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Linearized dipolar excitation and detection and quadrupolarized axialization in a cylindrical ion cyclotron resonance ion trap

✍ Scribed by Shenheng Guan; Yulin Huang; Alan G. Marshall

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
533 KB
Volume
30
Category
Article
ISSN
1076-5174

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✦ Synopsis

Abstract

Although cylindrical Penning ion traps are commonly used in atomic physics and in Fourier transform ion cyclotron resonance mass spectrometry (FT‐ICRMS or FTMS), such traps offer far from ideal dipolar excitation/detection and azimuthal quadrupolar axialization performance. Here it is shown that by applying r.f. voltages of just two (± V~0~) or three (0, ± V~0~) different amplitudes to appropriately spaced electrode segments, a cylindrical trap can produce nearly linear dipolar excitation/detection and nearly azimuthal quadrupolar excitation for ion axialization. Moreover, voltages are applied directly, rather than through a complex resistive or capacitive voltage dividing network as in prior designs. Advantages of the present design are confirmed by potential simulations and signal harmonic analysis.

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