ICFDT7 - 7th International Conference on Frontier in Diagnostic Technologies

Session

Special session on diagnostics of EAST Tokamak

23 Oct 2024, 14:55

43. First observation of full radial profile of Zeff using high-performance visible spectrometer in EAST tokamak

Jiuyang Ma (Institute of Plasma Physics Chinese Academy Of Sciences)

23/10/2024, 14:55

Diagnostic for Fusion Machines

Short Talk

The effective ion charge, Zeff, is a key parameter in magnetic confinement fusion plasma, quantifying the average ionization state of impurities and is critical for assessing plasma impurity level and radial impurity distribution. In ITER tokamak, the expected Zeff is around 1.8, with permissible variations limited to ±0.2. The visible bremsstrahlung measurement is a useful tool for measuring...

38. Design of Microwave Reflectometry for Helimak

Fei Wen (Hefei Institutes of Physical Science, The Chinese Academy of Scieneces)

23/10/2024, 15:05

Diagnostic for Fusion Machines

Short Talk

Helimak is a plasma experimental device with a helical magnetic field and a toroidal vacuum vessel. The structure of Helimak is similar to that of a tokamak, which make it possible to simulate a tokamak-like in-vessel environment. Low operating costs make it a validation platform for wall conditioning technology of fusion devices.
Microwave reflectometry is a widely used plasma density...

40. A novel terahertz line array detection scheme of solid-source interferometer system on EAST

Huihui Yan (Institute of Plasma Physics, Hefei Institutes of Physical Science)

23/10/2024, 15:15

Diagnostic for Density and Temperature

Short Talk

Abstract—A vertical single channel 0.65THz solid-source interferometer (SSI) has been established on Experimental Advanced Superconducting Tokamak (EAST) for real-time electron density measurement and feedback. A novel terahertz line array detection scheme is proposed to improve the spatial resolution of the SSI. By employing high-power solid-state diode sources and an AlGaN/GaN line array...

46. Preliminary Results and Analysis of a Tangential TV Thomson Scattering Diagnostic System on EAST

Yuanxiu Zhu (Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences)

23/10/2024, 15:25

Diagnostic for Fusion Machines

Short Talk

High spatial resolution edge Thomson scattering diagnostic is important for fusion research. The electron temperature and density profiles of plasma are basic parameters in the study of Tokamak plasma physics, so the development of high spatiotemporal resolution edge Thomson scattering diagnostic has been carried out in many major tokamak devices, such as DIII-D[1], JT-60U[2], JET[3], EAST[4],...

58. Extreme Ultraviolet Spectrometers for fast observation of high-Z impurity line emissions and their density radial profiles in Experimental Advanced Superconducting Tokamak

Yunxin Cheng

23/10/2024, 15:35

Short Talk

The plasma-facing components (PFC) in EAST tokamak are primarily composed of metallic materials, including tungsten divertor and limiter, titanium-zirconium-molybdenum (TZM) alloy first wall, copper antennas, and various components made of iron alloys. Consequently, multiple high-Z impurity species including Fe, Cu, Mo, W, will exist in EAST plasma due to inevitably plasma-wall interaction...

92. Research on Wavelength Calibration and Data Processing Algorithms of extreme ultraviolet (EUV) Spectrum

Zhengwei Li

23/10/2024, 15:45

Spectroscopy

Short Talk

High-Z materials are used as plasma facing components due to excellent material properties in fusion devices. However, impurities are inevitably induced in plasma discharge by plasma-wall interactions. The presence of these impurities can lead to increased energy loss and degradation of plasma confinement. Therefore, the study of impurity behavior based on impurity spectral diagnosis is of...

107. Reconfigurable Architecture of Real-Time Data Processing for Laser-aided Electron Density Diagnostics on EAST Tokamak

Yuan Yao (ASIPP, Chinese Academy of Sciences)

23/10/2024, 15:55

Diagnostic for Fusion Machines

Short Talk

This paper presents a reconfigurable architecture designed for real-time data processing in tokamak diagnostics. Through the deployment and application on various laser-aided electron density diagnostics, including the HCN interferometer, POINT, solid-state source interferometer, and carbon dioxide dispersion interferometer, the architecture has been validated to meet the real-time data...