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000023002 1001_ $$0P:(DE-Juel1)130040$$aHuber, A.$$b0$$uFZJ
000023002 245__ $$aDevelopment of a Mirror-based Endoscope for Divertor Spectroscopy on JET with the new ITER-like Wall
000023002 260__ $$a[S.l.]$$bAmerican Institute of Physics$$c2012
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000023002 440_0 $$05309$$aReview of Scientific Instruments$$v83$$x0034-6748$$y10
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000023002 520__ $$aA new endoscope with optimised divertor view has been developed in order to survey and monitor the emission of specific impurities such as tungsten and the remaining carbon as well as beryllium in the tungsten divertor of JET after the implementation of the ITER-like wall in 2011. The endoscope is a prototype for testing an ITER relevant design concept based on reflective optics only. It may be subject to high neutron fluxes as expected in ITER. The operating wavelength range, from 390 nm to 2500 nm, allows the measurements of the emission of all expected impurities (W I, Be II, C I, C II, C III) with high optical transmittance (≥30% in the designed wavelength range) as well as high spatial resolution that is ≤2 mm at the object plane and ≤3 mm for the full depth of field (±0.7 m). The new optical design includes options for in situ calibration of the endoscope transmittance during the experimental campaign, which allows the continuous tracing of possible transmittance degradation with time due to impurity deposition and erosion by fast neutral particles. In parallel to the new optical design, a new type of possibly ITER relevant shutter system based on pneumatic techniques has been developed and integrated into the endoscope head. The endoscope is equipped with four digital CCD cameras, each combined with two filter wheels for narrow band interference and neutral density filters. Additionally, two protection cameras in the λ > 0.95 μm range have been integrated in the optical design for the real time wall protection during the plasma operation of JET.
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000023002 7001_ $$0P:(DE-Juel1)129976$$aBrezinsek, Sebastijan$$b1$$uFZJ
000023002 7001_ $$0P:(DE-Juel1)4596$$aMertens, Philippe$$b2$$uFZJ
000023002 7001_ $$0P:(DE-Juel1)130154$$aSchweer, Bernd$$b3$$uFZJ
000023002 7001_ $$0P:(DE-Juel1)130158$$aSergienko, Gennady$$b4$$uFZJ
000023002 7001_ $$0P:(DE-Juel1)130166$$aTerra, Alexis$$b5$$uFZJ
000023002 7001_ $$0P:(DE-HGF)0$$aArnoux, G.$$b6
000023002 7001_ $$0P:(DE-HGF)0$$aBalshaw, N.$$b7
000023002 7001_ $$0P:(DE-Juel1)6806$$aClever, Meike$$b8$$uFZJ
000023002 7001_ $$0P:(DE-HGF)0$$aEgner, S.$$b10
000023002 7001_ $$0P:(DE-HGF)0$$aEdlingdon, T.$$b9
000023002 7001_ $$0P:(DE-HGF)0$$aFarthing, J.$$b11
000023002 7001_ $$0P:(DE-HGF)0$$aHorton, L.$$b13
000023002 7001_ $$0P:(DE-HGF)0$$aHartl, M.$$b12
000023002 7001_ $$0P:(DE-HGF)0$$aKampf, D.$$b14
000023002 7001_ $$0P:(DE-HGF)0$$aKlammer, J.$$b15
000023002 7001_ $$0P:(DE-Juel1)130081$$aLambertz, Horst Toni$$b16$$uFZJ
000023002 7001_ $$0P:(DE-HGF)0$$aMatthews, G. F.$$b17
000023002 7001_ $$0P:(DE-HGF)0$$aMorlock, C.$$b18
000023002 7001_ $$0P:(DE-HGF)0$$aMurari, A.$$b19
000023002 7001_ $$0P:(DE-HGF)0$$aReindl, M.$$b20
000023002 7001_ $$0P:(DE-HGF)0$$aRiccardo, V.$$b21
000023002 7001_ $$0P:(DE-Juel1)130133$$aSamm, Ulrich$$b22$$uFZJ
000023002 7001_ $$0P:(DE-HGF)0$$aSanders, S.$$b23
000023002 7001_ $$0P:(DE-HGF)0$$aStamp, M.$$b24
000023002 7001_ $$0P:(DE-HGF)0$$aWilliams, J.$$b25
000023002 7001_ $$0P:(DE-HGF)0$$aZastrow, K. D.$$b26
000023002 7001_ $$0P:(DE-HGF)0$$aZauner, C.$$b27
000023002 7001_ $$0P:(DE-HGF)0$$aJET-EFDA Contributors$$b28
000023002 773__ $$0PERI:(DE-600)1472905-2$$a10.1063/1.4731759$$gVol. 83, p. 10D511-1$$p10D511-1$$q83<10D511-1$$tReview of scientific instruments$$v83$$x0034-6748$$y2012
000023002 8567_ $$uhttp://dx.doi.org/10.1063/1.4731759
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