| 轴对称磁场的束流光学及其在ECR离子源中的应用 |
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| 引用本文： | 盛丽娜, 宋明涛. 轴对称磁场的束流光学及其在ECR离子源中的应用[J]. 强激光与粒子束, 2007, 19(07). |
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| 作者姓名： | 盛丽娜 宋明涛 |
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| 作者单位： | 1.中国科学院 近代物理研究所, 兰州 730000 |
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| 摘 要： | 带电粒子在轴对称磁场中一边沿着对称轴向前运动，一边绕对称轴旋转。所以横向运动可以分解为两部分：聚焦运动和子午面的旋转。因此，4维横向传输矩阵可以表示为聚焦矩阵和旋转矩阵的乘积。用旋转矩阵和聚焦矩阵重新推导了总的传输矩阵。然后给出了相应的相椭圆系数矩阵来进一步估算从ECR离子源引出束流的发射度.详细地讨论了束流分布函数的二次矩。
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| 关 键 词： | 轴对称磁场 旋转子午面 传输矩阵 相椭圆系数矩阵 束发射度 ECR离子源 |
Beam optics of axially symmetric magnetic lens and its applications in ECR ion source |
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| sheng li-na, song ming-tao. Beam optics of axially symmetric magnetic lens and its applications in ECR ion source[J]. High Power Laser and Particle Beams, 2007, 19. |
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| Authors: | sheng li-na song ming-tao |
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| Affiliation: | 1. Institute of Modern Physics,Chinese Academy of Sciences,P.O.Box 31,Lanzhou 730000,China |
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| Abstract: | In an axially symmetric magnetic field, charged particles move along the axis and rotate around the axis at the same time. Accordingly, the transverse motion can be decomposed into two parts, the focusing movement and the rotation of the meridian plane, and the 4-dimensional transfer matrix can be expressed as the product of a focusing matrix and two rotation matrices. The overall transfer matrix is re-derived in this article with the rotation matrices and the focusing matrix. Then the corresponding sigma matrix is given to further estimate the beam emittance extracted from electron cyclotron resonance ion source. The second moment of the beam distribution function is discussed in detail. |
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| Keywords: | axially symmetric magnetic field rotating meridian plane transfer matrix sigma matrix beam emittance ecr ion source |
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