Mass spectrometer with adjustable aperture mechanism

Details Mass spectrometer with adjustable aperture mechanism Mass spectrometer with adjustable aperture mechanism

1993-09-10

1994-12-27

Berman, Jack I.

Radiant energy

Ionic separation or analysis

250298, 250296, 250283, H01J 4902

Patent

active

053767870

ABSTRACT:
In a mass spectrometer, an aperture defining a beam path to a particle detector (4) is defined by a fixed aperture (5) and a cover (6) mounted on respective carriage assemblies (50,49) running along a beam 46. When a shaft (36) drives carriage (50), a rod (22) on carriage (49) is engaged by an end of a slot (21) of carriage (50), so that both carriages can be moved to a desired aperture location. After reaching this position, carriage (50) may be moved in the opposite direction, within a range defined by the length of the slot (22), without causing movement of carriage (49), to vary the amount by which member (6) covers member (5) and to thereby define a desired aperture width. A plurality of carriages can be coupled to one another in this manner to form a chain of apertures whose positions and widths may be varied independently using a single drive shaft (36). The fixed aperture (5) and cover ( 6) may be replaced by a pair of opposed aperture-edge defining members in the same plane.

REFERENCES:
patent: 2852684 (1958-09-01), Payne, Jr.
patent: 3228291 (1966-01-01), Miller
patent: 3433945 (1969-03-01), Erickson et al.
patent: 3522428 (1970-08-01), Powers
patent: 3546450 (1970-12-01), Burns
patent: 3655963 (1972-04-01), Brunnee et al.
patent: 4524275 (1985-06-01), Cottrell
patent: 4595831 (1986-06-01), Hetherington, Jr.

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