29th Symposium on Fusion Technology (SOFT 2016)

P4.056 Design & analysis process and implications on the optical performance

8 Sep 2016, 14:20

1h 40m

Foyer 2A (2nd floor), 3A (3rd floor) (Prague Congress Centre)

Board: 56

Poster D. Diagnostics, Data Acquisition and Remote Participation P4 Poster session

Speaker

Arnd Reutlinger (Kampf Telescope Optics)

Description

The H-alpha and Visible Spectroscopy Diagnostic shall measure spectrally, spatially and temporally resolved emission of ‎hydrogen isotopes and impurities in the ITER scrape-off layer. Four H-alpha diagnostic channels are designed to observe the plasma. They are located in 3 ‎port plugs: - Equatorial Port #11: TV (Top View): poloidal wide Field of View (FoV) covering the upper ‎part of the inner wall BV (Bottom View): poloidal wide FoV covering the lower ‎part of the inner wall - Equatorial Port #12: a tangential wide FoV channel covering the outer wall - Upper Port #02: a wide-‎FoV channel covering the divertor. The H alpha diagnostic in the equatorial port systems are scheduled for first plasma. In the current design status, all main interfaces have been iterated with the Port Integrator. All major subsystems of this complete end to end design for spectral and imaging channels are defined in detail and their functional compliance w.r.t. the system performance and structural integrity has been assessed by analyses. The first opto-mechanical design has been iterated between the optical and mechanical designer. The initial FEM analysis focusses among others on the determination of temperature profile, deformation of mirrors for system performance assessment and a first qualitative EM analysis. The output is then retrofitted into the mechanical model but also into the optical model to determine the impact on the optical performance. This step wise approach has been applied for the iteration between the different design and analysis disciplines such as optical design, mechanical design and structural, thermal and EM analysis on the other side. The design and analysis approach has recently been successfully verified by a vibration test of some of the components. The iterative analysis approach which has been followed, will be detailed here, highlighting the emphasis of each analysis phase.