The x-ray imaging crystal spectrometer (XICS) for Korea Superconducting Tokamak Advanced Research is applied to measure multiple atomic states, such as Ar16+, Ar17+, W43+, and W44+, with keeping the same spectrometer configuration because all spectra are well separated within the detector boundary. The first experimental results from the recently installed full W tiles in the lower divertor utilizing the XICS are discussed.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1063/5.0210736 | DOI Listing |
Rev Sci Instrum
September 2024
National Institute of Fusion Science, 322-6 Oroshi-cho, Toki City, Gifu, Japan.
Due to the increasing demands for active plasma control operations, in situ diagnostics are highly sought after. Tungsten plasma-facing components have been utilized in the Korea Superconducting Tokamak Advanced Research (KSTAR) lower divertor since the 2023 campaign. Plasma radiation is a key parameter for plasma control, especially in radiation front control experiments.
View Article and Find Full Text PDFRev Sci Instrum
August 2024
The College of William and Mary, Williamsburg, Virginia 23188, USA.
The LLAMA (Lyman Alpha Measurement Apparatus) pinhole camera diagnostic had previously been deployed on DIII-D to measure radial profiles of the Lyman-α (Ly-α) deuterium neutral line brightness across the plasma boundary in the lower chamber to infer neutral deuterium density and ionization rate profiles. This system has recently been upgraded with a new diagnostic head, named ALPACA, that also encloses two pinhole cameras and duplicates the LLAMA views in the upper chamber. Similar to LLAMA, ALPACA provides two times 20 lines of sight, viewing the plasma edge on the inboard and outboard sides with a radial resolution of ∼2.
View Article and Find Full Text PDFRev Sci Instrum
August 2024
Department of Energy Systems Research, Ajou University, 206 Worldcup-ro, Suwon 16499, South Korea.
Rev Sci Instrum
July 2024
KSTAR Research Center, Korea Institute of Fusion Energy, Daejeon 34113, South Korea.
Last year, the KSTAR divertor material was changed from carbon to tungsten tiles. An optimized collection optic design for divertor Thomson scattering diagnostics in KSTAR was conducted for electron temperature (1-100 eV) and electron density (1 × 1018-1 × 1019 m-3) profile diagnostics. This diagnostic system will utilize a 1064 nm Nd:YAG laser directly from the K-top port toward the beam dump located at K-bottom, while collecting scattered light from five spatial points in the divertor area via collection optics situated in the j-middle port.
View Article and Find Full Text PDFRev Sci Instrum
July 2024
Korea Institute of Fusion Energy, 169-148 Gwahangno, Yueseong-gu, Daejeon 34133, Republic of Korea.
The x-ray imaging crystal spectrometer (XICS) for Korea Superconducting Tokamak Advanced Research is applied to measure multiple atomic states, such as Ar16+, Ar17+, W43+, and W44+, with keeping the same spectrometer configuration because all spectra are well separated within the detector boundary. The first experimental results from the recently installed full W tiles in the lower divertor utilizing the XICS are discussed.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!