Design and high order optimization of the Accelerator Test Facility lattices
Design and high order optimization of the Accelerator Test Facility lattices
复制标题
加速器测试设施晶格的设计和高阶优化
DOI：
10.1103/physrevstab.17.021002
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
and M. Woodley
中科院分区：
文献类型：
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作者：
E. Marin;R. Tomás;P. Bambade;K. Kubo;T. Okugi;T. Tauchi;N. Terunuma;J. Urakawa;A. Seryi;G. R. White;and M. Woodley
加速器测试设施2（ATF 2）旨在测试新的色度校正方案，该方案将在未来的直线对撞机（如国际直线对撞机（ILC）和紧凑型直线对撞机（CLIC））的最终聚焦系统中实施。ATF2标称和超低晶格设计用于将光束垂直聚焦在焦点处，或通常称为相互作用点（IP），分别低至37和23 nm。标称和超低晶格的垂直色度分别与ILC和CLIC的垂直色度相当。当在模拟中考虑测量的ATF2磁体的多极分量时，IP处的评估光斑尺寸远高于设计值。在本文中，我们描述了高阶像差的分析，可以识别所观察到的光束尺寸增长的来源。为了恢复设计光斑尺寸，考虑了三种解决方案，即最后的双合线替换，八极插入，和光学修改。对于未来的直线对撞机项目，最后一对的聚焦四极磁铁的磁场误差的后果也被解决。
The Accelerator Test Facility 2 (ATF2) aims to test the novel chromaticity correction scheme which is implemented in the final focus systems of future linear colliders such as the International Linear Collider (ILC) and the Compact Linear Collider (CLIC). The ATF2 nominal and ultralowlattices are designed to vertically focus the beam at the focal point, or usually referred to as interaction point (IP), down to 37 and 23 nm, respectively. The vertical chromaticities of the nominal and ultralowlattices are comparable to those of ILC and CLIC, respectively. When the measured multipole components of the ATF2 magnets are considered in the simulations, the evaluated spot sizes at the IP are well above the design values. In this paper we describe the analysis of the high order aberrations that allows identifying the sources of the observed beam size growth. In order to recover the design spot sizes three solutions are considered, namely final doublet replacement, octupole insertion, and optics modification. Concerning the future linear collider projects, the consequences of magnetic field errors of the focusing quadrupole magnet of the final doublet are also addressed.
DOI：
--
发表时间：
2008
期刊：
Bulletin of the American Physical Society
影响因子：
--
作者：
B. Barish
通讯作者：
B. Barish