Abstract
An ISOL-based radioactive nuclear beam facility at KEK-Tanashi has been constructed. The linac complex to accelerate radioactive beams comprises a 25.5 MHz split coaxial RFQ (SCRFQ) and a 51 MHz interdigital-H (IH) linac, and accelerates heavy ions up to 1 MeV/u. Beam tests using stable nuclear beam have been done in order to examine the performance of the linacs. Acceleration tests of a radioactive nuclear beam was also performed. This facility is a prototype for the exotic nuclei arena (E-arena) of the proposed Japanese Hadron Facility (JHF), in which 3 GeV, 10 μA protons is used as a primary beam, and a radioactive nuclear beam is accelerated up 6.5 MeV/u by an extension of the IH linac. In this paper, outline, present status and future plan of the facility are reported with emphasis on the heavy ion linacs.
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