Beam emission spectroscopy with radially and poloidally elongated optical sightlines

M. Ono, K. Ida, T. Kobayashi, M. Yoshinuma, Y. Nakamura, M. Kisaki, H. Nakano, C. Moon

Research output: Contribution to journalArticle

Abstract

Beam emission spectroscopy is widely used as local density fluctuation measurement of fusion plasmas. We have installed a beam emission spectroscopy system in the large helical device (LHD) with radially and poloidally elongated optical configuration to enhance both signal-to-noise ratio and wavenumber sensitivity in radial and poloidal directions. The calculation considering the integral effect of the line of sight showed the radially and poloidally elongated sightlines have increased sensitivity compared with the square shaped bundle design of the same sampling area.

Original languageEnglish
Article number11E559
JournalReview of Scientific Instruments
Volume87
Issue number11
DOIs
Publication statusPublished - Nov 1 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Instrumentation

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