A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z  

Cheng, W.X.

Paper Title Page
TUPEC039 Injected Beam Dynamics in SPEAR3 1811
 
  • W.J. Corbett, A.S. Fisher, X. Huang, J.A. Safranek, S. Westerman
    SLAC, Menlo Park, California
  • W.X. Cheng
    BNL, Upton, Long Island, New York
  • W.Y. Mok
    Life Imaging Technology, Palo Alto, California
 
 

As SPEAR3 moves closer to trickle-charge topup injection, the complex phase-space dynamics of the injected beam becomes increasingly important for capture efficiency and machine protection. In the horizontal plane the beam executes ~12mm betatron oscillations and begins to filament within 10's of turns. In the vertical plane the beam is more stable but a premium is placed on flat-orbit injection through the Lambertson septum and the correct optical match. Longitudinally, energy spread in the booster is converted to arrival-time dispersion by the strong R56 component in the transfer line. In this paper, we report on turn-by-turn imaging of the injected beam in both the transverse plane and in the longitudinal direction using a fast-gated ccd and streak camera, respectively.

 
TUPD084 High Current Limitations for the NSLS-II Booster 2108
 
  • A. Blednykh, W.X. Cheng, R.P. Fliller, Y. Kawashima, J. Rose, T.V. Shaftan, L.-H. Yu
    BNL, Upton, Long Island, New York
 
 

In this paper, we present an overview of the impact of collective effects upon the performance of the NSLS-II booster.