Construction and commissioning of K110 AVF cyclotron

Arakawa, Kazuo; Yokota, Wataru; Agematsu, Takashi; Nakamura, Yoshiteru; Ishibori, Ikuo; Kurashima, Satoshi; Miyawaki, Nobumasa; Okumura, Susumu; Kamiya, Tomihiro; Nara, Takayuki; Fukuda, Mitsuhiro*

The TIARA facilities (Takasaki Ion Accelerators for Advanced Radiation Application: TIARA) have been constructed at Takasaki Radiation Chemistry Research Establishment (Takasaki Advanced Radiation Research Institute) under 6-year program from 1988. The first phase of the construction including those of a K110 AVF cyclotron and a 3 MV tandem accelerator was complete in October 1991. Large AVF cyclotrons have been used mostly for fundamental nuclear physics and medical applications to radiation therapy and radioisotope production so far. The JAEA K110 AVF cyclotron is the first one dedicated to R&D in materials science and other irradiation purpose. This cyclotron facility consists of three external ion sources, an injection line, a K110 AVF cyclotron, eight main beam transport lines, and a control system. The first beam, 50 MeV He, was extracted from the cyclotron in March 1991. This Report describes an outline of the K110 AVF cyclotron system and results of performance tests.