A5028304616- Fusion materials and technologies
- Magnetic confinement fusion research
- Advanced Measurement and Metrology Techniques
- Superconducting Materials and Applications
- Optical Systems and Laser Technology
- Welding Techniques and Residual Stresses
- Optical measurement and interference techniques
- Astronomical Observations and Instrumentation
- Nuclear Materials and Properties
- Advanced Sensor Technologies Research
- Space exploration and regulation
- Laser-Plasma Interactions and Diagnostics
- Space Satellite Systems and Control
- Protein Structure and Dynamics
- Particle accelerators and beam dynamics
- Non-Destructive Testing Techniques
- Enzyme Structure and Function
- Metallurgy and Material Forming
- Aerospace Engineering and Energy Systems
- Magneto-Optical Properties and Applications
- Magnetic properties of thin films
- Advanced Numerical Analysis Techniques
- Particle Accelerators and Free-Electron Lasers
- Surface Roughness and Optical Measurements
- Image and Object Detection Techniques
Institute of Plasma Physics
2015-2024
Chinese Academy of Sciences
1996-2024
Hefei Institutes of Physical Science
2022-2024
Institute of Physics
2002-2004
European Science Foundation
2002
University of Bari Aldo Moro
2002
Technology and Engineering Center for Space Utilization
1996
Understanding tungsten melting behavior and its influence on plasma operation is one of the main concerns for ITER, which will be operated with a full divertor. Similar to actively cooled cassette modules have been successfully installed upper divertor in EAST stronger heat exhaust ability. However, an unexpected situ phenomenon has observed around strike point area both inner outer targets during recent campaigns. It was identified that such caused by leading edges, leads much high load...
Abstract Since the last IAEA-FEC in 2021, significant progress on development of long pulse steady state scenario and its related key physics technologies have been achieved, including reproducible 403 s long-pulse steady-state H-mode plasma with pure radio frequency (RF) power heating. A thousand-second time scale (∼1056 s) fully non-inductive high injected energy up to 1.73 GJ has also achieved. The EAST operational regime β P significantly extended ( H 98y2 > 1.3, ∼ 4.0, N 2.4 n e / GW...
In the initial stage of SAD phasing, essential point is to break intrinsic phase ambiguity. The presence two kinds information enables discrimination doublets from data prior density modification. One heavy atoms (anomalous scatterers), while other direct-methods relationships. former can be expressed by Sim distribution, latter Cochran distribution. Typically, only distribution has been used yield phases for subsequent However, it demonstrated that using based on product and distributions...
The next generation of magnetic confinement fusion experimental facility, the China Fusion Engineering Test Reactor (CFETR), is currently undergoing physical and engineering design. essential technology research development projects related to CFETR manufacture are in progress. As one demo for R&D, a 1/8 full-scaled vacuum vessel (VV), which aims solve key technologies forming, welding, measurement, assembly, etc future manufacturing process VV, was initiated 2015 by Institute Plasma Physics...
The 1/32 subsector of China Fusion Engineering Test Reactor vacuum vessel mockup is fully penetration welded together with four poloidal segments (PSs) which are made by forming and welding, so that each PS needs to machine the welding grooves. However, measurement results show there dimensional errors between design model has been made. This means grooves cannot be machined directly according model. So, method reverse engineering used achieve 3-D Based on this model, for CNC machining can...
In order to obtain accurate position of the inner key components in experimental advanced superconducting tokamak (EAST), a combined optical measurement method which is comprised laser tracker (LT) and articulated coordinate measuring machine (CMM) has been brought forward. LT, an instrument large range high accuracy, employed for establishing precision network EAST, CMM also EAST. The uncertainty analyzed by Unified Spatial Metrology Network (USMN) 0.20 mm at confidence probability 95.44%....
The probability formula of the direct-method SAD (single-wavelength anomalous diffraction) phasing proposed by Fan & Gu (1985, Acta Cryst. A41, 280–284) contains an error term which is related to lack-of-closure error. This used as a weighting function in phase derivation and subsequent calculation electron-density maps. Previously, there has been constant that had be determined empirically for each particular case. It found improper choice often leads failure phasing. problem resolved...
China Fusion Engineering Test Reactor (CFETR) vacuum vessel (VV), which is welded from forming shells and ribs, a toroidal double shell structure device. However, there are manufacturing errors in the welding processes that will lead to accumulative deviation of VV dimensions affect contour. In order reduce decentralize errors, surfaces parts measured then fit with least-squares method. According fitting result, new benchmarks reset form controlling points for next assembly. This paper about...
A precision spatial measurement network for EAST was studied and established base on the configuration Laser Tracker system. 34 fiducials in outside 64 inside were united one cylindrical coordinate by a laser tracker Unified Spatial Metrology Network (USMN) analysis showed that single point average uncertainty of this about 0.2mm, which can meet accuracy requirements EAST. combination method with system arm used assembly process device some researches environmental temperature influence have...
The major radius of the China Fusion Engineering Test Reactor (CFETR) is 7.2 m, and its minor 2.2 which are larger than those International Thermonuclear Experimental (ITER). That makes assembly CFETR machine more intricate challenging due to tool design, their stresses complex when weight key parts/components increases, especially cryostat vessel, vacuum vessel (VV), toroidal field (TF) magnets, poloidal (PF) thermal shielding (TS). Based on characteristics machine, a 45-deg sector (with...
The precision of dimensional measurement plays an important role in guaranteeing the assembly accuracy its internal components during upgrading phase EAST device. In this paper, experimental research and analysis were done based on three combined systems, combining Laser Tracker, flexible Measure ARM fiducials network, which are used for alignment process. error sources analyzed, e.g. temperature, gravity, welding, so on. And effective weight each kind source was estimated by simulation...
The on-site construction of the International Thermonuclear Experimental Reactor (ITER) Tokamak Assembly Contract 1 (TAC1) project has been carried out for about three years. In past years, multiple installation milestones were completed by Chinese Consortium (CNPE Consortium), such as Pit Ready, first feeder Coil Terminal Box (CTB) on final position, onsite superconducting joint was completed, etc. this paper, lessons learned from real ITER site kind Correction (CC) and Magnet Feeder...
Using a stereo camera system, new diagnostic for the safety factor of core plasma based on pellet ablation trail is applied Experimental Advanced Superconducting Tokamak (EAST). In EAST discharge No. 128 874, shattered injection system to inject neon into EAST. Since strong magnetic field in tokamaks binds ablated material, orientation same as local direction. Thus, from three-dimensional reconstruction result trail, q can be obtained. The motional Stark effect (MSE) determine profile this...
In this paper, a high precision measurement network was built with 64 fiducials placed on the EAST vacuum vessel(VV) inner surface for dimensional metrology of internal components. Unified Spatial Metrology Network(USMN) analysis showed that average uncertainty can be less than 0.15mm. The three coordinate flexible measuring system used to do dimension inspection in VV and leapfrog type transfer station method confirm there were no blind areas measurement. During whole assembly process...
Port structures are important parts of vacuum vessel (VV) in China Fusion Engineer Test Reactor (CFETR), which consists port stubs and extensions, mainly provides channels for the installation maintenance internal components, such as divertor blanket, interface auxiliary heating system, diagnostic pumping. A 1/8 VV sector mockup with is used to explore key manufacturing technology CFETR VV. Electron beam welding (EBW) process development introduced this article taking inner shell upper stub...