Author: Gao, B.
Paper Title Page
TUA1WB03
 Injection Transient Observation via Bunch-by-bunch Beam Size Measurement System  
 
  • H.J. Chen, J. Chen, B. Gao, Y.B. Leng
    SINAP, Shanghai, People's Republic of China
  
  A bunch-by-bunch beam size mea­sure­ment sys­tem has been de­vel­oped at SSRF as a sub-sys­tem of 6-di­men­sion bunch-by-bunch di­ag­nos­tic sys­tem, which is an at­tempt for global bunch in­for­ma­tion cap­tur­ing dur­ing in­sta­bil­i­ties by SSRF BI group. The sys­tem is com­posed of di­rect-imag­ing op­ti­cal front-end, high-speed pho­to­mul­ti­plier array de­tec­tor, sig­nal am­pli­fiers and high sam­pling rate os­cil­lo­scope as sig­nal ac­qui­si­tion method. An in­jec­tion tran­sient process has been suc­cess­fully cap­tured based on 4-chan­nels sig­nal with strongly bunch po­si­tion and hor­i­zon­tal beam size os­cil­la­tion after in­jec­tion point as be­ta­tron os­cil­la­tion of SSRF stor­age ring. It demon­strates the bunch-by-bunch mea­sure­ment ca­pa­bil­ity of the sys­tem, which will be used for other fast in­sta­bil­i­ties mon­i­tor­ing and analy­sis. Fur­ther 16 chan­nels de­tec­tion using syn­chro­nized dig­i­tiz­ers and other op­ti­miza­tions is also under de­vel­op­ing for high size res­o­lu­tion.  
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