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Development of a mirror-based endoscope for divertor spectroscopy on JET with new ITER-like wall (invited)
A. Huber, S. Brezinsek, Ph. Mertens, B. Schweer, G. Sergienko, A. Terra, G. Arnoux, N. Balshaw, M. Clever, T. Edlingdon, S. Egner, J. Farthing, M. Hartl, L. Horton, D. Kampf, J. Klammer, H.T. Lambertz, G.F. Matthews, C. Morlock, A. Murari, M. Reindl, V. Riccardo, U. Samm, S. Sanders, M. Stamp, J. Williams, K.D. Zastrow, C. Zauner, and JET-EFDA Contributors
There have been major advances in the history of JET, namely the installation of the ITER-like wall in 2010-2011. In this new upgrade, an endoscope with optimised divertor view has been developed in order to analyse the emission of specific impurities in the tungsten divertor of JET. Initial results of the new endoscope are discussed and show that transmittance for wavelengths, λ > 500 nm, and resolution requirements (≤ 3mm) have been met.
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