Effective Lower Hybrid Current Driving (LHCD) and improved confinement experiments in higher plasma parameters (Ip> 200 kA, ne > 2 ×1013 cm-3, Te≥1keV) have been curried out in optimized LH wave spectrum a...Effective Lower Hybrid Current Driving (LHCD) and improved confinement experiments in higher plasma parameters (Ip> 200 kA, ne > 2 ×1013 cm-3, Te≥1keV) have been curried out in optimized LH wave spectrum and plasma parameters in HT - 7 superconducting tokamak. The dependence of current driving efficiency on LH power spectrum, plasma density ne and toroidal magnetic field BT has been obtained under optimal conditions. A good CD efficiency was obtained at higher plasma current and higher electron density. The improvement of the energy confinement time is accompanied with the increase in line averaged electron density, and in ion and electron temperatures. The highest current driving efficiency reached CD = IpneR/PRF ~ 1.05 × 1019 Am-2/W. Wave-plasma coupling was sustained in a good state and the reflective coefficient was less than 5%. The experiments have also demonstrated the ability of LH wave in the start-up and ramp-up of the plasma current. The measurement of the temporal distribution of plasma parameter shows that lower hybrid leads to a broader profile in plasma parameter. The LH power deposition profile and the plasma current density profile were modeled with a 2D Fokker-Planck code corresponding to the evolution process of the hard x-ray detector array.展开更多
以下6个步骤可以让你将公司的外部趋势转化为你公司的内部战略.
提起英国石油公司（BP）首席执行官约翰，布朗爵士（Lord John Browne）．可能最为著名的要数他和他的公司在1997年的那次冒险。在那时，Lord Browne在外部环境的指引下...以下6个步骤可以让你将公司的外部趋势转化为你公司的内部战略.
提起英国石油公司（BP）首席执行官约翰，布朗爵士（Lord John Browne）．可能最为著名的要数他和他的公司在1997年的那次冒险。在那时，Lord Browne在外部环境的指引下开始重新配置公司的资源，同时他是首次提出二氧化碳排放与全球变暖有关的大石油公司的首席执行官，发起绿色能源的口号，尽管一度BP的石油价格下滑，但该公司最终是否经受住了严峻的考验呢？展开更多
基金The project supported by National Nature Science Foundation of China (No. 19985005)
文摘Effective Lower Hybrid Current Driving (LHCD) and improved confinement experiments in higher plasma parameters (Ip> 200 kA, ne > 2 ×1013 cm-3, Te≥1keV) have been curried out in optimized LH wave spectrum and plasma parameters in HT - 7 superconducting tokamak. The dependence of current driving efficiency on LH power spectrum, plasma density ne and toroidal magnetic field BT has been obtained under optimal conditions. A good CD efficiency was obtained at higher plasma current and higher electron density. The improvement of the energy confinement time is accompanied with the increase in line averaged electron density, and in ion and electron temperatures. The highest current driving efficiency reached CD = IpneR/PRF ~ 1.05 × 1019 Am-2/W. Wave-plasma coupling was sustained in a good state and the reflective coefficient was less than 5%. The experiments have also demonstrated the ability of LH wave in the start-up and ramp-up of the plasma current. The measurement of the temporal distribution of plasma parameter shows that lower hybrid leads to a broader profile in plasma parameter. The LH power deposition profile and the plasma current density profile were modeled with a 2D Fokker-Planck code corresponding to the evolution process of the hard x-ray detector array.
文摘以下6个步骤可以让你将公司的外部趋势转化为你公司的内部战略.
提起英国石油公司（BP）首席执行官约翰，布朗爵士（Lord John Browne）．可能最为著名的要数他和他的公司在1997年的那次冒险。在那时，Lord Browne在外部环境的指引下开始重新配置公司的资源，同时他是首次提出二氧化碳排放与全球变暖有关的大石油公司的首席执行官，发起绿色能源的口号，尽管一度BP的石油价格下滑，但该公司最终是否经受住了严峻的考验呢？
