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Corbett, W. J.

Paper Title Page
TUPP028 Bunch Length and Impedance Measurements at SPEAR3 1595
 
  • W. J. Corbett, W. X. Cheng, A. S. Fisher, X. Huang
    SLAC, Menlo Park, California
 
  A series of bunch length measurements have been made for different lattice configurations in SPEAR3 as a function of single-bunch current. The lattices include achromatic optics, low-emittance optics and short-bunch, low-momentum compaction optics (low-alpha). The streak-camera data clearly demonstrates effects of both resistive and reactive chamber impedance and shows levels of microwave instability threshold. In the low-alpha mode, signs of bunch length ‘bursting’ were observed. Fitted bunch-profile data, impedance calculations and bursting data are presented.