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Huang, X.

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.  
WEPC023 Ideas for a Future PEP Light Source 2031
 
  • R. O. Hettel, K. L.F. Bane, L. D. Bentson, K. J. Bertsche, S. M. Brennan, Y. Cai, A. Chao, S. DeBarger, V. A. Dolgashev, X. Huang, Z. Huang, D. Kharakh, Y. Nosochkov, T. Rabedeau, J. A. Safranek, J. Seeman, J. Stohr, G. V. Stupakov, S. G. Tantawi, L. Wang, M.-H. Wang, U. Wienands
    SLAC, Menlo Park, California
  • I. Lindau
    Stanford University, Stanford, Califormia
  • C. Pellegrini
    UCLA, Los Angeles, California
 
  With the termination of operation of the PEP-II storage rings for high energy physics at hand, and with the migration of accelerator operation at SLAC in general to photon science applications, a study of the potential conversion of the PEP-II to a future light source has been initiated. With a circumference of 2.2 km and the capability for high current operation, it is clear that operating a converted ring at medium energy (3-6 GeV) could offer very low emittance and an average brightness of order 1022, limited primarily by the power handling capacity of photon beam line optical components. Higher brightness in the soft X-ray regime might be reached with partial lasing in long undulators if the emittance is sufficiently low, and high peak brightness could be reached with seeded FEL emission. Advanced pulsed rf technology might be used to generate short bunches and fast switched polarization in soft X-ray rf undulators. An overview of the preliminary findings of the PEP Light Source study group will be presented, including lattice, X-ray source and beam line options.