  For the purpose to produce high intensity, multiply charged metal ion beams,
the DUHOCAMIS (dual hollow cathode ion source for metal ions) was derived from
the hot cathode Penning ion source combined with the hollow cathode sputtering
experiments in 2007. It was interesting to investigate the behavior of this
discharge geometry in a stronger magnetic bottle-shaped field. So a new test
bench for DUHOCAMIS with a high magnetic bottle-shaped field up to 0.6 T has
been set up at Peking University, on which have been made primary experiments
in connection with discharge characteristics of the source. The experiments
with magnetic fields from 0.13 T to 0.52 T have shown that the magnetic flux
densities are very sensitive to the discharge behavior: discharge curves and
ion spectra. It has been found that the slope of discharge curves in a very
wide range can be controlled by changing the magnetic field as well as
regulated by adjusting cathode heating power. On the other hand, by comparison
of discharge curves between dual hollow cathode discharge (DHCD) mode and PIG
discharge mode, it was found a much stronger magnetic effect occurred on DHCD
mode. In this paper, the new test bench with ion source structure is described
in detail; and main experimental results are presented and discussed, including
the effects of cathode heating power and magnetic flux density on discharge
characteristics, also the ion spectra. The effects of the magnetic field on the
source operating are emphasized, and a unique behavior of the DUHOCAMIS
operating in the high magnetic field is expected and discussed especially.
