Abstract
Velocity map imaging (VMI) is a powerful technique to deduce the kinetic energy of ions or electrons that are produced from a large volume in space with good resolution. The size of the acceptance volume is determined by the spherical aberrations of the ion optical system. Here we present an analytical derivation for velocity map imaging with no spherical aberrations. We will discuss a particular example for the implementation of the technique that allows using the reaction microscope recently installed in the cryogenic storage ring (CSR) in a VMI mode. SIMION simulations confirm that a beam of electrons produced almost over the entire volume of the source region, with a width of 8 cm, can be focused to a spot of 0.1 mm on the detector. The use of the same formalism for position imaging, as well as in a mixed mode where position imaging is in one axis and velocity map imaging is in a different axis, is also discussed.
Original language | English |
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Pages (from-to) | 25122-25129 |
Number of pages | 8 |
Journal | Physical Chemistry Chemical Physics |
Volume | 25 |
Issue number | 37 |
DOIs | |
State | Published - 27 Sep 2023 |
Bibliographical note
Publisher Copyright:© 2023 The Royal Society of Chemistry.
Funding
We are grateful to Oded Heber for insightful conversations and for suggesting to use the CSR-ReMi in VMI mode. This work was supported by the Israeli Science Foundation, the Minerva center for making bonds by fragmentation and by COST Action CA18212 (Molecular Dynamics in the GAS phase (MD-GAS)).
Funders | Funder number |
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European Cooperation in Science and Technology | CA18212 |
Israel Science Foundation |