Radiant energy – With charged particle beam deflection or focussing – With detector
Reexamination Certificate
2004-05-28
2008-10-14
Wells, Nikita (Department: 2881)
Radiant energy
With charged particle beam deflection or focussing
With detector
C250S283000, C250S286000, C324S071300, C324S248000
Reexamination Certificate
active
07435970
ABSTRACT:
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 super conductor 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 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.
REFERENCES:
patent: 4687987 (1987-08-01), Kuchnir et al.
patent: 5166777 (1992-11-01), Kataoka
patent: 2007/0229057 (2007-10-01), Watanabe et al.
patent: 64-18280 (1989-01-01), None
patent: 7-135099 (1995-05-01), None
patent: 2000-275289 (2000-10-01), None
patent: 2001-66351 (2001-03-01), None
patent: 2003-21670 (2003-01-01), None
K. Grohmann et al., “A Cryodevice for induction monitoring of DC electron or ion beams with nano-ampere resolution”, Superconducting Quantum Interference Devices and Their Applications, 1977, p. 311-315.
M. Kuchnir et al., “Sqid Based Beam Current Meter”, IEEE Transactions on Magnetics, vol. Mag-21, No. 2, 1985, pp. 997-999.
Andreas Peters et al., “A Cryogenic Current Comparator for the absolute measurement of nA beams”, AIP Conf. Proc. 451 (Beam Instrumentation Workshop), 1998, p. 163.
L. Hao et al., “Design and performance of an HTS current comparator for charged-particle-beam measurements”, IEEE Transactions on Applied Superconductivity, vol. 11, No. 1, 2001, pp. 635-638.
Nippon Butsuri Gakkai Shi, vol. 54, No. 1, 1999, pp. 34-40, with English Translation.
Ikeda Tokihiro
Kase Masayuki
Katayama Takeshi
Kawaguchi Takeo
Watanabe Shin-ichi
Birch Stewart Kolasch & Birch, LLP.
Riken
Wells Nikita
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