  The Rapid Cycling Synchrotron (RCS) is a key component of the China
Spallation Neutron Source (CSNS). For this type of high intensity proton
synchrotron, the chromaticity, space charge effects and magnetic field tracking
errors between the quadrupoles and the dipoles can induce beta function
distortion and tune shift, and induce resonances. In this paper the combined
effects of chromaticity, magnetic field tracking errors and space charge on
beam dynamics at CSNS/RCS are studied systemically. 3-D simulations with
different magnetic field tracking errors are performed by using the code ORBIT,
and the simulation results are compared with the case without tracking errors.
