Ray Trace Study for Visible Spectroscopy Reference System (VSRS) Diagnostics in ITER

Shin KAJITA, Maarten DE BOCK, Michel DESJARDINS, Robin BARNSLEY
2019 Plasma and Fusion Research  
The visible spectroscopy reference system (VSRS) diagnostic will be used to measure the continuum visible light emitted from the plasma in ITER. Because the field of view of the VSRS system is aligned to a hole on a blanket module with a retroreflector on the bottom, which will be shared with an interferometer measurement, it has a potential to be free from the stray light, which may disturb signals for optical diagnostics in ITER. In this study, performance of the stray light reduction in the
more » ... t reduction in the VSRS is investigated using a ray tracing simulation. We investigated the influences of the reflection property of the retroreflector and first mirror for the signal and stray light intensity.
doi:10.1585/pfr.14.1405042 fatcat:bvpbj5nkzvc2zdhto6utu5pg2e