Developing a device for selective ion transmission by kinetic energy

Project Abstract

Miniature mass spectrometry has great applicability in a wide range of fields such as forensics, space exploration, and health care diagnostics. It can allow for rapid, direct analysis of samples on-site, giving immediate results rather than waiting for traditional laboratory analysis. However, miniaturization faces many challenges from size and weight to power limitations. These devices generally use an ion trap or quadrupole mass analyzer to address these constraints. However, electronic complexity still remains with high frequency alternating current power supplies. We present an alternative design using direct current. This could allow for direct current power sources such as batteries without the need for a converter, minimizing power loss. This design uses direct current power supplies and switches to create a region that sets kinetic energy as a function of mass-to-charge. This region is followed by an electrostatic lens. By selecting for a specific kinetic energy, the lens selects for a specific mass-to-charge ratio, allowing mass analysis. This work presents SIMION simulations investigating the practicality of such an approach for miniature mass spectrometry, demonstrating electrode design and operating potentials. Mass resolution is dependent on both uniformity of the kinetic energy distribution on the mass range under analysis as well as the kinetic energy resolution of the lens. We also investigate these effects to better understand the theoretical resolution of this design.

Conference

Conference Name: American Chemical Society National Meeting & Exposition – Spring 2026

Dates: March 22–26, 2026

Sponsoring Body: The American Chemical Society (ACS)

Conference Website: ACS Spring - American Chemical Society

Funding Type

Travel Grant

Academic College

Jesse D. Jones College of Science, Engineering and Technology

Area/Major/Minor

Chemistry

Degree

Master's Degree

Classification

Graduate

Name

Caleb Morris, PhD

Academic College

Jesse D. Jones College of Science, Engineering and Technology

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