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Liu, X.; Domier, C. W.; Dannenberg, J.; Zhu, Y.; Sirigiri, J. R.; Ren, Y.; Stratton, B.; Luhmann, N. C.

The National Spherical Torus Experiment-Upgrade poloidal high-k scattering system pitch angle design modifications

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  • Medientyp: E-Artikel
  • Titel: The National Spherical Torus Experiment-Upgrade poloidal high-k scattering system pitch angle design modifications
  • Beteiligte: Liu, X.; Domier, C. W.; Dannenberg, J.; Zhu, Y.; Sirigiri, J. R.; Ren, Y.; Stratton, B.; Luhmann, N. C.
  • Erschienen: AIP Publishing, 2022
  • Erschienen in: Review of Scientific Instruments, 93 (2022) 10
  • Sprache: Englisch
  • DOI: 10.1063/5.0099912
  • ISSN: 0034-6748; 1089-7623
  • Entstehung:
  • Anmerkungen:
  • Beschreibung: A 693 GHz, eight-channel, poloidal high-k (k refers to wavenumber) collective scattering system is under development for the National Spherical Torus Experiment-Upgrade device. It will replace the previous 280 GHz, five-channel, tangential scattering system to study high-k electron density fluctuations, thereby providing a measurement of the kθ-spectrum of both electron temperature gradient and ion temperature gradient modes. A tool is under development to calculate the wavenumber that exists in the presence of strong magnetic pitch angles. We use this tool to motivate a new receiver optical design for significantly improved performance, details of which are presented herein.