The National Spherical Torus Experiment-Upgrade poloidal high-k scattering system pitch angle design modifications.
Rev Sci Instrum
; 93(10): 103509, 2022 Oct 01.
Article
em En
| MEDLINE
| ID: mdl-36319363
ABSTRACT
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.
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2022
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Article