TY - JOUR
T1 - A Proposal to Evaluate Electron Temperature and Electron Density Fluctuations Using Dual Wavelength Emission Intensity Tomography in a Linear Plasma
AU - Nagashima, Yoshihiko
AU - Fujisawa, Akihide
AU - Yamasaki, Kotaro
AU - Shigeru, Inagaki
AU - Moon, Chanho
AU - Kin, Fumiyoshi
AU - Kawachi, Yuichi
AU - Arakawa, Hiroyuki
AU - Yamada, Takuma
AU - Kobayashi, Tatsuya
AU - Kasuya, Naohiro
AU - Kosuga, Yusuke
AU - Sasaki, Makoto
AU - Ido, Takeshi
N1 - Funding Information:
This work was supported by Grants-in-Aid for Specially Promoted Research (17H06089), Scientific Research (15H02335, 21H01066, 22K03576, 22H00120), and the research collaboration program between National Institute for Fusion Science and Kyushu University (NIFS22KIPH018). We would like to thank S.-I. Itoh, professor emeritus of Kyushu University, and K. Itoh, professor emeritus of National Institute for Fusion Science, for useful discussion on the experimental data.
Funding Information:
Acknowledgment This work was supported by Grants-in-Aid for Specially Promoted Research (17H06089), Scientific Research (15H02335, 21H01066, 22K03576, 22H00120), and the research collaboration program between National Institute for Fusion Science and Kyushu University (NIFS22KIPH018). We would like to thank S.-I. Itoh, professor emeritus of Kyushu University, and K. Itoh, professor emeritus of National Institute for Fusion Science, for useful discussion on the experimental data.
Publisher Copyright:
©2023 The Physical Society of Japan.
PY - 2023/3/15
Y1 - 2023/3/15
N2 - A procedure to calculate normalized electron temperature and electron density fluctuations using dual wavelength emission intensity tomography in a linear magnetized plasma is proposed. Expression of emission intensity is modeled as ϵk ∞ Tαke n2e where ϵk is emission intensity, Te is electron temperature, ne is electron density, k = 1 for ArI, and k = 2 for ArII. Using the model, normalized Te and ne fluctuations can be expressed as linear function of both the normalized emission intensity fluctuations. To calculate αk, we perform least squares method between real ϵk measured with a tomography system and artificial ϵk reconstructed using Te and ne measured with a Langmuir probe located downstream of the tomography system. The results show that α1 = 2.2 and α2 = 2.6, and normalized Te and ne fluctuations are preliminarily evaluated from emission intensity tomography data.
AB - A procedure to calculate normalized electron temperature and electron density fluctuations using dual wavelength emission intensity tomography in a linear magnetized plasma is proposed. Expression of emission intensity is modeled as ϵk ∞ Tαke n2e where ϵk is emission intensity, Te is electron temperature, ne is electron density, k = 1 for ArI, and k = 2 for ArII. Using the model, normalized Te and ne fluctuations can be expressed as linear function of both the normalized emission intensity fluctuations. To calculate αk, we perform least squares method between real ϵk measured with a tomography system and artificial ϵk reconstructed using Te and ne measured with a Langmuir probe located downstream of the tomography system. The results show that α1 = 2.2 and α2 = 2.6, and normalized Te and ne fluctuations are preliminarily evaluated from emission intensity tomography data.
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U2 - 10.7566/JPSJ.92.033501
DO - 10.7566/JPSJ.92.033501
M3 - Article
AN - SCOPUS:85154043998
SN - 0031-9015
VL - 92
JO - journal of the physical society of japan
JF - journal of the physical society of japan
IS - 3
M1 - 033501
ER -