A proposal for an additional beamline to the TRIUMF ISAC facility

The present ISAC facility at TRIUMF is fed by one beamline, beamline 2A, that can direct beam to one of two target locations. One of these targets has been in use since ISAC was commissioned; the second is currently being commissioned. The number of proposals for experiments at ISAC are such that we feel the need to deliver more simultaneous radioactive ion beams. A proposal has been made for an another beamline to ISAC so as to make additional beams available. Through partial extraction by H^- stripping, this proposed line would extract a 450-500 MeV beam from extraction port 4 of the TRIUMF cyclotron. A fast switching system would be used to feed an additional two target stations, each equipped with its own mass-separator system. These new target stations will allow target and ion-source development, and also at least three simultaneous experiments at ISAC. In addition to these two target stations, provision for a 200 μA beam dump has been made.