Feasibility study of online tuning of the luminosity in a circularcollider with the robust conjugate direction search method

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JI Hong-Fei, JIAO Yi, WANG Sheng, JI Da-Heng, YU Cheng-Hui, ZHANG Yuan and HUANG Xiao-Biao. Feasibility study of online tuning of the luminosity in a circularcollider with the robust conjugate direction search method[J]. Chinese Physics C, 2015, 39(12): 127006. doi: 10.1088/1674-1137/39/12/127006
JI Hong-Fei, JIAO Yi, WANG Sheng, JI Da-Heng, YU Cheng-Hui, ZHANG Yuan and HUANG Xiao-Biao. Feasibility study of online tuning of the luminosity in a circularcollider with the robust conjugate direction search method[J]. Chinese Physics C, 2015, 39(12): 127006.  doi: 10.1088/1674-1137/39/12/127006 shu
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Received: 2015-03-31
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    Supported by National Natural Science Foundation of China (11475202, 11405187) and Youth Innovation Promotion Association of Chinese Academy of Sciences (2015009)

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Feasibility study of online tuning of the luminosity in a circularcollider with the robust conjugate direction search method

    Corresponding author: JIAO Yi,
Fund Project:  Supported by National Natural Science Foundation of China (11475202, 11405187) and Youth Innovation Promotion Association of Chinese Academy of Sciences (2015009)

Abstract: The robust conjugate direction search (RCDS) method has high tolerance to noise in beam experiments. It has been demonstrated that this method can be used to optimize the machine performance of a light source online. In our study, taking BEPCII as an example, the feasibility of online tuning of the luminosity in a circular collider is explored, through numerical simulation and preliminary online experiments. It is shown that the luminosity that is artificially decreased by a deviation of beam orbital offset from optimal trajectory can be recovered with this method.

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