Restoration of RI-beams from a projectile fragment separator by Laser Ionization gas Catcher -PALIS-

摘要

A fragment separator at heavy ion accelerator facilities is a versatile instrument to provide wide variety of radioactive isotope (RI) beams. However, more than 99.99% of precious Rl-ions are simply dumped in the slits or elsewhere in the fragment separator. A novel concept to restore such Rl-ions for parasitic slow Rl-beams is proposed. Installation of a laser ionization gas catcher in the vicinity of the first or second focal point of the fragment separator enables to collect dead isotopes in the slits. The design concept and expected performance are discussed.