Hoxan Corporation

Koji Fujioka

Atsushi Wakusawa

Kazutake Matsumoto

A magnetic noise reducing device can effectively produce a practically noiseless space that can reduce environmental magnetic noise harmful for measuring biomagnetism with a high magnetism damping factor in low frequency range. The magnetic noise reducing device comprises a SQUID flux meter 1 and a pair of noise canceling coils 2 as minimum components, the feedback current I produced by the SQUID flux meter 1 being supplied to the noise canceling coils 2, the magnetic flux detecting coil of the SQUID flux meter being arranged within a specific central space 4 defined by the noise canceling coils 2 for effective reduction of magnetic noise within that space.

Active shielding device based on SQUID and feedback therefrom for the

An apparatus for measuring the melting and boiling points of gas has a heat insulating tank, an inner tank within the insulating tank, a sample cell within the inner tank with a sample gas temperature measuring system. A piping system is provided having a heating route and a cooling route. The heating route has a heating flow rate control valve and a heating heat exchanged heated by a heating source connected in series with the control valve. The cooling route has a cooling flow rate control valve and a cooling heat exchanger connected in series with the cooling flow rate contorl valve. The heating and cooling routes are in parallel. The heating source for heating the heat exchanger has a Joule-Thomson expansion valve while the cooling part for cooling the cooling heat exchanger is coupled to a compressor for compressing and supplying a refrigerant such as Freon.

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Tsukuba, Japan

Koji Fujioka