STATUS-REPORT ON THE FRANKFURT EBIS RESEARCH-PROGRAM

The Frankfurt superconducting EBIS has been run beyond the space-charg e neutralization limit making use of the evaporative cooling technique showing a continuous transition between EBIS to EBIT operation. The e xperience gained on the performance of this more sophisticated source has been employed to develop simpler EBIS sources: The MEDEBIS using a warm solenoid will demonstrate rapid extraction of bare nuclei for si ngle turn injection into a synchrotron for cancer therapy. The PPM-foc used EBIS with permanent magnets and the XEBIS without any focusing ma gnetic field have been developed to demonstrate by its reduced power c onsumption and size to be more suitable to small laboratories. High em ission current densities from a laser heated tip cathode offer the for mation of a well-defined high current density beam. Several spectromet ers have been built and installed to offer diagnostics for the EBIS op eration as well as atomic physics research. Ionization measurements ca n be performed using the magnetic switchyard, an external electrostati c and magnetic spectrometer allows to study secondary electron emissio n by highly charged ions as well as to ionize and analyse sputtered at oms.