多段式高分解能質量分析器

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概要

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• A mass spectrometer which may have very large mass dispersion and resolving power is proposed. Consider the tandem combination of n cylindrical electrostatic analyzers of sector type (opposite deflections to each other) with the same a<SUB>e</SUB>, Φ<SUB>e</SUB>, and magnification X(<1)each, and the tandem combination of n homogeneous magnetic analyzers of sector type (opposite deflections to each other) with the same a<SUB>m</SUB>, Φ<SUB>m</SUB> and magnification 1/X each. These two groups of the fields are connected in tandem so that the deflection in the final electric field and that in the first magnetic field are in the same sense. The double focusing condition is satisfied if a<SUB>e</SUB>=a<SUB>m</SUB>=a. The total magnification of the image is 1, while the mass dispersion at the final image is given as follows:<BR> D<SUB>m</SUB>=a/2(1+1/X)(1+1/X+1/X<SUP>2</SUP>;+…+1/X<SUP>n-1</SUP>)γ.<BR> If X is very small and n large, then very large mass dispersion and resolving power may be expected. For example, in the case X=1/3, n=3, a<SUB>e</SUB>=a<SUB>m</SUB>=100 cm, Φ<SUB>e</SUB>=63°39′, Φ<SUB>m</SUB>=90°, mass dispersion of 2600 γ cm and resolving power of 26, 000, 000/sμ are expected.

• 日本質量分析学会の論文

著者

• 松田 久

  大阪大学教養部物理学教室

• 松田 久

  大阪大学教養

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