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首页> 外文期刊>Physical Review. Accelerators and Beams >Design and application of multimegawatt span class="aps-inline-formula"math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"miX/mi/math/span-band deflectors for femtosecond electron beam diagnostics
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Design and application of multimegawatt span class="aps-inline-formula"math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"miX/mi/math/span-band deflectors for femtosecond electron beam diagnostics

机译：兆瓦级的设计和应用 class =“ aps-inline-formula”> X 带偏转器用于飞秒电子束诊断

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摘要

Performance of the x-ray free electron laser Linac Coherent Light Source (LCLS) and the Facility for Advanced Accelerator Experimental Tests (FACET) is determined by the properties of their extremely short electron bunches. Multi-GeV electron bunches in both LCLS and FACET are less than 100 fs long. Optimization of beam properties and understanding of free-electron laser operation require electron beam diagnostics with time resolution of about 10 fs. We designed, built and commissioned a set of high frequency $X$-band deflectors which can measure the beam longitudinal space charge distribution and slice energy spread to better than 10 fs resolution at full LCLS energy (14 GeV), and with 70 fs resolution at full FACET energy (20 GeV). Use of high frequency and high gradient in these devices allows them to reach unprecedented performance. We report on the physics motivation, design considerations, operational configuration, cold tests, and typical results of the $X$-band deflector systems currently in use at SLAC.
机译：X射线自由电子激光直线加速器相干光源（LCLS）的性能和先进加速器实验测试的设施（FACET）由其极短电子束的特性决定。 LCLS和FACET中的多GeV电子束的长度都小于100 fs。光束特性的优化和对自由电子激光器操作的理解要求电子束诊断的时间分辨率约为10 fs。我们设计，建造和调试了一组高频$ X $波段偏转器，可以在全LCLS能量（14 GeV）下以70 fs的分辨率测量光束的纵向空间电荷分布和切片能量散布，使其分辨率优于10 fs。在全FACET能量下（20 GeV）。在这些设备中使用高频和高梯度可使它们达到前所未有的性能。我们报告了SLAC当前使用的$ X $带偏转器系统的物理动力，设计考虑，操作配置，冷测试以及典型结果。

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