A5058304617- Laser-induced spectroscopy and plasma
- Fusion materials and technologies
- Magnetic confinement fusion research
- Ion-surface interactions and analysis
- Laser-Plasma Interactions and Diagnostics
- Nuclear Materials and Properties
- Metallurgical Processes and Thermodynamics
- Analytical chemistry methods development
- Laser Material Processing Techniques
- Surface Roughness and Optical Measurements
- Cultural Heritage Materials Analysis
- Nuclear reactor physics and engineering
- Plasma Diagnostics and Applications
- Spectroscopy and Chemometric Analyses
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Diamond and Carbon-based Materials Research
- Vibration and Dynamic Analysis
- Particle Dynamics in Fluid Flows
- Currency Recognition and Detection
- Solar and Space Plasma Dynamics
- Atomic and Molecular Physics
- Astro and Planetary Science
- Advanced Optical Imaging Technologies
- Optical Systems and Laser Technology
Southwestern Institute of Physics
2019-2025
Dalian University of Technology
2013-2021
Forschungszentrum Jülich
2016-2021
Chengdu University
2020-2021
Institut für Kälte-, Klima- und Energietechnik
2020
General Atomics (United States)
2017-2018
The diagnosis of the fuel retention and impurity deposition on plasma facing components (PFCs) is very important for monitoring plasma-wall interactions improving performance long-pulse operation tokamak devices. In this study, a remote in situ laser-induced breakdown spectroscopic (RIS-LIBS) system has been developed to be an effective routine method composition PFCs Experimental Advanced Superconducting Tokamak (EAST). RIS-LIBS can operated between EAST discharges via network control...
The ambient pressure influences the plume expansion and spectral emission, two regions are observed to distinguish enhanced plasma shielding effect.
Laser-induced breakdown spectroscopy (LIBS) is a powerful analytical tool for real-time diagnostics and detection of multiple elements deposited at the first wall magnetically confined plasma fusion devices. Recently, we have tested LIBS in our laboratory application to situ device EAST. In this study, applied polarization-resolved (PR-LIBS) reduce background continuum enhance resolution sensitivity LIBS. We used aluminium (Al) (as substitute Be) materials tungsten (W) molybdenum (Mo)...
Abstract W7-X completed its plasma operation in hydrogen with island divertor and inertially cooled test unit (TDU) made of graphite. A substantial set plasma-facing components (PFCs), including particular marker target elements, were extracted from the vessel analysed post-mortem. The analysis provided key information about underlying plasma–surface interactions (PSI) processes, namely erosion, transport, deposition as well fuel retention graphite components. net carbon (C) erosion...
The net erosion and deposition pattern of carbon from the Test Divertor Unit (TDU) stellarator W7-X was determined. Special target elements with marker layers consisting about 300 nm molybdenum 5–10 μm on top were used during operational phase OP 1.2a. thicknesses determined by elastic backscattering spectrometry (EBS) using 2.5 MeV protons before after plasma exposure laser-induced breakdown spectroscopy selected exposure. Scanning electron microscopy for investigating surface morphology...
The objective of the present study has been to evaluate potential applications picosecond laser-induced breakdown spectroscopy (ps-LIBS) in nuclear fusion devices.
Abstract A set of dedicated marker samples consisting fine-grain graphite as substrate, an interlayer 0.2–0.4 μ m molybdenum (Mo) employed marker, and a 5–10 thick carbon (C) layer on top were installed in Wendelstein 7-X (W7-X) to investigate locally the C erosion deposition. In this study, five individual tiles, vertical divertor element test unit half-module 50, exposed about 40 min plasma predominant standard magnetic configuration first year operation W7-X (OP1.2A), retrieved from...
Recently, a laser-induced breakdown spectroscopic (LIBS) system has been developed for in situ measurements of the chemical compositions plasma facing materials (PFMs) Experimental Advanced Superconducting Tokamak (EAST). In this study, LIBS system, which was used similar optical configuration to EAST, investigate spatial distribution PFM elements at 10−4 Pa. The aim study understand nature atoms or ions different plume and optimize signal background ratio diagnosis EAST. profiles signals C,...
Post-mortem methods cannot fulfill the requirement of monitoring lifetime plasma facing components (PFC) and measuring tritium inventory for safety evaluation. Laser-induced breakdown spectroscopy (LIBS) is proposed as a promising method in situ study fuel retention impurity deposition tokamak. In this study, an LIBS system was successfully established on EAST to investigate first wall without need removal tiles between discharges. Spectral lines D, H impurities (Mo, Li, Si, ... )...
A laser based method combined with spectroscopy, such as laser-induced breakdown spectroscopy (LIBS) and ablation (LIAS), is a promising technology for plasma-wall interaction studies. In this work, we report the development of in situ laser-based diagnostics (LIBS LIAS) assessment static dynamic fuel retention on first wall without removing tiles between during plasma discharges Experimental Advanced Superconducting Tokamak (EAST). The was measured after different conditioning methods daily...
In this work, laser-induced breakdown spectroscopy (LIBS) approach was applied to Experimental Advanced Superconducting Tokamak (EAST) device for in situ diagnosing the lithium-wall conditioning processes and Li-H/D co-deposition on inner board of first wall EAST. The fuel D impurities, such as H, Li, Ca, Na Mo were clearly observed surface wall. During Li-wall conditioning, Li signal intensity increases with increase time average deposited rate about 0.522 μm h–1. study Li-coating layer...
Abstract Wendelstein 7-X (W7-X) is an optimized stellarator with a 3-dimensional five-fold modular geometry. The plasma-wall-interaction (PWI) investigations in the complex 3D geometry of W7-X were carried out by situ spectroscopic observations, exhaust gas analysis and post-mortem measurements on large number plasma-facing components extracted after campaigns. showed that divertor strike line areas targets appeared to be major source carbon impurities. After multistep erosion deposition...
Laser induced breakdown spectroscopy (LIBS) was employed to find the depth profile of W‐coated CuCrZr alloy. Cathodic arc deposition method applied produce tungsten coating on The LIBS measurements were carried out by using a Nd:YAG laser at its fundamental wavelength (1064 nm) with various fluences. spectral intensity emitted from plasma material investigated for both elemental and depth‐profile analyses in terms linear correlation coefficient. Other surface characterization techniques...
The assessment of material deposition and fuel retention on Plasma Facing Components (PFCs) is primary importance for the steady-state operations future fusion devices. In this paper, an in situ diagnostic mapping distribution (IMap) a wide area PFCs HL-2M (Huan Liu Qi-2 Modification) developed. design, fabrication, integration, lab test IMap have been implemented. This system built with laser-induced breakdown spectroscopy technique which to determine constituents depth profile compositions...