A multi-plate velocity-map imaging design for high-resolution photoelectron spectroscopy
| Autor: | Steven J. Kregel, Jia Zhou, Etienne Garand, Glen K. Thurston |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
business.industry
Chemistry Resolution (electron density) General Physics and Astronomy 02 engineering and technology Cryogenics 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Spectral line 0104 chemical sciences Optics X-ray photoelectron spectroscopy Ion trap Physical and Theoretical Chemistry Atomic physics 0210 nano-technology business Focus (optics) Energy (signal processing) Voltage |
| Zdroj: | The Journal of chemical physics. 147(9) |
| ISSN: | 1089-7690 |
| Popis: | A velocity map imaging (VMI) setup consisting of multiple electrodes with three adjustable voltage parameters, designed for slow electron velocity map imaging applications, is presented. The motivations for this design are discussed in terms of parameters that influence the VMI resolution and functionality. Particularly, this VMI has two tunable potentials used to adjust for optimal focus, yielding good VMI focus across a relatively large energy range. It also allows for larger interaction volumes without significant sacrifice to the resolution via a smaller electric gradient at the interaction region. All the electrodes in this VMI have the same dimensions for practicality and flexibility, allowing for relatively easy modifications to suit different experimental needs. We have coupled this VMI to a cryogenic ion trap mass spectrometer that has a flexible source design. The performance is demonstrated with the photoelectron spectra of S− and CS2−. The latter has a long vibrational progression in the groun... |
| Databáze: | OpenAIRE |
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