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

doi:10.1063/1.4963311

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 journal › Article

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 language	English
Article number	11E559
Journal	Review of Scientific Instruments
Volume	87
Issue number	11
DOIs	https://doi.org/10.1063/1.4963311
Publication status	Published - Nov 1 2016
Externally published	Yes

All Science Journal Classification (ASJC) codes

Instrumentation

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10.1063/1.4963311

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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.",

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

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T1 - Beam emission spectroscopy with radially and poloidally elongated optical sightlines

AU - Ono, M.

AU - Ida, K.

AU - Kobayashi, T.

AU - Yoshinuma, M.

AU - Nakamura, Y.

AU - Kisaki, M.

AU - Nakano, H.

AU - Moon, C.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - 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.

AB - 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.

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