The internal and external ion sources for the Felsenkeller underground accelerator

摘要

In order to determine the cross sections of astrophysical reactions at relevant energies the new Felsenkeller underground laboratory, Germany, houses a 5 MV Pelletron accelerator. The accelerator provides stable and high-intensity ion beams which are much-needed in low-background environments. The properties of the two ion sources used in the new accelerator facility are discussed: The external 134 MC-SNICS cesium sputter source providing carbon beams in tandem mode and the internal radio frequency source for hydrogen and helium beams in single-ended mode.