27-10-2012, 12:01 PM
Simulation of Electron Cloud Multipacting in Solenoidal Magnetic Field
ABSTRACT
A simulation algorithm is based on a numerical solution of the Vlasov equation for the distribution function of an electron
cloud density in a cylindrical vacuum chamber with solenoidal magnetic field. The algorithm takes into consideration space
charge effects. This approach improves the simulation of multipacting effects as it is free of statistical fluctuations. Simulation
studies were carried for the SLAC B-factory vacuum chamber for different bunch patterns and solenoidal field strength. Space
charge and the magnetic field limit the maximum density of the electron cloud. Magnetic resonant damping of multipacting
was found in special cases of positron beam parameters and magnetic field amplitude.
ABSTRACT
A simulation algorithm is based on a numerical solution of the Vlasov equation for the distribution function of an electron
cloud density in a cylindrical vacuum chamber with solenoidal magnetic field. The algorithm takes into consideration space
charge effects. This approach improves the simulation of multipacting effects as it is free of statistical fluctuations. Simulation
studies were carried for the SLAC B-factory vacuum chamber for different bunch patterns and solenoidal field strength. Space
charge and the magnetic field limit the maximum density of the electron cloud. Magnetic resonant damping of multipacting
was found in special cases of positron beam parameters and magnetic field amplitude.