On November 9, CSNS has made another big progress. The average beam power is achieved 10 kW when the proton beam with a repetition rate of 25 Hz collided on the tungsten target. This means the parameter of the average beam power has met the acceptance goal of the CSNS project.
CSNS is composed of a linac with a modest but upgradable energy of 80 MeV, and a rapid cycling synchrotron (RCS) with the energy of 1.6 GeV and a repetition rate of 25 Hz. At present the linac can only provide an energy of 60 MeV, since one of the four klystrons for drift tube linac (DTL) was returned to the factory in the USA due to a quality problem. In April, the linac finished beam commissioning with the beam energy of 60 MeV. In June, the proton beam was accelerated to 1.6 GeV in RCS. To reduce the beam loss, the CSNS team used a single-shot mode for beam commissioning. On August 28, the first neutron beam was obtained from the tungsten target. It is until November 1 that the CSNS team began to use a continuous beam mode with a repetition rate of 1 Hz and received neutron signals at all three initial instruments during a joint beam commissioning. On November 9, the proton beam pulses with a repetition rate of 25 Hz collided on the tungsten target, which received an average beam power of more than 10 kW.