The preliminary experimental results of ac plasma discharges in the CT-6B tokamak have been achieved by an active plasma current feedback system and the keys to a smooth transition through current zero and some phenom...The preliminary experimental results of ac plasma discharges in the CT-6B tokamak have been achieved by an active plasma current feedback system and the keys to a smooth transition through current zero and some phenomena related to the current reversal phase are also presented.展开更多
A brief gas puffing method has been used to determine the amount of adsorbed gas on the surface of a vacuum system when the pressure in the system is changed.The adsorbed gas is found to correspond to one monomolecula...A brief gas puffing method has been used to determine the amount of adsorbed gas on the surface of a vacuum system when the pressure in the system is changed.The adsorbed gas is found to correspond to one monomolecular layer in this experiment.展开更多
There is a large amount of micro debris ranging between millimeters and micrometers in space, which has significant influence on the reliability and life of spacecrafts through long-duration integrated impacts and has...There is a large amount of micro debris ranging between millimeters and micrometers in space, which has significant influence on the reliability and life of spacecrafts through long-duration integrated impacts and has to be considered in designing a vehicle's suitability to the space environment. In order to simulate the micro-impacts on exposed materials, a plasma-driven micro-particle accelerator was developed. The major processes, including the acceleration, compression and ejection of plasmas, were modeled. By comparing the theoretical simulations with the experimental results, the acceleration mechanism was clarified. Moreover, through a series of experiments, the optimum operation range was investigated, and the acceleration ability was primarily determined.展开更多
基金Supported by the Chinese National Advanced Technology Foundation.
文摘The preliminary experimental results of ac plasma discharges in the CT-6B tokamak have been achieved by an active plasma current feedback system and the keys to a smooth transition through current zero and some phenomena related to the current reversal phase are also presented.
文摘A brief gas puffing method has been used to determine the amount of adsorbed gas on the surface of a vacuum system when the pressure in the system is changed.The adsorbed gas is found to correspond to one monomolecular layer in this experiment.
基金Supported by the Project of Development and Transformation of Scientific Equipment from Chinese Academy of Sciences (Grant No. Y2003011)
文摘There is a large amount of micro debris ranging between millimeters and micrometers in space, which has significant influence on the reliability and life of spacecrafts through long-duration integrated impacts and has to be considered in designing a vehicle's suitability to the space environment. In order to simulate the micro-impacts on exposed materials, a plasma-driven micro-particle accelerator was developed. The major processes, including the acceleration, compression and ejection of plasmas, were modeled. By comparing the theoretical simulations with the experimental results, the acceleration mechanism was clarified. Moreover, through a series of experiments, the optimum operation range was investigated, and the acceleration ability was primarily determined.
