  A combination of the H- stripping and phase space painting method is used to
accumulate a high intensity beam in the Rapid Cycling Synchrotron (RCS) of the
China Spallation Neutron Source (CSNS). The injection system for CSNS/RCS
consists of three kinds of magnets: four direct current magnets (BC1-BC4),
eight alternating current magnets (BH1-BH4 and BV1-BV4), two septum magnets
(ISEP1 and ISEP2). In this paper, the magnetic measurements of the injection
system were introduced and the data analysis was processed. The field
uniformity and magnetizing curves of these magnets were given, and then the
magnetizing fitting equations were obtained.
