Showa Aluminum Corporation

Seiko Instruments & Electronics Ltd.

Sukegawa Electric Co., Ltd.

National Laboratory for High Energy Physics

The Director-general of National Laboratory for High Energy Physics

Hajime Ishimaru

Shojiro Komaki

Masao Miyamoto

Masanori Nozaki

Yokichi Domeki

Shigeru Nishizaki

Masao Tezuka

Electromagnetic parts have windings composed of an inorganic insulating cable including a metal sheath, an inorganic insulating material, and conductive wires. Thereby, the windings are adapted to have higher heat resisting properties by selectively employing a material having a higher melting point and not changing its state even at temperature of about several hundred degrees Celsius as the sheath and the conductive wire.

Core winding with inorganic insulation between the inner conductor and

A coolant preservation container having vacuum space in a peripheral portion of the interior thereof for making a container member adiabatic and a partition for dividing the container member into a plurality of chamber. Each chamber has ports from and via which a coolant is taken out from and returned to the chamber. These ports are suited to circulate a coolant contained in the chamber on external cooling trap.

Coolant preservation container

A process for producing a hollow aluminum extrudate for use in a vacuum comprising the steps of hermetically closing the forward open end of a hollow shaped material immediately after extrusion, subsequently extruding a predetermined length of shaped material, cutting off the predetermined length of extruded material and hermetically closing the cut end thereof at the same time, and cutting off the closed ends. During extrusion, the inner surface of the hollow portion of the shaped material is substantially held out of contact with the atmosphere to inhibit a hydrous oxide on the inner surface while permitting formation of a compact oxide film thereon.

Process for producing hollow aluminum extrudates for use in a high

A shield-type coaxial vacuum feedthrough for connecting an external wire to lectric equipment inside a vacuum vessel, comprising a metal pin in the shape of a metal round bar, a ceramic cylinder enclosing the metal pin and a metal cylinder enclosing the ceramic cylinder, with the ceramic cylinder being partly enlarged in diameter so as to peripherally contact and fix itself to the metal cylinder, and the metal pin being reduced in diameter in that part corresponding to the enlarged part of the ceramic cylinder. Thereby, the matching of characteristic impedance can be secured even in the high-frequency region such as microwaves thereby allowing high-accuracy experiments and insuring strong endurance during the baking of the vacuum vessel.

Shield-type coaxial vacuum feedthrough

A bakable multi-pins vacuum feedthrough suitable for providing electrical connection from outside into a vacuum vessel of a synchrotron, comprising a metal cylinder and a disc-shaped ceramic pin-holder having multi-pins, wherein the pin-holder is sealingly fixed inside the cylinder at a place axially nonidentical with where the pin-holer and the multi-pins are sealingly fixed, so that favorable resistibility against high vacuum, baking, and strong radioactive rays is attained.

Growing community of inventors

Ibaraki, Japan

Hajime Ishimaru