Speaker
Hans Meister
(ITER Technology & Diagnostics)
Description
The ITER bolometer diagnostic shall provide the measurement of the total radiation emitted from the plasma, a part of the overall energy balance. About 500 lines-of-sight (LOS) will be installed in ITER observing the whole plasma from many different angles to enable reliable measurements and tomographic reconstructions of the spatially resolved radiation profile. The LOS are bundled in up to 100 individual cameras, which will be located behind blanket modules on the vacuum vessel wall, in five divertor cassettes, in two upper port plugs and in one equatorial port plug. For all major design issues solutions have been elaborated and will be presented:
During a German nationally funded project generic designs for all major diagnostic components have been developed in close collaboration between IPP and its partners with the aim to enable reliable measurements under the harsh loads of the ITER environment. The design of collimators has been developed and tested on prototypes to provide an exact definition of the required viewing cones of about 1° while reliably reducing reflections, stray light and microwave stray radiation. A 3D-shaped ceramic printed circuit board is proposed to hold the sensor, orient it as desired, and provide good thermal contact as well as the bridge for electrically connecting external signal cables to the meanders on the sensor. The design of the camera housing for vacuum vessel and divertor cameras has been optimized for improved management of the thermal heat flow, supported by tests defining material properties and verifying analysis. Additionally, methods have been developed to derive the main design parameters of cameras and decide if pin-hole or collimator type is more advantageous.
Recently, the system-level design phase within a framework partnership agreement with F4E started and uses the achieved results to define interfaces and designs for the specific locations in ITER.
Co-authors
Adam Pataki
(Wigner Research Centre for Plasmaphysics, Budapest, Hungary)
Curt Gliss
(ITER Technology & Diagnostics, Max-Planck-Institut for Plasmaphysics, Garching b. München, Germany)
Florian Penzel
(ITER Technology & Diagnostics, Max-Planck-Institut for Plasmaphysics, Garching b. München, Germany)
Gabor Nadasi
(Wigner Research Centre for Plasmaphysics, Budapest, Hungary)
Hans Meister
(ITER Technology & Diagnostics, Max-Planck-Institut for Plasmaphysics, Garching b. München, Germany)
Jurgen Koll
(ITER Technology & Diagnostics, Max-Planck-Institut for Plasmaphysics, Garching b. München, Germany)
L. C. Ingesson
(Fusion for Energy, Barcelona, Spain)
Mario Kannamuller
(ITER Technology & Diagnostics, Max-Planck-Institut for Plasmaphysics, Garching b. München, Germany)
Roger Reichle
(ITER Organization, Saint-Paul-lez-Durance, France)
Till Sehmer
(ITER Technology & Diagnostics, Max-Planck-Institut for Plasmaphysics, Garching b. München, Germany)
