Accelerated Radioactive Ion Beams at TRIUMF: Present (ISAC-I) and Future
R.E. Laxdal, TRIUMF
ISAC-I at TRIUMF is now delivering both low energy and accelerated
radioactive ion beams (RIBs) for experiment. The post-accelerator for
ISAC-I includes a 35.3MHz RF Quadrupole (RFQ) to
accelerate beams of A/q<=30 from 2keV/u to 153keV/u and a post-stripper,
106MHz variable energy drift tube linac (DTL) to accelerate ions of
3<=A/q<=6 to a final energy from 0.153 to 1.53MeV/u.
Both linacs are room temperature and operate cw to preserve beam
intensity. The accelerator was fully commissioned in early 2001 with
beam (8Li) to experiment in July last year. Since then both the DRAGON
TUDA facilities have received 21Na at various energies. The design
concept, machine status and early operating experience of the
ISAC-I linear accelerator complex will be summarized.
TRIUMF has also received funding through to 2005 to proceed with an
extension to the ISAC facility, ISAC-II, to permit acceleration of
radio-active ion beams up to energies of at least 6.5MeV/u for
masses up to 150. In brief the proposed acceleration scheme would use
existing RFQ with the addition of an ECR charge state booster to achieve
the required mass to charge ratio (A/q<=30) for masses up to 150.
room temperature IH-DTL would accelerate the beam from the RFQ to 400
keV/u followed by a post-stripper superconducting linac designed to
accelerate ions of A/q<=7 to the final energy. The accelerator design
present status of the project will be presented.