Status of the TRIUMP-ISAC facility for accelerating radioactive beams

ISAC, a new facility for accelerating intense beams of unstable ions, is under construction at TRIUMF. The radioactive nuclei will be produced by up to 100 A of 500 MeV protons impinging on one of two target/ion source stations located in an underground vault. The ionized beam will be transported by electrostatic ion optics to a high acceptance, high resolution mass analyser. Following mass selection the beam is transported vertically to grade level and then horizontally to either a low energy experimental area or to a system of accelerators. First, a 35 MHz CW RFQ accelerates isotopes with q/A >1/30 from 2 keV/u to 150 keV/u. Following the RFQ the beam is passed through a stripper and magnetic bend to select a charge state with q/A 1/6 prior to rebunching and injection into a CW drift tube linac (DTL) operating at 105 MHz. The output beam, with energy continuously variable from 0.15 to 1.5 MeV/u, is transported to one of a number of experimental stations. This paper briefly outlines the plans, schedule and status of the project.