The gated electrostatic mass spectrometer (GEMS): definition and preliminary results.

Journal of the American Society for Mass Spectrometry
Federico A HerreroJeffrey G Lee

Abstract

GEMS is a new type of time-of-flight mass spectrometer based on an electrostatic energy analyzer. Mass resolution equals the energy analyzer kinetic energy resolution, which is set by its slit size. In GEMS, monochromatic ions enter the entrance slit at random times, and the gated ion deflection produced by the electrostatic field in the analyzer rejects ions that are inside the analyzer at gate onset, detecting those entering the analyzer after gate onset. This provides mass separation while overcoming the temporal and spatial spread problems typical of TOF applications. Paradoxically, GEMS works because all ion masses follow identical trajectories. GEMS is easily multiplied into two-dimensional arrays to increase sensitivity in space applications, requires relatively low voltages, and uses only a few electrical connections. Thus, it is easy to package GEMS as a small, low-power instrument for applications in harsh environments. A disadvantage of GEMS is that its output is the integral of the TOF spectrum and the derivative of the raw data must be taken, a procedure that is likely to add noise. A version of GEMS detecting un-deflected ions (u-GEMS) has been tested to demonstrate the time-integrated feature of the raw data but ...Continue Reading

References

May 5, 2000·Mass Spectrometry Reviews·M GuilhausV Mlynski
Mar 6, 2008·Mass Spectrometry Reviews·Nasrin Mirsaleh-KohanRobert N Compton

❮ Previous
Next ❯

Citations

Sep 15, 2009·Journal of the American Society for Mass Spectrometry·Huanwen ChenRenato Zenobi
Oct 16, 2009·Expert Review of Anticancer Therapy·Fernando RiveraLourdes Gutiérrez-Sanz
Mar 3, 2011·Medical Physics·R LopesN Betrouni

❮ Previous
Next ❯

Related Concepts

Related Feeds

Cajal Bodies & Gems

Cajal bodies or coiled bodies are dense foci of coilin protein. Gemini of Cajal bodies, or gems, are microscopically similar to Cajal bodies. It is believed that Cajal bodies play important roles in RNA processing while gems assist the Cajal bodies. Find the latest research on Cajal bodies and gems here.

Related Papers

Journal of the American Society for Mass Spectrometry
Timothy P GriffinOliver Gomez
Journal of the American Society for Mass Spectrometry
Stephen Taylor, Veronica M Bierbaum
Journal of the American Society for Mass Spectrometry
Daniel E AustinSamuel E Tolley
Journal of the American Society for Mass Spectrometry
Harry F HemondMichael Hemond
© 2022 Meta ULC. All rights reserved