Preliminary design of optical emission spectroscopic diagnostics for Thailand Tokamak 1 (TT-1)

Authors

  • N. Somboonkittichai Department of Physics, Faculty of Science, Kasetsart University, Chatuchak, 10900 Bangkok, Thailand
  • P. Nikapul Department of Physics, Faculty of Science, Kasetsart University, Chatuchak, 10900 Bangkok, Thailand
  • E. Pongophas Division of Physics, Faculty of Science and Technology, Thammasat University, Khlongluang, 12121 Pathumthani, Thailand
  • W. Wongkokua Division of Physics, Faculty of Science and Technology, Thammasat University, Khlongluang, 12121 Pathumthani, Thailand
  • S. Chomkokard Department of Physics, Faculty of Science, Kasetsart University, Chatuchak, 10900 Bangkok, Thailand,
  • S. Chotikaprakhan Department of Physics, Faculty of Science, Kasetsart University, Chatuchak, 10900 Bangkok, Thailand,
  • P. Kijamnajsuk Department of Physics, Faculty of Science, Kasetsart University, Chatuchak, 10900 Bangkok, Thailand,
  • C. Luengviriya Department of Physics, Faculty of Science, Kasetsart University, Chatuchak, 10900 Bangkok, Thailand,
  • A. Tamman Center of Advanced Nuclear Technology, Thailand Institute of Nuclear Technology (Public Organization), Ongkarak, 26120 Nakhon Nayok, Thailand

DOI:

https://doi.org/10.14311/ppt.2025.2.90

Keywords:

edge tokamak plasma, optical emission spectroscopy (OES), Thailand Tokamak 1 (TT-1), line emission, UV-visible spectrometer

Abstract

Thailand Tokamak 1 (TT-1), which employs a circular poloidal cross-section, has been operated with a set of poloidal limiters since its installation was completed in June 2023. This device currently lacks essential plasma diagnostics and auxiliary heating systems. At present, light emission is observed only by a visible camera. Although intense line emission has been detected, it remains poorly characterized. To support further research on impurity transport in TT-1, even in Ohmic mode, spectroscopic diagnostics are necessary. This study reports on the development progress of optical emission spectroscopic (OES) diagnostics, including the preliminary design, fabrication, and optical calculations.

References

A. Tamman and N. Somboonkittichai. The plan of diagnostic systems for the first phase of thailand tokamak 1. Plasma and Fusion Research, 15:2402067–2402067, 2020. doi:10.1585/pfr.15.2402067.

L. Gao, G. Zhuang, Z. J. Wang, et al. Recent progress of the HCN interferometer on J-TEXT tokamak. Review of Scientific Instruments, 83(10):10E303, 06 2012. doi:10.1063/1.4728310.

Y. Luo, F. Ding, L. Wang, et al. Investigation of multifaceted asymmetric radiation from the edge (marfe) with impurity injection from the upper divertor on the experimental advanced superconducting tokamak. Plasma Physics and Controlled Fusion, 62(7):075005, may 2020. doi:10.1088/1361-6587/ab8a62.

S. Banerjee, V. Kumar, M. B. Chowdhuri, et al. Space-and time-resolved visible-emission spectroscopy of aditya-tokamak discharges using multi-track spectrometer. Measurement Science and Technology, 19(4):045603, feb 2008. doi:10.1088/0957-0233/19/4/045603.

S. Banerjee, J. Ghosh, R. Manchanda, et al. Observations of hα emission profiles in aditya tokamak. J. Plasma Fusion Res, 9:29–32, 2010.

URL: https://andor.oxinst.com/products/kymera-and-shamrock-spectrographs/kymera-193i.

URL: https://andor.oxinst.com/products/idus-spectroscopy-cameras/idus-401.

URL: https://www.thorlabs.com.

URL: https://www.lesker.com/

URL: http://www.cdhoptics.com/

Downloads

Published

2025-09-10

Issue

Vol. 12 No. 2 (2025)

Section

Articles

License

Copyright (c) 2025 N. Somboonkittichai, P. Nikapul, E. Pongophas, W. Wongkokua, S. Chomkokard, S. Chotikaprakhan, P. Kijamnajsuk, C. Luengviriya, A. Tamman

Creative Commons License

This work is licensed under a Creative Commons Attribution 3.0 Unported License.

Authors who publish with this journal agree to the following terms:

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).