A Monte Carlo simulation technique has been used to model the electron transport' behavior, especially the electron density and energy distributions under the influence of a mirror magnetic field and a uniform ele...A Monte Carlo simulation technique has been used to model the electron transport' behavior, especially the electron density and energy distributions under the influence of a mirror magnetic field and a uniform electric field in a positive column of helium direct current(DC) gas discharge Graphs showing the electron density and energy distributions, and the percentage of electrons that reach the wall and the end of the positive column are presented. The results indicate that the mirror magnetic field can control the electron transport behavior in the positive column which are in good agreement with experimental results.展开更多
We have inquired into a means to decrease the number of charged particles escaping from a loss cone of a magnetic mirror reactor as many as possible. We previously reported the way of installing a supplemental magneti...We have inquired into a means to decrease the number of charged particles escaping from a loss cone of a magnetic mirror reactor as many as possible. We previously reported the way of installing a supplemental magnetic mirror (which has a cyclotron heating space within) at the exit of a main magnetic bottle. The cyclotron heating space was set to increase a reflection-efficiency of the supplemental mirror. We could not suppress the loss of the escaping deuteron ions sufficiently even with a very long mirror and a very powerful electric field. Then, in this work we propose a new plan of installing another supplemental mirror besides the previous supplemental mirror. A new mirror is set perpendicularly to the center axis of the main bottle. By the addition of the perpendicular mirror, an efficiency of sending back of escaping deuteron ions is considerably theoretically improved. Also in the previous work, since we did not touch how to supply a high-frequency electric field to the cyclotron heating space, here we consider supplying it by an extraordinary-wave with a cyclotron frequency. It is mentioned that propagation of an extraordinary-wave with an electron cyclotron frequency depends on a magnetic field strength and density of escaping electrons.展开更多
With the aim of producing all-solid-state electrochromic mirrors, La<sub>0.67–x</sub>Li<sub>3x</sub>TiO<sub>3 </sub>(LLTO) and the WO<sub>3</sub> were prepared by elect...With the aim of producing all-solid-state electrochromic mirrors, La<sub>0.67–x</sub>Li<sub>3x</sub>TiO<sub>3 </sub>(LLTO) and the WO<sub>3</sub> were prepared by electron beam deposition. The LLTO (with x = 0.11) powder was synthesized by thermally ball-grinding method and the Li<sup>+</sup> ionic conductivity of the LLTO ceramic targets was found to be of ca. 3.25 × 10<sup>–3</sup> S/cm. Using LLTO targets for e-beam evaporation, 300 nm-thick films with the Li<sup>+</sup> ionic conductivity of 5.50 × 10<sup>–5</sup> S/cm were deposited. Combining LLTO films with WO<sub>3</sub>/ITO and LiMn<sub>2</sub>O<sub>4</sub> layers, all-solid-state electrochromic mirrors with a laminar structure of Al/LiMn<sub>2</sub>O<sub>4</sub>/LLTO/WO<sub>3</sub>/ITO were prepared. The reversible reflectance of the mirrors was well controlled by applying polarized potentials onto the ITO electrode. The obtained results suggest useful applications for electrochromic windows working as a smart reflectance mirror that can be used for auto rear-view mirrors.展开更多
An Electron Cyclotron Resonance(ECR)ion source is a magnetically confined plasma device,whose confinement magnetic field is usually achieved by the superposition of an axial mirror magnetic field and a radial sextuple...An Electron Cyclotron Resonance(ECR)ion source is a magnetically confined plasma device,whose confinement magnetic field is usually achieved by the superposition of an axial mirror magnetic field and a radial sextuple field,configurating the so-called Minimum-B(Min-B)field[1].展开更多
针对连续波线性调频(Linear frequency modulation continuous wave,LFMCW)引信信号特征参数的提取,提出了基于树形正交镜像滤波器组(Quadrature mirror filter bank tree,QMFBT)线性分解技术提取信号特征参数的方法。该方法将截获的LF...针对连续波线性调频(Linear frequency modulation continuous wave,LFMCW)引信信号特征参数的提取,提出了基于树形正交镜像滤波器组(Quadrature mirror filter bank tree,QMFBT)线性分解技术提取信号特征参数的方法。该方法将截获的LFMCW引信信号进行下变频,经离散化和归一化后输入到QMFBT中进行线性分解,分析不同时频分析层面所包含的信号信息,结合引信实时性要求和信号本身特征,在合适的时频分析层面提取LFMCW引信信号的特征参数。仿真分析表明,该方法不需要任何先验信息即能有效地提取LFMCW引信信号的调制信息和特征参数,具有较强的抗噪声能力,而且不存在双线性变换中的交叉项问题,满足引信信号识别实时性的要求。展开更多
文摘A Monte Carlo simulation technique has been used to model the electron transport' behavior, especially the electron density and energy distributions under the influence of a mirror magnetic field and a uniform electric field in a positive column of helium direct current(DC) gas discharge Graphs showing the electron density and energy distributions, and the percentage of electrons that reach the wall and the end of the positive column are presented. The results indicate that the mirror magnetic field can control the electron transport behavior in the positive column which are in good agreement with experimental results.
文摘We have inquired into a means to decrease the number of charged particles escaping from a loss cone of a magnetic mirror reactor as many as possible. We previously reported the way of installing a supplemental magnetic mirror (which has a cyclotron heating space within) at the exit of a main magnetic bottle. The cyclotron heating space was set to increase a reflection-efficiency of the supplemental mirror. We could not suppress the loss of the escaping deuteron ions sufficiently even with a very long mirror and a very powerful electric field. Then, in this work we propose a new plan of installing another supplemental mirror besides the previous supplemental mirror. A new mirror is set perpendicularly to the center axis of the main bottle. By the addition of the perpendicular mirror, an efficiency of sending back of escaping deuteron ions is considerably theoretically improved. Also in the previous work, since we did not touch how to supply a high-frequency electric field to the cyclotron heating space, here we consider supplying it by an extraordinary-wave with a cyclotron frequency. It is mentioned that propagation of an extraordinary-wave with an electron cyclotron frequency depends on a magnetic field strength and density of escaping electrons.
文摘With the aim of producing all-solid-state electrochromic mirrors, La<sub>0.67–x</sub>Li<sub>3x</sub>TiO<sub>3 </sub>(LLTO) and the WO<sub>3</sub> were prepared by electron beam deposition. The LLTO (with x = 0.11) powder was synthesized by thermally ball-grinding method and the Li<sup>+</sup> ionic conductivity of the LLTO ceramic targets was found to be of ca. 3.25 × 10<sup>–3</sup> S/cm. Using LLTO targets for e-beam evaporation, 300 nm-thick films with the Li<sup>+</sup> ionic conductivity of 5.50 × 10<sup>–5</sup> S/cm were deposited. Combining LLTO films with WO<sub>3</sub>/ITO and LiMn<sub>2</sub>O<sub>4</sub> layers, all-solid-state electrochromic mirrors with a laminar structure of Al/LiMn<sub>2</sub>O<sub>4</sub>/LLTO/WO<sub>3</sub>/ITO were prepared. The reversible reflectance of the mirrors was well controlled by applying polarized potentials onto the ITO electrode. The obtained results suggest useful applications for electrochromic windows working as a smart reflectance mirror that can be used for auto rear-view mirrors.
文摘An Electron Cyclotron Resonance(ECR)ion source is a magnetically confined plasma device,whose confinement magnetic field is usually achieved by the superposition of an axial mirror magnetic field and a radial sextuple field,configurating the so-called Minimum-B(Min-B)field[1].
文摘针对连续波线性调频(Linear frequency modulation continuous wave,LFMCW)引信信号特征参数的提取,提出了基于树形正交镜像滤波器组(Quadrature mirror filter bank tree,QMFBT)线性分解技术提取信号特征参数的方法。该方法将截获的LFMCW引信信号进行下变频,经离散化和归一化后输入到QMFBT中进行线性分解,分析不同时频分析层面所包含的信号信息,结合引信实时性要求和信号本身特征,在合适的时频分析层面提取LFMCW引信信号的特征参数。仿真分析表明,该方法不需要任何先验信息即能有效地提取LFMCW引信信号的调制信息和特征参数,具有较强的抗噪声能力,而且不存在双线性变换中的交叉项问题,满足引信信号识别实时性的要求。
