5-9 September 2016
Prague Congress Centre
Europe/Prague timezone

P1.054 Diamond Window Diagnostics Concepts For Fusion Reactors - Updates of the Design

5 Sep 2016, 14:20
1h 40m
Foyer 2A (2nd floor), 3A (3rd floor) (Prague Congress Centre)

Foyer 2A (2nd floor), 3A (3rd floor)

Prague Congress Centre

5. května 65, Prague, Czech Republic
Board: 54
Poster D. Diagnostics, Data Acquisition and Remote Participation P1 Poster session

Speaker

Francesco Mazzocchi (IAM- AWP)

Description

The future nuclear fusion power plants will require Electron Cyclotron Heating and Current Drive (ECH&CD) systems to heat up and stabilize the plasma inside the vacuum vessel. One of the key components of such systems is the Chemical Vapor Deposition (CVD) diamond window. The purpose of this device is to act as vacuum and tritium boundary while providing a high microwave transparency with minimal reflectivity. Although suited for high power microwave operation, the windows shall be internally monitored in order to properly ensure the ECH system efficiency and safety. In this paper, the latest assessment study on a set of diagnostics to be part of the window assembly is shown. The required diagnostics include arc and tritium detection, microwave stray radiation (perpendicular to the main beam and generated by cracks in the windows), pressure and disk temperature measurements. The devices must have a compact, simple and flexible layout, with a rugged design, to maximize serviceability and durability. When multiple options are possible for the some of the diagnostic systems (e.g., scintillation devices vs solid state detectors for tritium detection), tradeoffs were assessed. To accommodate the diagnostics previously mentioned, a new design for the window housing was developed. As the design of the original diamond window assembly underwent further development since the beginning of this project, an update of the general layout was required. The new layout presented here integrates the updates of the windows assembly with those to the diagnostics. To validate the concepts, a test bench was developed to carry out measurements under conditions similar to the operative ones.

Co-authors

Andreas Meier (IAM- AWP, Karlsruhe Institute Of Technology, Eggenstein Leopoldshafen, Germany) Dirk Strauss (IAM- AWP, Karlsruhe Institute Of Technology, Eggenstein Leopoldshafen, Germany) Francesco Mazzocchi (IAM- AWP, Karlsruhe Institute Of Technology, Eggenstein Leopoldshafen, Germany) Gaetano Aiello (IAM- AWP, Karlsruhe Institute Of Technology, Eggenstein Leopoldshafen, Germany) Sabine Schreck (IAM- AWP, Karlsruhe Institute Of Technology, Eggenstein Leopoldshafen, Germany) Theo Schere (IAM- AWP, Karlsruhe Institute Of Technology, Eggenstein Leopoldshafen, Germany)

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