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欧洲X射线自由电子激光装置上通过汉伯里·布朗和特威斯干涉测量法揭示的高空间相干性和短脉冲持续时间。

High spatial coherence and short pulse duration revealed by the Hanbury Brown and Twiss interferometry at the European XFEL.

作者信息

Khubbutdinov Ruslan, Gerasimova Natalia, Mercurio Giuseppe, Assalauova Dameli, Carnis Jerome, Gelisio Luca, Le Guyader Loïc, Ignatenko Alexandr, Kim Young Yong, Van Kuiken Benjamin E, Kurta Ruslan P, Lapkin Dmitry, Teichmann Martin, Yaroslavtsev Alexander, Gorobtsov Oleg, Menushenkov Alexey P, Scholz Matthias, Scherz Andreas, Vartanyants Ivan A

机构信息

European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany.

Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany.

出版信息

Struct Dyn. 2021 Aug 23;8(4):044305. doi: 10.1063/4.0000127. eCollection 2021 Jul.

DOI:10.1063/4.0000127
PMID:34476285
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8384452/
Abstract

Second-order intensity interferometry was employed to study the spatial and temporal properties of the European X-ray Free-Electron Laser (EuXFEL). Measurements were performed at the soft x-ray Self-Amplified Spontaneous Emission (SASE3) undulator beamline at a photon energy of 1.2 keV in the Self-Amplified Spontaneous Emission (SASE) mode. Two high-power regimes of the SASE3 undulator settings, i.e., linear and quadratic undulator tapering at saturation, were studied in detail and compared with the linear gain regime. The statistical analysis showed an exceptionally high degree of spatial coherence up to 90% for the linear undulator tapering. Analysis of the measured data in spectral and spatial domains provided an average pulse duration of about 10 fs in our measurements. The obtained results will be valuable for the experiments requiring and exploiting short pulse duration and utilizing high coherence properties of the EuXFEL.

摘要

采用二阶强度干涉测量法研究了欧洲X射线自由电子激光（EuXFEL）的空间和时间特性。测量是在软X射线自放大自发辐射（SASE3）波荡器光束线上进行的，光子能量为1.2 keV，处于自放大自发辐射（SASE）模式。详细研究了SASE3波荡器设置的两种高功率状态，即饱和时的线性和二次波荡器渐变，并与线性增益状态进行了比较。统计分析表明，线性波荡器渐变的空间相干度异常高，高达90%。对光谱和空间域测量数据的分析表明，我们的测量中平均脉冲持续时间约为10 fs。所获得的结果对于需要并利用短脉冲持续时间以及EuXFEL高相干特性的实验将具有重要价值。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d788/8384452/ea74a5dfc938/SDTYAE-000008-044305_1-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d788/8384452/b14d74be3dc7/SDTYAE-000008-044305_1-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d788/8384452/de4a3e2bcb08/SDTYAE-000008-044305_1-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d788/8384452/d4de31213f6b/SDTYAE-000008-044305_1-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d788/8384452/ea74a5dfc938/SDTYAE-000008-044305_1-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d788/8384452/b14d74be3dc7/SDTYAE-000008-044305_1-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d788/8384452/de4a3e2bcb08/SDTYAE-000008-044305_1-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d788/8384452/d4de31213f6b/SDTYAE-000008-044305_1-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d788/8384452/ea74a5dfc938/SDTYAE-000008-044305_1-g004.jpg

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本文引用的文献

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