A Nonlinear Lens System to Smooth the Intensity Distribution of a Gaussian Beam
A Nonlinear Lens System to Smooth the Intensity Distribution of a Gaussian Beam
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平滑高斯光束强度分布的非线性透镜系统
DOI：
10.1109/tns.1983.4332972
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发表时间：
1983
影响因子：
1.8
通讯作者：
P. Meads
中科院分区：
文献类型：
--
作者：
P. Meads
典型离子束的强度分布是非常不均匀的，具有明亮的中心和弥散的边缘；在很多情况下，实际分布可以用高斯分布进行充分近似。然而，这种离子束的许多应用要求从靶的中心到边缘都有均匀的照射。在此表明，由一对八极磁铁产生的可控三阶像差系统能够通过使离子束的中心展开并使边缘折叠，从而大幅平滑强度分布，使得在整个靶上强度几乎均匀。
The intensity distribution of a typical ion beam is quite nonuniform with a bright center and a diffuse edge; in many cases, the actual distribution is adequately approximated by a Gaussian distribution. However, many uses for such beams require uniform illumination from the center of the target to its edges. It is shown here that a system of controlled third-order aberrations produced by a pair of octupole magnets is able to sustantially smooth the intensity distribution by spreading the center and folding in the edges of the beam such that the intensity is nearly uniform over the entire target.