Evaluation of ambipolar potential barrier in the gas dynamic trap by Doppler spectroscopy

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Evaluation of ambipolar potential barrier in the gas dynamic trap by Doppler spectroscopy. / Lizunov, Andrej ; Maximov, Vladimir; Sandomirsky, Andrey.

In: Nuclear Fusion, Vol. 62, No. 7, 076003, 07.2022.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{df577f732f7847f08ad30d7bba1c0793,

title = "Evaluation of ambipolar potential barrier in the gas dynamic trap by Doppler spectroscopy",

abstract = "The recently developed Doppler spectroscopy diagnostic has been used to evaluate the height of the ambipolar potential barrier forming in the gas dynamic trap (GDT) plasma between the central cell and the region with a large magnetic expansion ratio beyond the mirror. The diagnostic technique based on the gas jet charge exchange target, allowed to measure the potential profile along the line of sight covering the radial range from the axis to the limiter. The on-axis potential drop was found to be 2.6 ÷ 3.1 in units of the central plane electron temperature, which supports the existing theoretical understanding of suppression of electron thermal conductivity in the GDT expander. ",

keywords = "ambipolar potential, gas dynamic trap, magnetic mirror, plasma confinement, spectroscopy",

author = "Andrej Lizunov and Vladimir Maximov and Andrey Sandomirsky",

note = "Publisher Copyright: {\textcopyright} 2022 IAEA, Vienna.",

year = "2022",

month = jul,

doi = "10.1088/1741-4326/ac4ace",

language = "English",

volume = "62",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "IOP Publishing Ltd.",

number = "7",

}

RIS

TY - JOUR

T1 - Evaluation of ambipolar potential barrier in the gas dynamic trap by Doppler spectroscopy

AU - Lizunov, Andrej

AU - Maximov, Vladimir

AU - Sandomirsky, Andrey

PY - 2022/7

Y1 - 2022/7

N2 - The recently developed Doppler spectroscopy diagnostic has been used to evaluate the height of the ambipolar potential barrier forming in the gas dynamic trap (GDT) plasma between the central cell and the region with a large magnetic expansion ratio beyond the mirror. The diagnostic technique based on the gas jet charge exchange target, allowed to measure the potential profile along the line of sight covering the radial range from the axis to the limiter. The on-axis potential drop was found to be 2.6 ÷ 3.1 in units of the central plane electron temperature, which supports the existing theoretical understanding of suppression of electron thermal conductivity in the GDT expander.

AB - The recently developed Doppler spectroscopy diagnostic has been used to evaluate the height of the ambipolar potential barrier forming in the gas dynamic trap (GDT) plasma between the central cell and the region with a large magnetic expansion ratio beyond the mirror. The diagnostic technique based on the gas jet charge exchange target, allowed to measure the potential profile along the line of sight covering the radial range from the axis to the limiter. The on-axis potential drop was found to be 2.6 ÷ 3.1 in units of the central plane electron temperature, which supports the existing theoretical understanding of suppression of electron thermal conductivity in the GDT expander.

KW - ambipolar potential

KW - gas dynamic trap

KW - magnetic mirror

KW - plasma confinement

KW - spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=85129424804&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/44a4c197-f733-34d0-b018-b6127538ce81/

U2 - 10.1088/1741-4326/ac4ace

DO - 10.1088/1741-4326/ac4ace

M3 - Article

AN - SCOPUS:85129424804

VL - 62

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - 7

M1 - 076003

ER -

ID: 36060794