A5070780243- Particle accelerators and beam dynamics
- Magnetic confinement fusion research
- Plasma Diagnostics and Applications
- Fusion materials and technologies
- Superconducting Materials and Applications
- Chronic Obstructive Pulmonary Disease (COPD) Research
- Smoking Behavior and Cessation
- Particle Accelerators and Free-Electron Lasers
- Nuclear Materials and Properties
- Silicon Carbide Semiconductor Technologies
- Neonatal Respiratory Health Research
- Air Quality and Health Impacts
- Silicon and Solar Cell Technologies
- Metal and Thin Film Mechanics
- Laser-Plasma Interactions and Diagnostics
- Ion-surface interactions and analysis
Huazhong University of Science and Technology
2024
Tongji Hospital
2024
Institute of Plasma Physics
2015-2023
Chinese Academy of Sciences
2010-2023
Hefei Institutes of Physical Science
2023
Background Maternal smoking during pregnancy (MSDP) is a known risk factor for offspring developing chronic obstructive pulmonary disease (COPD), but the underlying mechanism remains unclear. Objective This study aimed to explore whether increased COPD associated with MSDP could be attributed tobacco dependence (TD). Methods case-control used data from nationwide cross-sectional China Pulmonary Health study, controls matched age, sex, and status. TD was defined as within 30 minutes of...
Deuterium neutral beam injection is playing an important role in magnetic confinement fusion research at present. A preliminary result of species obtained by using Doppler shift spectroscopy on the Experimental Advanced Superconducting Tokamak (EAST) injector. Typical spectral experimental results are presented to illustrate performance ion source. The show that full energy particle up 80%—reaching its design specifications.
The long-pulse power-supply system equipped for the 4 MW beam-power ion source is comprised of three units at ASIPP (Institute Plasma Physics, Chinese Academy Sciences): one neutral-beam test stand and two EAST injectors (NBI-1 NBI-2, respectively). Each power supply consists low voltage high current DC supplies plasma generation source, accelerator grid system. operation range NB about 80 percent design value, which safe stable range. At stand, a hydrogen beam with pulse 150 s, 1.5 energy...
A radio frequency (RF) ion source was developed for neutral beam injector in Institute of Plasma Physics, Chinese Academy Sciences (ASIPP). cylindrical driver based RF plasma tested and optimized long pulse operation. Recently, the achieved 1000 s stable discharge with power 35 kW pressure 0.7 Pa first time. The heat loading on each components such as Faraday shield (FS), coil expansion chamber measured by water flow calorimeter system. experiment results showed that FS is component highest...
This research applies experimental measurements and NUBEAM, ONETWO TRANSP modules to investigate the shine-through (ST) loss ratio beam heating percentage of neutral injection on EAST. Measurements simulations confirm that ST increases linearly with energy, decreases exponentially plasma density. Moreover, using multi-step fitting method, we present analytical quantitative expressions percentage, which are valuable for high parameter long-pulse experiments
Neutral beam injection is an effective plasma heating and current drive method for magnetic confinement devices. For supporting the high-confinement operation of fully superconducting tokamak EAST, a high-power long-pulse neutral foreseen to be injected into EAST. To achieve such mission, most important task develop qualified ion source which can launch positive pulse length up 100 s with power larger than 2 MW. During research development on EAST source, several key issues have been...
The neutral beam injector (NBI) system was designed and developed mainly for the plasma heating on Experimental Advanced Superconducting Tokamak (EAST). high power ion source is key part of NBI. A hot cathode used EAST-NBI. conditioned test bed with hydrogen gas achieved parameters. deuterium when it moved to main performance EAST presented in this paper. highest 4.5 MW NBI-1 2.75 NBI-2 achieved. total about MW. long pulse 100 s injected into too.
Neutral beam injection has been recognized as one of the most effective means for plasma heating. According to research plan EAST physics experiment, two sets neutral injector (NBI) were built and operational in 2014. The paper presents development diagnosis system NBI latest experiment results obtained on test-stand EAST-NBI-1 2. show that optimal divergence angle is (0.62°, 1.57°) full energy particle up 77%. They indicate work properly all targets reach or almost design targets. All these...
Neutral beam injection heating is one of the main auxiliary methods in controllable nuclear fusion research. In EAST neutral injector, a water flow calorimetry (WFC) system applied to measure heat load on electrode ion source and loading components beamline. Due loss return pipe, there are some measuring errors for current WFC system. this paper, were measured experimentally analyzed theoretically, which lay basis exact calculation power deposition distribution neutralization efficiency.
The Comprehensive Research Facility for Fusion Technology (CRAFT) is a large scientific programme that preferentially deployed the construction of major national science and technology infrastructures. A negative ion-based neutral beam injector (NNBI) with energy 400 keV, power 2 MW duration 100 s one projects. radio frequency (RF) based source was designed CRAFT NNBI system. In order to understand physics pre-study engineering problems RF sources, prototype single driver developed....
<sec> <title>BACKGROUND</title> Maternal smoking during pregnancy (MSDP) is a known risk factor for offspring developing chronic obstructive pulmonary disease (COPD), but the underlying mechanism remains unclear. </sec> <title>OBJECTIVE</title> This study aimed to explore whether increased COPD associated with MSDP could be attributed tobacco dependence (TD). <title>METHODS</title> case-control used data from nationwide cross-sectional China Pulmonary Health study, controls matched age, sex,...