Speaker
Sebastian Rothe
(Johannes-Gutenberg-Universitaet Mainz (DE))
Description
At ISOLDE RILIS isotopes are resonantly ionized by high pulse repetition rate wavelength-tunable lasers. In recent years the performance of RILIS was substantially improved due to upgrade stages of the laser setup. The dye laser installation has been completely renewed including the replacement of copper vapor pump lasers by solid state Nd:YAG lasers. As part of the RILIS upgrade program, a complementary fully solid state laser system based on 10 kHz repetition rate Titanium Sapphire (Ti:Sa) lasers has been built at CERN in collaboration with Mainz University. On account of their advantages in terms of long-term stability and reliability, Ti:Sa lasers are used or planned to be used at the majority of on-line radioactive ion beam facilities worldwide. In the beginning of 2011 the new Ti:Sa laser system was installed at ISOLDE RILIS alongside the dye laser system. Since then, the Ti:Sa lasers have been used for a number of on-line experiments and their compatibility with the dye lasers and expected performance was demonstrated. With the implementation of Ti:Sa lasers the range of elements accessible with RILIS is extended. In particular, an efficient ionization scheme of astatine has been developed and the ionization potential of At atoms has been measured for the first time. The improved flexibility offered by the new dual laser system has greatly reduced the switching time from one element to another, making it possible for more physics runs to be scheduled.
Primary author
Sebastian Rothe
(Johannes-Gutenberg-Universitaet Mainz (DE))
Co-authors
Bruce Marsh
(CERN)
Klaus Wendt
(Johannes-Gutenberg-Universitaet Mainz (DE))
Ralf Erik Rossel
(Johannes-Gutenberg-Universitaet Mainz (DE))
Valentine Fedosseev
(CERN)
