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>The VUV and soft x-ray free electron laser FLASH (former VUV-FEL) is a user facility at DESY\ud
(Hamburg). In order to optimize the performance of the facility, an accurate characterization of the\ud
electron beam properties is essential. The transverse projected emittance, one of the important parameters\ud
characterizing the quality of an electron beam, is measured using a four monitor method with optical\ud
transition radiation monitors. A normalized rms emittance below 2 mmmrad for a 1 nC beam has been\ud
measured. In this paper we describe the experimental setup, data analysis methods, and present\ud
experimental results.
【2h】
The VUV and soft x-ray free electron laser FLASH (former VUV-FEL) is a user facility at DESY\ud
(Hamburg). In order to optimize the performance of the facility, an accurate characterization of the\ud
electron beam properties is essential. The transverse projected emittance, one of the important parameters\ud
characterizing the quality of an electron beam, is measured using a four monitor method with optical\ud
transition radiation monitors. A normalized rms emittance below 2 mmmrad for a 1 nC beam has been\ud
measured. In this paper we describe the experimental setup, data analysis methods, and present\ud
experimental results.
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机译：VUV和软X射线自由电子激光器FLASH（以前的VUV-FEL）是DESY \ ud的用户设施
（汉堡）。为了优化设施的性能，\ ud的准确表征
电子束特性至关重要。横向投影发射率，重要参数之一
表征电子束质量的方法是使用具有光学\ ud
过渡辐射监测仪。 1 udC光束的归一化均方根发射率低于2 mmmrad
测量。在本文中，我们描述了实验设置，数据分析方法以及当前\ ud
实验结果。
The VUV and soft x-ray free electron laser FLASH (former VUV-FEL) is a user facility at DESY\ud(Hamburg). In order to optimize the performance of the facility, an accurate characterization of the\udelectron beam properties is essential. The transverse projected emittance, one of the important parameters\udcharacterizing the quality of an electron beam, is measured using a four monitor method with optical\udtransition radiation monitors. A normalized rms emittance below 2 mmmrad for a 1 nC beam has been\udmeasured. In this paper we describe the experimental setup, data analysis methods, and present\udexperimental results.
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