• Title/Summary/Keyword: Physics

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Low beta superconducting cavity system design for HIAF iLinac

  • Mengxin Xu;Yuan He;Shengxue Zhang;Lubei Liu;Tiancai Jiang;Zehua Liang;Tong Liu;Yue Tao;Chunlong Li;Qitong Huang;Fengfeng Wang;Hao Guo;Feng Bai;Xianbo Xu;Shichun Huang;Xiaoli Li;Zhijun Wang;Shenghu Zhang;Jiancheng Yang;Evgeny Zaplatin
    • Nuclear Engineering and Technology
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    • v.55 no.7
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    • pp.2466-2473
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    • 2023

  • A superconducting ion-Linac (iLinac), which is supposed to work as the injector in the High Intensity heavy-ion Accelerator Facility project, is under development at the Institute of Modern Physics (IMP), Chinese Academy of Sciences. The iLinac is a superconducting heavy ion linear accelerator approximately 100 meters long and contains 96 superconducting cavities in two types of 17 cyromodules. Two types of superconducting resonators (quarter-wave resonators with a frequency of 81.25 MHz and an optimal beta β = v/c = 0.07 called QWR007 and half-wave resonators with a frequency of 162.5 MHz and an optimal beta β = 0.15 called HWR015) have been investigated. The cavity design included extensive multi-parameter electromagnetic simulations and mechanical analysis, and its results are described in details. The fundamental power coupler and cavity dynamic tuner designs are also presented in this article. The prototypes are under manufacturing and expected to be ready in 2023.

  • https://doi.org/10.1016/j.net.2023.04.010 인용 PDF

Atomic-scale Controlled Epitaxial Growth and Characterization of Oxide Thin Films

  • Yang, G.Z.;Lu, H.B.;Chen, F.;Zhao, T.;Chen, Z.H.
    • Proceedings of the Optical Society of Korea Conference
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    • 2001.02a
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    • pp.6-11
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    • 2001

  • More than ten kinds of oxide thin films and their heterostructure have been successfully fabricated on SrTiO$_3$(001) substrates by laser molecular beam epitaxy (laser MBE). Measurements of atomic force microscopy (AFM), high-resolution transmission electron microscopy (HRTEM) and X-ray small-angle reflectivity reveal that the surfaces and interfaces are atom-level-smooth. The unit cell layers and the lattice structure are perfect. The electrical and optical properties of BaTiO$_3$-x thin films and BaTiO$_3$/SrTiO$_3$ (BTO/STO) superlattices were examined. The all-perovskite oxide P-N junctions have been successfully fabricated and the better I-V curves were observed.

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