理论分析了负氢离子源中中性粒子传输特性及引出电极表面产生负氢离子(H^-)的物理过程,研究了引出孔传输率对氢原子传输的影响,深入剖析了氢原子与不同属性导体壁碰撞以及碰撞后反射的物理情景.基于CHIPIC软件平台,成功研制了全三维Part...理论分析了负氢离子源中中性粒子传输特性及引出电极表面产生负氢离子(H^-)的物理过程,研究了引出孔传输率对氢原子传输的影响,深入剖析了氢原子与不同属性导体壁碰撞以及碰撞后反射的物理情景.基于CHIPIC软件平台,成功研制了全三维Particle-in-cell with Monte Carlo collision氢原子传输及负氢离子产生物理过程的模拟算法,并采用JAEA 10A负氢离子源进行模拟验证.模拟达到稳态后,氢原子平均能量约为0.57 eV,且H原子呈现+Y漂移,当非均匀氢原子束轰击引出壁时,导致产生的负氢离子空间分布不均匀.这些模拟结果都与文献符合,验证了算法的可靠性.展开更多
Three-dimensionally ordered macroporous polystyrene(3DOM PS) with pore size of 350 nm was fabricated using Cp2Co/Ethyl 2-bromoisobutyrate(EBiB) catalytic system by ATRP.The resulting polymers were detected by FT-IR,1H...Three-dimensionally ordered macroporous polystyrene(3DOM PS) with pore size of 350 nm was fabricated using Cp2Co/Ethyl 2-bromoisobutyrate(EBiB) catalytic system by ATRP.The resulting polymers were detected by FT-IR,1H-NMR,SEM,and GPC.The microstructure of 3DOM PS was confirmed by FT-IR and 1H-NMR.SEM micrographs show that both silica spheres within the templates and pores in the 3DOM polystyrene are arranged in highly ordered fashion,and the shrinkage of the pores in the 3DOM PS is 24%.GPC curves show that the 3DOM PS possesses slightly lower Mn and narrow MWD compared with bulk one.This result indicats that living polymerization is different from non-living polymerizationin in the confined space.展开更多
文摘理论分析了负氢离子源中中性粒子传输特性及引出电极表面产生负氢离子(H^-)的物理过程,研究了引出孔传输率对氢原子传输的影响,深入剖析了氢原子与不同属性导体壁碰撞以及碰撞后反射的物理情景.基于CHIPIC软件平台,成功研制了全三维Particle-in-cell with Monte Carlo collision氢原子传输及负氢离子产生物理过程的模拟算法,并采用JAEA 10A负氢离子源进行模拟验证.模拟达到稳态后,氢原子平均能量约为0.57 eV,且H原子呈现+Y漂移,当非均匀氢原子束轰击引出壁时,导致产生的负氢离子空间分布不均匀.这些模拟结果都与文献符合,验证了算法的可靠性.
基金Supported by National Natural Science Foundation of China (Grant No. 50273009)Natural Science Foundation of Hebei Province (Grant No. E2007000052)+1 种基金Science Research Plan of Department of Education,Hebei Province (Grant No. 2007307)Doctor Open Foundation of Key Laboratory of Functional Polymer Material of Ministry of Education,Nankai University) (Grant No. 2006-007)
文摘Three-dimensionally ordered macroporous polystyrene(3DOM PS) with pore size of 350 nm was fabricated using Cp2Co/Ethyl 2-bromoisobutyrate(EBiB) catalytic system by ATRP.The resulting polymers were detected by FT-IR,1H-NMR,SEM,and GPC.The microstructure of 3DOM PS was confirmed by FT-IR and 1H-NMR.SEM micrographs show that both silica spheres within the templates and pores in the 3DOM polystyrene are arranged in highly ordered fashion,and the shrinkage of the pores in the 3DOM PS is 24%.GPC curves show that the 3DOM PS possesses slightly lower Mn and narrow MWD compared with bulk one.This result indicats that living polymerization is different from non-living polymerizationin in the confined space.
