OGAWA, Tatsuo SUGIE1), Satoshi KASAI, Atsushi KATSUNUMA2), Hirotsugu HARA3) and Yoshinori KUSAMA
Japan Atomic Energy Agency, Naka, Ibaraki 310-0193, Japan
1)
ITER-IT, Naka, Ibaraki 310-0193, Japan
2)
Nikon Co., Shinagawa, Tokyo 140-0015, Japan
3)
Toyama Co., LTD., Zama, Kanagawa 228-0003, Japan
(Received 4 December 2006 / Accepted 13 March 2007 / Published 20 November 2007)

Abstract

The optical design of Impurity Influx Monitor (divertor) was carried out for new ITER design and ray-tracing analysis shows that the spatial resolution of ITER requirement (50 mm) will be achieved by these optical systems designed here. The mechanical design of front end optics also carried out based on the optical design and results of port integration. In the upper port, front end optics can be installed inside the pipe of inner diameter of φ300 mm. In the equatorial port, all the optical component are placed to avoid the interaction with other diagnostic equipments. Heat analysis was carried out for the optimization the cooling method of mirrors, mirror holders and mounting modules to reduce the temperature rise caused by the nuclear heating. It indicates that mirrors can be cooled by the thermal conduction using mirror holders made of a copper alloy and making many cooling channels on the mounting module. Finally, the effect of the thermal deformation to the optical properties is estimated by using the optical design code.

Keywords

ITER, impurity, spectroscopy, optical design, mechanical design, front end optics, heat analysis, nuclear heating

DOI: 10.1585/pfr.2.S1054

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References

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This paper may be cited as follows:

Hiroaki OGAWA, Tatsuo SUGIE, Satoshi KASAI, Atsushi KATSUNUMA, Hirotsugu HARA and Yoshinori KUSAMA, Plasma Fusion Res. 2, S1054 (2007).