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Bolometers are indispensable diagnostic instruments for the International Tokamak Engineering Reactor (ITER). They allow control of the radiated power fraction and the position of the radiation maximum in the divertor, both key issues for the minimization of erosion and achievement of high performance. To fulfil the ITER requirement of a reasonably good tomographic reproduction of the divertor radiation distribution one needs not only a dense coverage with lines of sight in the divertor but also a substantial coverage of the main plasma, To achieve this, cameras will have to be placed into a harsh environment. The Joint European Torus (JET) detector based on a proprietary compact 4 channel bolometer which has been modified so that active cooling is not required leads the way towards the solution of these problems. Drawing from JET's experience with this new system a concept for ITER is outlined.

Additional information

Authors: REICHLE R ET AL, JET Joint Undertaking, Abingdon, Oxon (GB);FUCHS J C ET AL, Max-Planck-Institut für Plasma Physik, Garching bei München (DE);GOTTARDI N A C, CEC Luxembourg (LU)
Bibliographic Reference: Report: JET-P(95)51 EN (1995) 12pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon, OX14 3EA (GB)
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