IsoTOF

DOWNLOAD IsoTOF Example

This is a demonstration model of a planar multi-reflecting Time-of-Flight analyzer

This example illustrates a new approach for design of time-of-flight systems. Unlike conventional systems, where motion of ions is isochronous in only one (flight) direction, this new system has a property of isochronous motion in the orthogonal (drift) direction as well. The approach, applied here for design of multi-reflecting time-of-flight system, is based on planar mirrors with zig-zag like trajectories.

The idea of the IsoTOF is to create a combination of two electrostatic fields

 

 

where the first field  is optimised to ensure a space-energy focusing in the X flight direction. The second field focuses ions in the Z drift direction. As a result, the ion beam undergoes a multi-reflection motion in the X direction before it is reflected back and focused to the detector in the drift direction.

 

Such a configuration of the electrostatic field is disclosed by US20100044558 patent.

All parts for the whole model in this demonstration have been created in SIMION. These include: ion mirror, ion source with axial ejection, ion deflectors, and ion detector (as a solid box).

 

Next, all parts of the assembly have been uploaded to SIMAX as separate workbenches (WBs). Then, the respective potential arrays (PAs) have been assigned to every workbench.

The complete model in SIMAX

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