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A terahertz solid-state source interferometer-polarimeter designed for long pulse discharges on EAST.
- Source :
-
The Review of scientific instruments [Rev Sci Instrum] 2024 Jul 01; Vol. 95 (7). - Publication Year :
- 2024
-
Abstract
- A 0.65 THz Solid-state Source Interferometer-Polarimeter (SSIP) with vertical viewing has been installed for line-integrated density and Faraday rotation measurements on Experimental Advanced Superconducting Tokamak (EAST). The SSIP utilizes three independent solid-state diode sources based on frequency multiplier (X48) to provide the probing beam at a fixed frequency of 0.65 THz with ∼2.5 mW output power, which provide an Intermediate Frequency (IF) with wide range, and the highest IF is up to ∼10 MHz. The mixers optimized for high sensitivity, ∼750 mV/mW, are used in the SSIP system, which permits multichannel interferometer-polarimeter on EAST with a low phase noise. The resolution of the integrated density is 3.3 × 1017 m-2, and the Faraday rotation is about 1.5°. The density measurement has been implemented with IF ∼0.85 MHz, in a plasma with plasma current ∼300 kA on EAST. The line-averaged density, 3.5 × 1019 m-3, measured by the SSIP shows good agreement with the results measured by the POlarimeter-INTerferometer (POINT) system and the CO2 dispersion interferometer system in the same discharge.<br /> (© 2024 Author(s). Published under an exclusive license by AIP Publishing.)
Details
- Language :
- English
- ISSN :
- 1089-7623
- Volume :
- 95
- Issue :
- 7
- Database :
- MEDLINE
- Journal :
- The Review of scientific instruments
- Publication Type :
- Academic Journal
- Accession number :
- 38953719
- Full Text :
- https://doi.org/10.1063/5.0215747