BEAM CURRENT METER

WIPO Patent Application WO/2004/107463

A1

It is possible to simplify the cooling mechanism of a superconductor, significantly reduce the cost, simplify the measurement work, and reduce the time required for measurement. A beam current meter includes: a cylindrical superconductor beam current sensor arranged in a vacuum vessel in such a manner that the beam incoming into the vacuum vessel is guided to pass through a bore of the vacuum vessel and a bridge portion is formed at the outer diameter; a SQUID arranged at the bridge portion of the beam current sensor; a cylindrical superconductor magnetic shield arranged so as to surround the external diameter side of the beam current sensor in such a manner that the SQUID is positioned between the beam current sensor and the magnetic shield, so that a beam is guided to pass through the bore of the beam current sensor, thereby measuring the beam current of the beam. The beam current meter uses a freezing device as cooling means for cooling the beam current sensor, the SQUID, and the magnetic shield.

WATANABE TAMAKI (JP)
KATAYAMA TAKESHI (JP)
KASE MASAYUKI (JP)
IKEDA TOKIHIRO (JP)
WATANABE SHIN-ICHI (JP)
KAWAGUCHI TAKEO (JP)

PCT/JP2004/007346

December 09, 2004

May 28, 2004

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RIKEN (JP)
WATANABE TAMAKI (JP)
KATAYAMA TAKESHI (JP)
KASE MASAYUKI (JP)
IKEDA TOKIHIRO (JP)
WATANABE SHIN-ICHI (JP)
KAWAGUCHI TAKEO (JP)

G01R33/02; G01R33/035; G01T1/29; G01T7/00; H01J37/04; H01J37/24; H01J37/244; H01L39/04; H05H13/04; (IPC1-7): H01L39/04; G01R33/035; G01T1/29; G01T7/00; H01J37/04; H05H13/04

JP2003021670A	2003-01-24
JP2001066354A	2001-03-16
JP2000275289A	2000-10-06
JPS6418280A	1989-01-23
JPH07135099A	1995-05-23

Ueshima, Junichi (Nishi Ikebukuro 1-chome Toshima-k, Tokyo 21, JP)

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