期刊
PHYSICAL REVIEW LETTERS
卷 86, 期 1, 页码 79-82出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.86.79
关键词
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We report the first measurements of the electron-beam microbunching z dependence in a self-amplified spontaneous-emission (SASE) free-electron laser (FEL) experiment by the observation of visible wavelength coherent transition radiation (CTR). In this case the fundamental SASE wavelength was at 537 nm, and the CTR exhibited an exponential intensity growth similar to the SASE radiation. In addition, we observed for the first time structure in the CTR angular distribution patterns that may he useful for optimizing SASE FEL performance.
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