H. Raimbaulthartmann et al., A CYLINDRICAL PENNING TRAP FOR CAPTURE, MASS-SELECTIVE COOLING, AND BUNCHING OF RADIOACTIVE ION-BEAMS, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 126(1-4), 1997, pp. 378-382
A Penning trap ion accumulator, cooler, and buncher for low-energy ion
beams has been developed for the ISOLTRAP mass spectrometer at ISOLDE
/CERN. A cylindrical electrode configuration is used for the creation
of a nested trapping potential. This is required for efficient accumul
ation of externally produced ions and for high-mass selectivity by buf
fer gas cooling. The design goal of a mass resolving power of about 1
x 10(5) has been achieved, Isobar separation has been demonstrated for
radioactive rare-earth ion beams delivered by the ISOLDE on-line mass
separator.