An Orbital Trap Mass Analyzer Using a Hybrid Magnetic-Electric Field: A Simulation Study

Area of Science:

• Analytical Chemistry
• Mass Spectrometry
• Physics

Background:

• Orbital ion traps are crucial for mass analysis, but achieving high resolution remains a challenge.
• Hybrid magnetic-electric fields offer potential for enhanced ion confinement and manipulation.
• Previous designs have limitations in achieving the desired performance metrics for advanced applications.

Purpose of the Study:

• To design and simulate a novel orbital ion trap mass analyzer.
• To investigate the performance of a hybrid magnetic-electric field configuration.
• To evaluate the mass resolution capabilities of the proposed device.

Main Methods:

• Design of a rotationally symmetrical orbital ion trap.
• Simulation of ion injection and orbital motion using SIMION 8.1 and Lua scripting.
• Investigation of hybrid electric and magnetic fields within a toroidal space.
• Detection of image charge signals via 12 pairs of sector electrodes.
• Mass resolution evaluation using Fast Fourier Transform (FFT).

Main Results:

• Successful simulation of ion dynamics within the hybrid field trap.
• Optimization of electric and magnetic field parameters.
• Achieved simulated resolving power exceeding 79,000 Full Width at Half Maximum (FWHM).
• Demonstrated high performance at a magnetic induction intensity of 0.5 Tesla.

Conclusions:

• The designed orbital ion trap mass analyzer with a hybrid field shows significant promise.
• The simulation results indicate a high potential for achieving excellent mass resolution.
• This technology could advance applications requiring precise mass analysis.