Calculation of the Beam Field in the LCLS Bunch Length Monitor | Zendy

Gennady Stupakov | Zendy; Yuantao Ding | Zendy; Zhirong Huang | Zendy

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Calculation of the Beam Field in the LCLS Bunch Length Monitor

Author(s) -

Gennady Stupakov,

Yuantao Ding,

Zhirong Huang

Publication year - 2006

Language(s) - English

Resource type - Reports

DOI - 10.2172/883262

Subject(s) - physics , synchrotron radiation , gas compressor , optics , linear particle accelerator , diffraction , beam (structure) , radiation , length measurement , electron , field (mathematics) , computational physics , nuclear physics , mathematics , pure mathematics , thermodynamics

Maintaining a stable bunch length and peak current is a critical step for the reliable operation of a SASE based x-ray source. In the LCLS, relative bunch length monitors (BLM) right after both bunch compressors are proposed based on the coherent radiation generated by the short electron bunch. Due to its diagnostic setup, the standard far field synchrotron radiation formula and well-developed numerical codes do not apply for the analysis of the BLM performance. In this paper, we develop a calculation procedure to take into account the near field effect, the effect of a short bending magnet, and the diffraction effect of the radiation transport optics. We find the frequency response of the BLM after the first LCLS bunch compressor and discuss its expected performance

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