Ion Trapping, Storage, and Ejection in Structures for Lossless Ion Manipulations.

Area of Science:

• Analytical Chemistry
• Physical Chemistry
• Instrument Development

Background:

• Ion manipulation techniques are crucial for various analytical applications.
• Existing methods often face limitations in efficiency, storage time, or complexity.
• Development of novel trapping systems is needed for enhanced ion control.

Purpose of the Study:

• To construct and evaluate a new Structures for Lossless Ion Manipulations (SLIM) module.
• To investigate the ion trapping capabilities of the SLIM module at elevated pressures (4 Torr).
• To assess ion accumulation efficiency, storage duration, and ejection characteristics.

Main Methods:

• Fabrication of a SLIM module using parallel printed circuit boards (PCBs) with patterned electrode arrays.
• Application of radiofrequency (RF) voltages to inner rung electrodes and direct current (DC) potentials to guard electrodes for ion confinement.
• Introduction of an axial DC field by varying potentials on inner rung electrodes for ion transport control.

Main Results:

• Successful trapping and accumulation of positive ions with up to 100% efficiency.
• Demonstrated ion storage for at least 5 hours with negligible signal loss.
• Achieved rapid ejection of stored ions from the SLIM trap.

Conclusions:

• The developed SLIM module exhibits high efficiency and long-term stability for ion trapping.
• The system operates effectively at a pressure of 4 Torr, expanding potential applications.
• These findings establish a foundation for developing more sophisticated SLIM devices for complex ion manipulations.