Satsumasendai, Japan
Satsumasendai, Japan

Time filter

Source Type

Tanaka K.H.,High Energy Accelerator Research Organization | Hirose E.,High Energy Accelerator Research Organization | Takahashi H.,High Energy Accelerator Research Organization | Agari K.,High Energy Accelerator Research Organization | And 22 more authors.
IEEE Transactions on Applied Superconductivity | Year: 2010

More than 50 radiation-resistant electromagnets were constructed for the primary proton and the secondary particle beam lines of the Hadron Experimental Hall of Japan Proton Accelerator Research Complex (J-PARC). The main radiation-resistant technologies we employed were the Polyimide-resin Insulation conductor for magnets at the relatively low radiation exposure and the Mineral Insulation Cable for magnets at the seriously high radiation environment. The remote handling and maintenance scheme of radiation-resistant magnets for seriously high radiation environment was developed also based on the Chimney magnet technology and applied to magnets near the production target in the Hadron Hall. On January 27th 2009, the first proton beam was successfully introduced to the Hadron Hall from the main accelerator of J-PARC, i.e. 50 GeV Proton Synchrotron. On February 10th, the secondary particles were extracted to the experimental area of the Hadron Hall through the secondary particle beam line. No serious problem happened on magnets of both primary proton and the secondary particle beam lines until the end of the beam operation scheduled on February 26th. © 2006 IEEE.


Takahashi H.,High Energy Accelerator Research Organization | Agari K.,High Energy Accelerator Research Organization | Hirose E.,High Energy Accelerator Research Organization | Ieiri M.,High Energy Accelerator Research Organization | And 21 more authors.
IEEE Transactions on Applied Superconductivity | Year: 2010

The target station in the hadron experimental facility at J-PARC consists of a production target and a huge vacuum chamber in which several secondary-beam-line magnets can work. This vacuum chamber system aims to remove the vacuum beam pipe from the magnet gap, because the cooling of the beam pipe is the most serious problem in the high intensity beam facility. We have developed indirectly cooled radiation-resistant magnets for the hadron target station. Their coils are made of solid-conductor type mineral-insulation cables and stainless-steel water pipes. They have the great advantages that electric circuits can be completely independent of water pass. The mechanical strength and the insulation performance of the coil are significantly improved also because the insulation water pipes can be avoided from the water pass. A C-type sector dipole and a figure-8-type quadrupole magnet have been fabricated by using indirectly cooled radiation-resistant magnet technology, and installed in the vacuum chamber. We have succeeded to operate them in vacuum stably with the current of DC 1000 A by improving the end structure of the MIC coils and increasing their emissivity. These magnets have been used for the real beam operation without any serious problems. © 2006 IEEE.

Loading TOKIN Machinery Corporation collaborators
Loading TOKIN Machinery Corporation collaborators