Radiant energy – Ionic separation or analysis – Cyclically varying ion selecting field means
Patent
1995-07-27
1996-09-24
Berman, Jack I.
Radiant energy
Ionic separation or analysis
Cyclically varying ion selecting field means
250291, 250294, 250296, H01J 4942
Patent
active
055593275
ABSTRACT:
A generally circular mass spectrometer and ion filters used therein have hyperbolic pole pieces which can be machined by diamond turning. In a quadrature assembly, two pole segments can be identical and provide the outer arcuate pole surfaces, and two segments can be identical and provide the inner arcuate pole surfaces opposite from the outer pole surfaces. A support plate has an arcuate outer surface which engages alignment surfaces of the pole segments, the alignment surfaces and outer support surfaces being machined by turning. In a quadrapole, one outer pole piece and one inner pole piece are mounted on each support surface of the plate with the alignment surfaces in abutment with the support plate outer surface for accurate alignment. An outer pole segment on one support surface is electrically connected to an inner pole segment on the opposing support surface. Each support segment has a plurality of spokes for mounting to the support plate. The spokes for an outer pole segment and an inner pole segment mounted on one surface of the support plate are interleaved. A single mounting bolt through each support spoke engages a machined hole in the support plate and holds an upper pole segment to its opposing lower pole segment.
REFERENCES:
patent: 2520813 (1950-08-01), Rudenberg
patent: 3715581 (1973-02-01), Matsuda
patent: 3757115 (1973-09-01), Ball
patent: 4158771 (1979-06-01), Beeck et al.
patent: 4885470 (1989-12-01), Abbott
patent: 4885500 (1989-12-01), Hansen et al.
patent: 4949047 (1990-08-01), Hayward et al.
patent: 5298745 (1994-03-01), Kernan et al.
patent: 5373157 (1994-12-01), Hiroki et al.
patent: 5389785 (1995-02-01), Steiner et al.
patent: 5420425 (1995-05-01), Bier et al.
Bear Instruments, Inc.
Berman Jack I.
Nguyen Kiet T.
Woodward Henry K.
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