发明授权
- 专利标题： Temperature stable multipole mass filter and method therefor
- 专利标题（中）： 温度稳定的多通道滤波器及其方法
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申请号： US692846申请日： 1976-06-04
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公开(公告)号： US4032782A公开(公告)日： 1977-06-28
- 发明人: Ronald D. Smith , William J. Fies , John R. Reeher , Michael S. Story
- 申请人： Ronald D. Smith , William J. Fies , John R. Reeher , Michael S. Story
- 申请人地址： CA Sunnyvale
- 专利权人： Finnigan Corporation
- 当前专利权人： Finnigan Corporation
- 当前专利权人地址： CA Sunnyvale
- 主分类号： G01N27/62
- IPC分类号： G01N27/62 ; H01J49/42 ; H01J39/34
摘要：
A method of selecting a material for the construction of a multipole mass filter that is temperature stable or in other words, the R.sub.o parameter remains invariant with change in temperature. The coefficients of thermal expansion of the quadrupole rods and mounting structure are chosen so that a constant ratio of the two is provided which in turn is determined by the geometrical construction of the filter.