AN EBIS FOR USE WITH SYNCHROTRON-RADIATION

At RIKEN we have constructed an electron-beam ion source (EBIS) for use with synchrotron radiation to study the photoionization process of highly charged ions. The reason for using an EBIS as an ion target is that it can produce several orders of magnitude higher density ion targets than conventional ion sources in an ultra-high-vacuum environment. Calculations have shown that ion densities between 10(8) and 10(10) ions/cm3, under various operating conditions, are obtainable in an EBIT. The apparatus will also be used to test the photon beam ion source (PHOBIS) mode of operation to create low-energy multicharged ions by replacing the electron beam with synchrotron radiation.