Stabilization of a magnetic section of a mass spectrometer

Details Stabilization of a magnetic section of a mass spectrometer Stabilization of a magnetic section of a mass spectrometer

2007-05-29

2007-05-29

Berman, Jack I. (Department: 2881)

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

C250S282000

Reexamination Certificate

active

11097465

ABSTRACT:
An analytical instrument, such as a mass spectrometer, the instrument having a magnetic section with a controllable electromagnetic field. Controlling the electromagnetic field is accomplished by controlling a temperature of a base plate within the magnetic section, by controlling a current passing through an electromagnetic coil disposed within the magnetic, by disposing a magnetic shunt across a portion of a yoke of the magnet, or by any of the above either independently or in combination. The magnetic shunt is configured to have a temperature coefficient of remnant flux density that is opposite the temperature coefficient of remnant flux density of a first pair of permanent magnets located within the magnetic section.

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patent: 674729 (1952-07-01), None
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Van Der Walt, N. T., “The Control and Stabilization of the Magnetic Field for a Mass Spectrometer,” The Review of Scientific Instruments, 24(6): 413-416, Jun. 1953.
Hadfield, D., et al., “Permanent Magnets for Spectrographs and Nuclear Physical Research,” British Journal of Applied Physics, 3(6): 199-202, Jun. 1952.
Dodson, M. H., “Stabilization of Magnetic Field Using a Flux-Integrating Circuit,” Journal of Physics E. Scientific Instruments, 3(9): 708-710, Sep. 1, 1970.

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