Rotary turret and reusable specimen holder for mass spectrometer

Details Rotary turret and reusable specimen holder for mass spectrometer Rotary turret and reusable specimen holder for mass spectrometer

1986-10-06

1988-05-17

Fields, Carolyn E.

Radiant energy

Ionic separation or analysis

With sample supply means

250281, H01J 4904

Patent

active

047452773

ABSTRACT:
A sample holder for use in a mass spectrometer is provided for heating a sample to discharge ions through an electrostatic field which focuses and accelerates the ions for analysis. Individual specimen holders form a plurality of filaments for heating the sample materials for ion emission. Mounting devices hold the plurality of filaments at regular spaced apart angles in a closed configuration adjacent the electrostatic field elements. A substantially solid ceramic turret is provided with a plurality of electrical contacts which engage the individual holder means for energizing the filaments and forming a corresponding plurality of radially facing, axially extending first conductive surfaces. A substantially solid stationary turret bearing member is mounted about the rotating turret with a plurality of radially biased second electrical conductive surfaces, mounted to electrically contact facing ones of the plurality of radially facing first conductive surfaces. The assembly provides a large thermal mass for thermal stability and large electrical contact areas for repeatable, stable power input for heating the sample materials. An improved sample holder is also provided having a ceramic body portion for removably engaging conductive wires. The conductive wires are compatible with a selected filament element and the sample material to be analyzed.

REFERENCES:
patent: 2756341 (1956-07-01), White
patent: 4156814 (1979-05-01), Hunt et al.

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