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国家自然科学基金(10775010)

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发文基金:国家自然科学基金国家重点基础研究发展计划更多>>
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Design of a capacitive main power coupler for RF superconducting accelerators
2008年
An updated main coupler has been designed for the superconducting accelerator of Free Electron Laser (FEL) project under construction in Peking University. A capacitive structure is chosen for the main coupler. Numerical investigation using CST Microwave Studio demonstrates the cold window part. The other nonstandard structures such as holding rods and antenna are also optimized. The coupler uses a 95% purity Al2O3 ceramic cold window. The VSWR (Vottage Standing Wave Ratio) is 1.02 at 1.3 GHz and the frequency bandwidth is 45 MHz with VSWR〈I.1. The electric field intensity is 8.5× 10-2 kV/mm around the window with 20 kW Continuous Wave (CW) transmitted power. The Qext is designed variable from 5× 10^8 to 1×10^7.
贺斐思郝建奎张保澄赵夔
关键词:COUPLER
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