3D MOMENT IMAGING WITH A USB3 OSCILLOSCOPE

Ranathunga, Yasashri Ranganath

Permalink

https://hdl.handle.net/2142/122564 Copy

Description

Title

3D MOMENT IMAGING WITH A USB3 OSCILLOSCOPE

Author(s)

Ranathunga, Yasashri Ranganath

Contributor(s)

• Li, Wen
• Lee, Suk Kyoung
• Olowolafe, Temitayo A.

Issue Date

2023-06-21

Keyword(s)

Mini-symposium: Spectroscopy at Large-scale Facilities

Abstract

In 1997 Eppink and Parker introduced velocity map imaging (VMI) based on the ion imaging technique developed by Chandler and Houston. This method has been as a high-resolution tool to study the detailed dynamics of chemical or physical processes. This approach can measure the momenta and angular distributions of charged particles (ions/electrons) released in these processes and provide detailed information about the potential energy surfaces. Over the years, this technique has been evolving; now it can do direct three-dimensional measurements with multi-hit capability. In this work, we report further improvement to the 3D-VMI setup. With the conventional digitizers employed previously replaced by a low-cost USB oscilloscope, VMI has become more cost-effective, simpler and even portable. The performance of this new VMI apparatus was characterized in a study of laser desorption ionization of 2,5-dihydroxybenzoic acid.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Handle URL

https://hdl.handle.net/2142/122564

DOI

https://doi.org/10.15278/isms.2023.7051

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