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Infrared TV measurement of fast ion loss on JT‐60U

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4 Author(s)
Tobita, K. ; Naka Fusion Research Establishment, Japan Atomic Energy Research Institute, Naka‐machi, Naka‐gun, Ibaraki‐ken 311‐01, Japan ; Neyatani, Y. ; Kusama, Y. ; Takeuchi, H.

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Toroidal field (TF) ripple transport, wave‐particle interaction, and large magnetohydrodynamic modes can enhance fast ion losses and result in localized heat deposition on the first wall. Two‐dimensional (2D) thermal measurement on the first wall provides useful information concerning these fast ion behaviors. In this article, we focus on the application of the 2D measurement with an infrared TV camera to TF ripple loss study. The content is (1) the 2D heat flux profile on the wall due to ripple loss, (2) the effects of the radial electric field, and (3) the ICRF effect on TF ripple loss. These experimental data demonstrate a great potential of infrared thermography in fast ion behavior study. © 1995 American Institute of Physics.

Published in:

Review of Scientific Instruments  (Volume:66 ,  Issue: 1 )