直线加速器中几何因子随电荷束团密度分布的变化  

VARIATION OF GEOMETRY FACTOR WITH THE DENSITY DISTRIBUTION OF BUNCHED BEAM IN LINAC

作　　者：陈银宝[1] 黄志斌[1] 

机构地区：[1]中国原子能科学研究院

出　　处：《核科学与工程》1999年第1期76-79,共4页Nuclear Science and Engineering

基　　金：国家自然科学基金;核工业基金

摘　　要：直线加速器中的几何因子ｇ是电荷束团的尺寸和管道半径的函数。并依赖于电荷束团的电荷密度分布。采用有限圆柱空间电荷模型，针对ＫａｐｃｈｉｎｓｋｉｊＶｌａｄｉｍｉｒｓｋｉｊ（Ｋ－Ｖ）分布、水袋（ＷＢ）、抛物线（ＰＡ）分布和高斯（ＧＡ）分布，分别求得其表达式；通过数值计算。The geometry factor, g,plays an important role in the beam dynamics. It is, in general, a function of the size of the bunched beam and of the tube radius. The geometry factor also depends on the charge density distribution of the bunched beam in linac. Using the model of the cylindrical space charge in linac, we derived the formulae of the geometry factor for different density distributions, such as Kapchinskij Vladimirskij(K V) distribution, waterbag(WB) distribution, parabolic(PA) distribution and Gaussian(GA) distribution. Finally, the variation of the geometry factor with the density distributions of the bunched beam in linac are also shown by means of the numerical studies.

关 键 词：几何因子 电荷束团 密度分布 直线加速器 

分 类 号：TL530.15[核科学技术—核技术及应用]