SOURCE-ANALYZER COUPLING IN THE QUADRUPOLE MASS FILTER

被引：14

作者：

DAWSON, PH

机构：

[1] Division of Physics, Microstructural Science Laboratory, National Research Council, Ottawa

来源：

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES | 1990年 / 100卷

关键词：

D O I：

10.1016/0168-1176(90)85066-B

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Transmission/resolution relationships in the quadrupole mass filter are calculated for sources of different emittance characteristics. The previously predicted regions of source limited and analyser limited operation are demonstrated. Some quantitative information is obtained about the resolution at which the transition occurs for a source of a given size of emittance. Contrary to previous qualitative predictions transmission under analyser limited conditions is proportional to 1/R rather than 1/R2. The effects of emittance shape and orientation in the phase plane are considered. Such changes might result from poor choice of focusing conditions between the source and the analyser. A "hollow beam" source is also examined. Some approximate information about peak shapes with various source configurations is obtained for ions passing many cycles in the r.f. field. © 1990.

引用

页码：41 / 50

页数：10

共 9 条

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