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Fusion of Multi-Pinched Plasma Beams Converging with spatial symmetry

Plasma Science and Technology 2015年第7期17卷 552-559页

作者：苗峰曾宪俊邓柏权 Southwest University for Nationalities HOPE Innovations Inc. Southwestern Institute of Physics

Fusion reactions can be achieved by using deuterium from sea water as the *** amount of deuterium in one gallon of sea water contains energy equivalent to three hundred gallons of *** conditions of plasma temperature and density necessary to initiate fusion have been achieved in various research ***,the confinement time is not sufficient for ignition due to plasma *** we show that fatal plasma instabilities could be suppressed by the ingenious arrangement of multi-pinched plasma beams converging symmetrically in space based on the minimization principle of plasma potential *** tests are proposed using tiny wires containing *** successful,the results could lead to a feasible approach to obtaining commercial fusion power from sea water,hence without the need to use expensive and radioactive tritium as the fuel.

关键词： pinch plasma multi-beam convergence spatial symmetry minimum energyprinciple

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spatial symmetry of head-related transfer function

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Chinese Journal of Acoustics 2007年第1期26卷 73-84页

作者： ZHONG Xiaoli XIE Bosun Acoustics Laboratory School of Physics South China University of Technology Guangzhou 510641

Methods for analyzing the spatial symmetry of head-related transfer function （HRTF） are proposed. The influences of anatomical structures on the symmetry of HRTF are investigated using HRTFs measured on KEMAR mannequin and human subjects. Results show that for KEMAR mannequin, pinnae destroy the front-back symmetry of HRTF above 5 to 6 kHz, while for human subjects the frequency reduces to 2.5 kHz because of the locations of ears. Furthermore, at low and median frequencies, HRTF is approximately left-right symmetrical. While as frequencies increase, the asymmetry caused by the fine anatomical leftright differences appears. The starting frequency and the extent of the left-right asymmetry in HRTF depend on individuals. The analyses demonstrate the spatial symmetrical characteristics of HRTF and the frequency ranges in which the current binaural models are valid.

关键词： transfer function spatial symmetry frequency ranges

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spatial Characteristics of Thomson Scattering in a Linearly Polarized Laser Field

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Plasma Science and Technology 2007年第2期9卷 143-146页

作者：兰鹏飞陆培祥曹伟 State Key Laboratory of Laser Technology and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

The spatial characteristics of Thomson scattering in a linearly polarized laser field are investigated. The results show that the electron＇s motion and spatial distributions of Thomson scattering depend sensitively on the phase η0 at which the electron is injected to the laser field. When η0 equals to 0 or π, the electron motion is a zigzag motion and the spatial distributions of the emission show fourfold or twofold symmetry. In other cases of phases, there is a steady drift motion of electron in the transverse direction, which results in the absence of the zigzag motion and a breakdown of the symmetry of the spatial distributions as well.

关键词： Thomson scattering spatial distribution of the emission spatial symmetry

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Electronic structure of hexagonal quantum—disc clusters

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Chinese Physics B 2002年第8期11卷 812-816页

作者：王立民罗莹等 DepartmentofPhysicsandInstituteofTheoreticalPhysics BeijingNormalUniversityBeijing100875China

Within the effective-mass approximation, we investigate the electronic structure of hexagonal quantum-disc clustersusing the finite element method. With an increasing amount of quantum dots in the cluster, the electronic energy levelsquickly expand into mini-bands, each consisting of discrete, unevenly distributed energy levels. The correspondingelectronic eigenfunctions are linear combinations of the electron orbits in each quantum dot. The spatial symmetry ofthe combination is the same as the electronic eigenfunction of a single quantum dot.

关键词： energy band linear combination spatial symmetry

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