High Energy Accelerator Research Organization

Sumitomo Chemical Company, Limited

Sumitomo Heavy Industries, Ltd.

Inter-university Research Institute Corporation High Energy Accelerator Research Organization

Takayuki Tomaru

Tomiyoshi Haruyama

Takakazu Shintomi

Toshikazu Suzuki

Hiroshi Tabuchi

Tomohiro Koyama

Hiroaki Hoshikawa

Rui Li

Kenichi Sasaki

A magnetic shielding material which can decrease the thickness by having excellent conductivity even at low temperatures of, for example, 77 K or lower, in a strong magnetic field of a magnetic flux density of 1 T or more is provide. A magnetic shielding material to be used at low temperatures of 77 K or lower in the magnetic field of a magnetic flux density of 1 T or more, comprises aluminum having a purity of 99.999% by mass or more.

Magnetic shielding material for superconducting magnet

A stationary point is set on a cold end of a cryocooler. An article is mounted on the stationary point to be cooled via the stationary point. In this case, the article can be cooled up to an extremely low temperature with isolation of vibration to the article.

Method for cooling an article using a cryocooler and cryocooler

A cryogenic refrigerator includes a first refrigerant tube and a second refrigerant tube each comprising two tubes that are arranged on a cooling stage substantially parallel to each other and communicate with each other through a gas passage formed in the cooling stage. Phase differences are provided to oscillating gas pressures in the first and second refrigerant tubes, to cancel vibration of the cooling stage. Thus, the cryogenic refrigerator can be provided which can effectively reduce the vibration of the cooling stage caused by the oscillating gas pressure and can reduce the size thereof.

Cryogenic refrigerator

Growing community of inventors

Tsukuba, Japan

Takayuki Tomaru