Spectroscopy on highly charged ions — recent advances using tokamaks, laser-produced plasmas and straight ion beams

Träbert, E.

doi:10.1016/0168-583x(95)00022-4

Cited by 14 publications

(3 citation statements)

References 74 publications

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“…The lifetimes associated with these electric-dipole (E1) forbidden transitions are much longer than those for levels with E1-allowed transitions, and can be as long as many milliseconds. The traditional method for lifetime measurements, beam-foil, cannot be employed due to the extremely long flight paths which would be needed [3], while the technique of slow ion beams [4] needs to be developed further before it can be used for the millisecond time range. Heavy-ion storage rings, a tool recently utilized for lifetime measurements in the millisecond range [5], may be severely limited by the available ion beam currents for highly charged species and by geometrical constraints which cause a low detection efficiency.…”

Section: Introductionmentioning

confidence: 99%

Lifetime measurements in the ground configuration of and using an electron beam ion trap

Serpa

Gillaspy

Trabert

1998

J. Phys. B: At. Mol. Opt. Phys.

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Section: Introductionmentioning

confidence: 99%

Lifetime measurements in the ground configuration of and using an electron beam ion trap

Serpa

Gillaspy

Trabert

1998

J. Phys. B: At. Mol. Opt. Phys.

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“…[5][6][7][8][9] Plenty of emission lines from highly charged Ar XV ions have been observed and applied in astrophysical, tokamak and other laboratory plasmas. [7,[10][11][12][13][14][15][16][17][18] For example, the line intensity ratios and line widths of Ar XV ion were used to diagnose plasma level population and electron density. [19] The line widths of Ar XV ions are also required in spectrum simulations.…”

Section: Introductionmentioning

confidence: 99%

Theoretical study of electron-impact broadening for highly charged Ar XV ion lines

Gao

Zhu

et al. 2023

Chinese Phys. B

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Spectral line widths produced by collisions between charged particles and emitters are of special interest for precise plasma spectroscopy. The highly charged Ar XV ion is demonstrated to have strong intrashell electron interactions, which manifest as an atomic system with many resonance structures, due to the quasi-degeneracy of orbital energies. In this paper, we use the relativistic R-matrix method to investigate the electron-impact broadening of highly charged Ar XV ion spectral lines under the impact approximation. It is found that the results with considering resonance structures are significantly different from those of distorted wave approach. Furthermore, we propose a new empirical formula with a correction term to take into account the effect of resonances for electron-impact widths over a relatively wide range of plasma conditions. The corresponding fitting parameters of new empirical formula for all the calculated forty-seven transitions are also given with an estimated accuracy within 1%, which should be convenient for practical applications.

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“…Lifetime measurements on the magnetic dipole (M1) decay of the 1s2s 3 S 1 level in He-like ions (by various techniques) now reach from neutral He atoms to Xe 52+ ions (with almost all data for Z > 16 obtained by beam-foil spectroscopy, see ref. 12 and references cited therein); the intercombination transition rate (2s 2 1 S 0 -2s2p 3 P o 1 ) in Be-like ions has been measured from B + to Xe 50+ (see ref. 13); the resonance line in Na-like ions and intercombination transition rates in Mg-and Al-like ions have been measured up to Au (Z = 79) [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Precise atomic lifetime measurements with stored ion beams and ion traps

Träbert¹

2002

Can. J. Phys.

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For many years, atomic lifetime measurements on multiply-charged ions have been done almost exclusively by beam-foil spectroscopy. For low ion charges, however, spin-changing "intercombination" transitions have a rate that renders them too slow for traditional fast-beam techniques. Here ion traps and fast-ion beams have been combined in the concept of heavy-ion storage rings. These devices have permitted not only an extension of intercombination lifetime measurements down to singly charged ions, but they also facilitated similar measurements on electric-dipole forbidden transitions. The electron-beam ion trap (EBIT) complements the storage-ring work for work on highly charged ions. Achievements, technical issues, and prospects are outlined. PACS Nos.: 32.70Cs, 32.30Jc, 34.50Fa

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Spectroscopy on highly charged ions — recent advances using tokamaks, laser-produced plasmas and straight ion beams

Cited by 14 publications

References 74 publications

Lifetime measurements in the ground configuration of and using an electron beam ion trap

Lifetime measurements in the ground configuration of and using an electron beam ion trap

Theoretical study of electron-impact broadening for highly charged Ar XV ion lines

Precise atomic lifetime measurements with stored ion beams and ion traps

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