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Sep 17 – 22, 2023
Victoria Conference Centre
Canada/Pacific timezone
Fairmont Empress (Conference Hotel): All reservations must be made by phone or email now. https://icis2023.triumf.ca/accommodations.html

Evaluation of H-/D- Density Using Langmuir Probe Measurement in a Cs Seeded Negative Ion Source

Not scheduled
20m
Victoria Conference Centre

Victoria Conference Centre

Poster (by default) Beam Formation, Extraction, Transport, and Diagnostics Tuesday

Speaker

Engrhyt Rattanawongnara (SOKENDAI university)

Description

Negative-ion density measurement in negative-ion sources is still in demand for improving the design and efficiency of the sources [1,2].
A new analysis method called the 'electron reduction Langmuir probe model' is developed for an area that cannot use a laser-related measurement [3], such as inside the extraction hole.
A validity check of the new analysis is performed in hydrogen and deuterium plasma for utilizing and improving the technique.
Langmuir probe-assisted photodetachment [4,5,6] calibrated with cavity ring down line integral [7] is a standard for negative ion density.
A linear correlation between negative ion density from the electron reduction method and the standard shows that the new analysis method can be a replacement with careful calibration.
[1] M. Bacal, Plasma Sources Sci. Technol. 2, 190 (1993)
[2] K. Tsumori and M. Wada, New J. Phys. 19 045002 (2017).
[3] E. Rattanawongnara et al., Plasma and Fusion Research 18, 1401020 (2023).
[4] M. Bacal, Rev. Sci. Instrum. 71, 3981 (2000).
[5] N. Oudini et al., Plasma Sources Sci. Technol. 28, 065016 (2019).
[6] N. Sirse et al., Plasma Sources Sci. Technol. 20, 055003 (2011).
[7] S. Masaki et al., Rev. Sci. Instrum. 91, 013512 (2020).

Email Address engrhyt.rattanawongnara@nifs.ac.jp
I have read the Code of Conduct to attend ICIS2023. Yes

Primary author

Engrhyt Rattanawongnara (SOKENDAI university)

Co-authors

Prof. Haruhisa Nakano (National Institute of Fusion ScienceNIFS) Prof. Kenichi Nagaoka (National Institute of Fusion ScienceNIFS) Prof. Masaki Osakabe (SOKENDAI university) Prof. Takeiri Yasuhiko (National Institute of Fusion ScienceNIFS) Prof. Tsumori Katsuyoshi (National Institute of Fusion ScienceNIFS)

Presentation materials

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