4. Summary and outlook Electron cloud evolution can be modeled using polynomial maps whose coefficients are functions of beam and chamber parameters, derived from simulations codes like CSEC or ECLOUD. This has helped to optimize the RHIC bunch

1
Maps for electron clouds U. Iriso and S.
Peggs C-A D, Brookhaven National Laboratory
N2x1010 ppb
4. Summary and outlook Electron cloud evolution
can be modeled using polynomial maps whose
coefficients are functions of beam and chamber
parameters, derived from simulations codes like
CSEC or ECLOUD. This has helped to optimize the
RHIC bunch pattern, and enables investigation of
the phase transition from off??on. For R0?1
the map coefficients at low bunch intensities
appear to show long term memory, suggesting the
presence of hysteresis.