提高光通量的软X射线非周期多层膜的数值模拟
NUMERICAL SIMULATION OF DISORDER SOFT XRAY MULTILAYER FOR A MAXIMUM INTEGRATED REFLECTIVITY
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摘要: 在周期多层膜基础上,采用随机数方法找到适当的非周期膜系, 极大地提高了反射光通量,并给出了整体设计步骤。模拟计算结果表明非周期多层膜能扩展带宽和提高反射率积分值。在12.4~20.1nm波段内,最佳非周期多层膜与峰值在中心波长λ=16.25nm处 的周期多层膜相比,理论积分反射率提高了75%。多个多层膜组成系统的积分强度无明显改善。Abstract: A random method used for improving light throughput of a soft Xray multilayer mirror has been developed. It is demon strated that layer thickness disorder yields band broadening and increased integrated reflectivity,and achieved 75% increase in integrated reflctivity in the 12.4~20.1nm spectral range with respect to periodic multilayer with its first Bragg peak in the center of that range.
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Key words:
- disordered multilayer /
- soft x ray /
- random number /
- integratedreflectivity
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