T. Tominaka
Clemson University
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by T. Tominaka.
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167) | 1997
Toshihiro Kawaguchi; Tadashi Kubo; Toshinori Mitsumoto; Hiroki Okuno; T. Tominaka; Jason W. Kim; S. Fujishima; K. Ikegami; N. Sakamoto; S. Yokouchi; Tetsuo Morikawa; Y. Tanaka; Akira Goto; Y. Yano
Design study of the superconducting sector magnets for the RIKEN superconducting ring cyclotron is described. Structures, magnetic forces, superconducting coils and a cryogenic system are discussed. Special features are, the cold pole arrangement, the supporting structure for huge magnetic forces, and the cryogenic stable coils.
IEEE Transactions on Applied Superconductivity | 2004
Akira Goto; Hiroki Okuno; J. Ohnishi; T. Tominaka; S. Fujishima; K. Ikegami; Nobuhisa Fukunishi; Yoshitoshi Miyazawa; Toshinori Mitsumoto; Y. Yano
The sector magnets of the K2500-MeV superconducting ring cyclotron (SRC), which is under construction for the RIKEN RI beam factory, are described. The SRC consists of six sector magnets, four rf resonators, etc. each sector magnet is 7.2 m in length and 6 m in height and 800 t (metric ton) in weight; the sector angle is 25 deg. The required maximum magnetic field is 3.8 T. the superconductor for the main and trim coil has a rectangular shape (8 mm by 15 mm) consisting of a Rutherford-type NbTi cable located at the center of an Al-alloy stabilizer housing. The main coil is bath-cooled and the trim coil is directly cooled. Each component of the sector magnet as well as the cryogenic cooling system was completed in the spring of 2003.
IEEE Transactions on Applied Superconductivity | 2004
Hiroki Okuno; S. Fujishima; T. Tominaka; J. Ohnishi; Kumio Ikegami; Akira Goto; Y. Yano
K2500 - superconducting ring cyclotron with 6-sectors is being constructed at RIKEN as one of the energy booster of the existing K540 ring cyclotron. The bending magnet for beam injection should be superconducting. Required fields are 3.8 T and radius of the coils is 1.2 m. After the fabrication, it was cooled down and excited. The magnet reached the designed field with one quench and training effect were clearly observed, which shows that it will works well to inject the beam into the superconducting cyclotron.
IEEE Transactions on Applied Superconductivity | 2002
T. Tominaka; Nobuhisa Fukunishi; Akira Goto; J. Ohnishi; Hiroki Okuno; Y. Yano
For the design of the protection system of the superconducting main coils of the RIKEN superconducting ring cyclotron, the quench characteristics is calculated in terms of current decay, temperature rise, voltage development etc., using the computer program QUENCH-M. The AC losses and pressure rise pertaining the quench are also estimated.
IEEE Transactions on Applied Superconductivity | 1999
Takeo Kawaguchi; Hiroki Okuno; Akira Goto; Toshinori Mitsumoto; T. Tominaka; Y. Yano
Design, especially about the structure and quench stability, of the superconducting sector magnets for the RIKEN superconducting ring cyclotron is described. Special features of the sector magnets are the triangular shape superconducting coil, cold pole arrangement for supporting of the huge magnetic forces and the cryogenic stable coils. A full-scale superconducting model is now under construction as a prototype sector magnet.
international integrated reliability workshop | 1998
Hiroki Okuno; T. Tominaka; Seitaro Fujishima; Toshinori Mitsumoto; Tadashi Kubo; Toshihiro Kawaguchi; Jason W. Kim; K. Ikegami; N. Sakamoto; S. Yokouchi; Tetsuo Morikawa; Takeshi Tanaka; Akira Goto; Y. Yano
In the RI beam factory project, an intermediate-stage ring cyclotron and a six-sector superconducting ring cyclotron (IRC and SRC) are designed to boost the energy of the ion beams available from the existing RIKEN ring cyclotron (RRC). The output energies designed to the SRC are 400 MeV/u for light ions such as carbon and are 150 MeV/u for heavy ions such as uranium. In the present report, we describe the recent status of design study of the injection and extraction systems for the SRC.
IRW | 1998
Hiroshi G. Okuno; T. Tominaka; Seitaro Fujishima; Toshinori Mitsumoto; Tadashi Kubo; Toshihiro Kawaguchi; Jason W. Kim; Keiichi Ikegami; Nobuo Sakamoto; S. Yokouchi; Tetsuo Morikawa; Takeshi Tanaka; Akira Goto; Yoshihisa Yano
Archive | 2004
Ring Cyclotron; Akira Goto; Hiroki Okuno; J. Ohnishi; T. Tominaka; S. Fujishima; K. Ikegami; Nobuhisa Fukunishi; Yoshitoshi Miyazawa; Toshinori Mitsumoto; Y. Yano
Archive | 2002
Ring Cyclotron; T. Tominaka; Nobuhisa Fukunishi; Akira Goto; J. Ohnishi; Hiroki Okuno; Y. Yano
international conference on telecommunications | 1998
Hiroshi G. Okuno; T. Tominaka; Seitaro Fujishima; Toshinori Mitsumoto; Tadashi Kubo; Toshihiro Kawaguchi; Jason W. Kim; Keiichi Ikegami; Nobuo Sakamoto; S. Yokouchi; Tetsuo Morikawa; Takeshi Tanaka; Akira Goto; Yoshihisa Yano