  A new H^- ion source has been installed successfully and will be used to
serve the China Spallation Neutron Source (CSNS). In this paper, we report
various components of the ion source, including discharge chamber, temperature,
cooling system, extraction electrodes, analyzing magnet, remote control system
and so on. Compared to the previous experimental ion source, some improvements
have been made to make the ion source more compact and convenient. In the
present arrangement, the Penning field is generated by a pair of pole tip
extensions on the analyzing magnet instead of by a separate circuit. For the
remote control system, F3RP61-2L is applied to the accelerator online control
system for the first time. In the running of the ion source, a stable pulse H-
beam with a current of 50 mA at an energy of 50 keV is produced. The extraction
frequency and pulse width is 25 Hz and 500microsecond, respectively.
Furthermore, an emittance scanner has been installed and measurements are in
progress.
