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MOPAB082 | Design and Simulation of High Order Mode Cavity Bunch Length Monitor for Infrared Free Electron Laser | 309 |
SUSPSIK076 | use link to see paper's listing under its alternate paper code | |
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Funding: Supported by The National Key Research and Development Program of China (2016YFA0401900, 2016YFA0401903); NSFC (11375178, 11575181); the Fundamental Research Funds for the Central Universities (WK2310000046) A bunch length monitor using resonant cavity has been designed for the NSRL Infrared Free Electron Laser (IR-FEL) facility. To avoid the restriction of working fre-quency caused by the beam pipe radius, the high order modes of the harmonic cavities are utilized. The position and orientation of coaxial probes are optimized to avoid interference modes which come from the cavity and beam tube according to the analysis formula of electro-magnetic field distribution. Based on the parameters of IR-FEL, a simulation is performed to verify the feasibility of the bunch length monitor. The simulation result shows that the design meets the requirements of IR-FEL, and the resolution can be better than 50 fs. |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB082 | |
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MOPAB083 | The New Beam Current Transformer for IR-FEL Facility at NSRL * | 312 |
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Funding: Supported by The National Science Foundation of China (Grant No. 11575181) The beam current transformer (CT) is an important part of the beam diagnostics system as a kind of non-destructive intensity measurement. The beam CT has the strong dependence of the sensitivity and time constant on the time structure of the beam. To measure the macro-pulse beam intensity with 5-10 's length and 238 MHzμpulse repetition rate in the IR-FEL, it is necessary to find a suitable material as the CT core which can meet the measure requirement of the beam current. In this paper, three different magnetic materials were tested to find out that the laminated amorphous core owned the best performance, meanwhile, the mechanical structure was designed. The finished product passed the acceptance test. |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB083 | |
Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |