Initial experimental characterization of a new ultra-high resolution FTICR cell with dynamic harmonization

Area of Science:

• Analytical Chemistry
• Physical Chemistry
• Spectroscopy

Background:

• Existing Penning traps have limitations in achieving ideal electric potential distributions.
• Conventional cylindrical cells with compensation sections face challenges in ion motion harmonization, especially at larger cyclotron radii.

Purpose of the Study:

• To construct and experimentally test a new Fourier transform ion cyclotron resonance (FTICR) cell.
• To investigate a novel principle for forming effective electric potential distribution in Penning traps.
• To evaluate the performance of the new cell in terms of mass resolving power and ion motion harmonization.

Main Methods:

• Development of a new FTICR cell based on electric potential space-averaging via charged particle cyclotron motion.
• Design of excitation and detection electrodes to generate a quadratic dependence of averaged electric potential on axial coordinates.
• Experimental testing of the cell's performance in a 7T magnetic field.

Main Results:

• The new cell effectively mimics the electric potential distribution of ideal hyperbolic electrodes in a cylindrical trap.
• Demonstrated superior ion motion harmonization at larger cyclotron radii compared to existing cylindrical cells.
• Achieved a mass resolving power exceeding twenty million for reserpine and over one million for BSA molecular ions.

Conclusions:

• The developed FTICR cell, utilizing space-averaging principles, offers significant improvements over conventional designs.
• The cell's design enables high mass resolving power and efficient ion motion control, crucial for advanced mass spectrometry.
• This innovation represents a breakthrough in Penning trap technology for high-performance analytical applications.