发明名称 |
Rotary turret and reusable specimen holder for mass spectrometer |
摘要 |
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.
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申请公布号 |
US4745277(A) |
申请公布日期 |
1988.05.17 |
申请号 |
US19860915840 |
申请日期 |
1986.10.06 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE UNITED STATES DEPARTMENT OF ENERGY |
发明人 |
BANAR, JOSEPH C.;PERRIN, RICHARD E.;OSTRENGA, RAYMOND A. |
分类号 |
H01J49/04;(IPC1-7):H01J49/04 |
主分类号 |
H01J49/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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