A Fourier transform time-of-flight mass spectrometer. A SIMION calculation approach
Abstract
A new kind of approach to time-of-flight type spectrometers is presented on the basis of SIMION calculations. The detector studied is a short cylindrical tube capacitor closed with parallel plates at both ends. The main principle of operation is to force ions of equal energy to circulate in the volume between the two tubes on a path of equal radius and measure their flight times pro revolution which corresponds to the frequency of oscillation. By performing spectral analysis on the received signal through transformation from the time domain to frequency space the different masses can be detected. To study the expected performance of the FT-TOF detector, calculations of ion trajectories have been made by varying the dimensions and electric potentials of the electrodes. The effect of the beam position, variations in the angle of entrance and ion energy to the trajectories was calculated to monitor the resolution that is achievable.
- Publication:
-
International Journal of Mass Spectrometry and Ion Processes
- Pub Date:
- January 1995
- DOI:
- Bibcode:
- 1995IJMSI.141...67O
- Keywords:
-
- Fourier transform;
- SIMION;
- Time-of-flight