Development of a three-wave far-infrared laser interferometry and polarimetry diagnostic system for the C-2W field-reversed configuration plasmas

B H Deng; M Rouillard; P Feng; M Beall; S Armstrong; J Castellanos; J Kinley; H K Leinweber; A Ottaviano; G Settles; G Snitchler; J Wells; S Ziaei; M Thompson; TAE Team

doi:10.1063/1.5036977

Development of a three-wave far-infrared laser interferometry and polarimetry diagnostic system for the C-2W field-reversed configuration plasmas

Rev Sci Instrum. 2018 Oct;89(10):10B109. doi: 10.1063/1.5036977.

Authors

B H Deng¹, M Rouillard¹, P Feng¹, M Beall¹, S Armstrong¹, J Castellanos¹, J Kinley¹, H K Leinweber¹, A Ottaviano¹, G Settles¹, G Snitchler¹, J Wells¹, S Ziaei¹, M Thompson¹; TAE Team¹

Affiliation

¹ TAE Technologies, Inc., Foothill Ranch, California 92610, USA.

PMID: 30399682
DOI: 10.1063/1.5036977

Abstract

Great advancements in modern field-reversed configuration (FRC) experiments motivated the development of a 14-chord three-wave far infrared (FIR) laser interferometry and polarimetry diagnostic system, which can provide simultaneous high temporal resolution measurements of density and Faraday rotation profiles with high accuracy. The unique challenges facing FIR diagnostics in high beta FRC plasmas are the extremely small (<0.5°) Faraday rotation angles, and severe laser beam refraction effects due to high density gradient and choice of long wavelength. The diagnostic system design and development are described with methods to overcome the challenges, and initial experimental data are also presented.