Development of a prototype PIG ion source with electric magnets for a compact ion microbeam system

A prototype penning ionization gauge ion source has been developed for the installation of a 1-MeV compact ion microbeam system. The ion source must generate an ion beam with high brightness and low energy while consuming a minimum of low electric power consumption and fitting within a small size. A prototype penning ionization gage (PIG) ion source with two electromagnets, which generates an ion beam from high-density plasma in a small volume passing through a cathode with a small through-hole, was designed and constructed. The prototype PIG ion source generated low-energy hydrogen ion beams with the almost same distribution of ion species as a typical PIG ion source in the preliminary tests. The brightnesses of the ion beam with all ion species and proton beam were calculated and estimated to be 80 A/(m2SrV) and 8 A/(m2SrV) using the experimentally measured beam current and on the basis of the ion distribution, respectively. These values are sufficient for the installation in a compact ion microbeam system