LONGITUDINAL PHASE SPACE STUDIES AT PITZ

LONGITUDINAL PHASE SPACE STUDIES AT PITZ
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皮茨纵向相空间研究

DOI:
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发表时间:
2005
期刊:
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影响因子:
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通讯作者:
F. Stephan
F. Stephan
中科院分区:
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文献类型:
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作者:
J. Ronsch;J. Rossbach;D. Lipka;K. Abrahamyan;G. Asova;G. Dimitrov;S. Khodyachykh;M. Krasilnikov;S. Liu;V. Miltchev;A. Oppelt;B. Petrosyan;S. Riemann;L. Staykov;F. Stephan

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位于Zeuten(PITZ)的DESY的光注入器测试设施的主要目标是测试和优化自由电子激光(FEL)的光注入器。对这种光注入器的要求是横向发射率小、束流短、束流电荷高。自由电子激光由一个加速器驱动,该加速器由一个射频电子枪、一个加速器和一个磁束压缩机组成。对于有效的束团压缩,必须对纵向相空间进行详细的研究。必须了解粒子在束团中的位置与它们的纵向动量之间的关联,并且必须分析纵向相空间的非线性。研制了一种利用偶极子、切伦科夫辐射器、光传输线和条纹相机进行动量为5 MeV左右的纵向相空间层析成像的专用装置。给出了纵向相空间测量结果,并与模拟结果进行了比较,讨论了空间电荷力的影响。
The main goal of the Photo Injector Test facility at DESY in Zeuthen (PITZ) is to test and to optimize photo injectors for Free-Electron Lasers (FELs). The demands on such a photo injector are small transverse emittances, short bunches and high bunch charge. A FEL is driven by an accelerator which consists of a RF gun followed by an acceleration section and a magnetic bunch compressor. For an effective bunch compression detailed studies of the longitudinal phase space have to be performed. The correlation between the positions of the particles in the bunch and their longitudinal momenta has to be understood and the non-linearities of the longitudinal phase space have to be analysed. A special apparatus for longitudinal phase space tomography at a momentum of around 5 MeV using a dipole, a Cherenkov radiator, an optical transmission line and a streak camera was developed. Results of longitudinal phase space measurements are presented and compared with simulations and the influence of the space charge force is discussed.