21st International Conference on the Physics of Highly Charged Ions

A special issue of Atoms (ISSN 2218-2004).

Deadline for manuscript submissions: 31 December 2024 | Viewed by 1315

Special Issue Editors


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Guest Editor
1. Advanced Research Center for Nanolithography, Amsterdam, The Netherlands
2. Department of Physics and Astronomy, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
Interests: atomic physics; highly charged ions; quantum chaos; atomic processes in plasmas; radiation–hydrodynamic modeling

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Guest Editor
Groningen and Advanced Research Center for Nanolithography, University of Groningen, Amsterdam, The Netherlands
Interests: physics and astronomy chemistry materials science earth and planetary sciences engineering biochemistry; genetics and molecular biology mathematics chemical engineering multidisciplinary

Special Issue Information

Dear Colleagues,

The study of highly charged ions (HCIs) is a cornerstone of contemporary atomic and plasma physics research. Advances in this field have had (and will continue to have) far-reaching consequences for numerous fundamental and applied scientific disciplines.  Their unique structures serve as a testbed for today’s most advanced bound-state quantum electrodynamics (QED) calculations, and may be exploited in the future as frequency standards as atomic clocks as well as in searches for variations in fundamental constants and physics beyond the standard model. Moreover, HCIs are encountered in practically every high-temperature plasma environment from stellar objects and black-hole accretion disks to terrestrial plasmas developed for fusion and semiconductor manufacturing purposes. The diagnosis of these extreme environments requires extensive knowledge of the structures, collisional and radiative properties of HCIs, information which is largely lacking.

The generation of fundamental atomic data, both structural and collisional, is a core component of HCI physics involving the close interplay of theory and experiment. On the theoretical front, HCI research extends from the development of many-body effects in QED calculations to the accurate modelling of energy transfer in strongly radiating, HCI-dominant plasmas. The development of experimental facilities and advanced instrumentation for HCI production (ion sources, accelerators, free-electron lasers) as well as the development of methods to interrogate the structures and dynamics of HCIs in complex environments (e.g. clusters, surfaces) are key for future developments in HCI physics.

The present Special Issue documents the proceedings of the 21st HCI conference, the leading conference for researchers working in the field of HCI physics. This biennial conference is held in Egmond aan Zee on 2nd – 6th September 2024. It is the second time that the HCI conference will be held in the Netherlands, with the first instance being in 1986 in Groningen. The topics presented in this Special Issue cover research on fundamental HCI structures via interactions with photons, electrons, ions, atoms, molecules and solids to applications in astrophysical, fusion and industrial plasma.

Dr. John Sheil
Prof. Dr. Ronnie Hoekstra
Guest Editors

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Keywords

  • highly charged ions
  • atomic structure and spectroscopy
  • collision dynamics involving ions

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Published Papers (1 paper)

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Research

5 pages, 196 KiB  
Article
Measurement and Flexible Atomic Code (FAC) Computation of Extreme Ultraviolet (EUV) Spectra of Eu
by Joel H. T. Clementson, Peter Beiersdorfer, Gregory V. Brown, Natalie Hell and Elmar Träbert
Atoms 2024, 12(10), 48; https://doi.org/10.3390/atoms12100048 - 27 Sep 2024
Viewed by 722
Abstract
A group of EUV lines of H- and He-like ions of C provides excellent wavelength calibrations for a position-sensitive multichannel detector at a high-resolution spectrograph. We have exploited this setting for a series of spectra of highly charged Eu ions recorded at the [...] Read more.
A group of EUV lines of H- and He-like ions of C provides excellent wavelength calibrations for a position-sensitive multichannel detector at a high-resolution spectrograph. We have exploited this setting for a series of spectra of highly charged Eu ions recorded at the Livermore SuperEBIT electron beam ion trap. A variation in the electron beam energy results in spectra with correspondingly staggered highest Eu ion charge states ranging from Na- through to Ni-like Eu ions. A number of spectral features can be identified from the literature, but the majority of line identifications need guidance from computations of simulated spectra on the basis of collisional-radiative models. For ions with more than two electrons in the valence shell, the typical computational results are of a markedly lower accuracy. We have applied the Flexible Atomic Code (FAC), which is capable of handling all our measured ions with reasonable accuracy. We look into the systematics of the deviation of the computed transition energies from the measured ones as a function of the electron number. Full article
(This article belongs to the Special Issue 21st International Conference on the Physics of Highly Charged Ions)
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