Testing of QED: Natural broadening of spectral lines

The difficulties associated with surface divergences, of a consistent QED theory in describing of the natural broadening (NB) of atomic systems are studied. This problem seems to be clearly and sensetively (in experimental meaning) appeared in the case of heavy muhicharged ions. To overcome this difficulty we have used a quantity of elementary interaction length, an analogy of the length of coherence. We have obtained that the NB contains a linear 1-divergence besides of a logarifmic one arrising in standard QED calculations. A Z-dependence has allowed us to suggest earring out the experimental testing of QED in the highly ionised atoms with the aid of more accurate technologies

QED phenomena in highly ionised atoms

In the case of multiply-charged ions when energy levels with the same values of the total angular momentum J, its projection Jz and parity P may overlap, the SD difficulties are shown to manifest themselves in QED calculations of the respective spectral line profiles (SLPs). In this case we have used the regaularisation method of cut momentum L. A logarifrnic L-dependence seems to be contained in the obtained formaulas of NB and SLP. On the example of hydrogen-like uranium U+91 the SLPs have been calculated which spectra are deformed. It have been studied a dependence of SLPs from cut off momentum L, state [i> and mutual distance ΔE ji

Testing of QED: Natural broadening of spectral lines

The difficulties associated with surface divergences, of a consistent QED theory in describing of the natural broadening (NB) of atomic systems are studied. This problem seems to be clearly and sensetively (in experimental meaning) appeared in the case of heavy muhicharged ions. To overcome this difficulty we have used a quantity of elementary interaction length, an analogy of the length of coherence. We have obtained that the NB contains a linear 1-divergence besides of a logarifmic one arrising in standard QED calculations. A Z-dependence has allowed us to suggest earring out the experimental testing of QED in the highly ionised atoms with the aid of more accurate technologies

Testing of QED: Natural broadening of spectral lines

The difficulties associated with surface divergences, of a consistent QED theory in describing of the natural broadening (NB) of atomic systems are studied. This problem seems to be clearly and sensetively (in experimental meaning) appeared in the case of heavy muhicharged ions. To overcome this difficulty we have used a quantity of elementary interaction length, an analogy of the length of coherence. We have obtained that the NB contains a linear 1-divergence besides of a logarifmic one arrising in standard QED calculations. A Z-dependence has allowed us to suggest earring out the experimental testing of QED in the highly ionised atoms with the aid of more accurate technologies

QED phenomena in highly ionised atoms

In the case of multiply-charged ions when energy levels with the same values of the total angular momentum J, its projection Jz and parity P may overlap, the SD difficulties are shown to manifest themselves in QED calculations of the respective spectral line profiles (SLPs). In this case we have used the regaularisation method of cut momentum L. A logarifrnic L-dependence seems to be contained in the obtained formaulas of NB and SLP. On the example of hydrogen-like uranium U+91 the SLPs have been calculated which spectra are deformed. It have been studied a dependence of SLPs from cut off momentum L, state [i> and mutual distance ΔE ji

QED phenomena in highly ionised atoms

In the case of multiply-charged ions when energy levels with the same values of the total angular momentum J, its projection Jz and parity P may overlap, the SD difficulties are shown to manifest themselves in QED calculations of the respective spectral line profiles (SLPs). In this case we have used the regaularisation method of cut momentum L. A logarifrnic L-dependence seems to be contained in the obtained formaulas of NB and SLP. On the example of hydrogen-like uranium U+91 the SLPs have been calculated which spectra are deformed. It have been studied a dependence of SLPs from cut off momentum L, state [i> and mutual distance ΔE ji

Testing of QED: Natural broadening of spectral lines

The difficulties associated with surface divergences, of a consistent QED theory in describing of the natural broadening (NB) of atomic systems are studied. This problem seems to be clearly and sensetively (in experimental meaning) appeared in the case of heavy muhicharged ions. To overcome this difficulty we have used a quantity of elementary interaction length, an analogy of the length of coherence. We have obtained that the NB contains a linear 1-divergence besides of a logarifmic one arrising in standard QED calculations. A Z-dependence has allowed us to suggest earring out the experimental testing of QED in the highly ionised atoms with the aid of more accurate technologies

Extension of the code suite FLY to a multi-cell postprocessor for hydrodynamic plasma simulation codes

The extension of the atomic kinetics code suite FLY to a multi-cell postprocessor for hydrodynamic plasma simulation codes, called SWARM is presented. First, the collisional radiative model on which FLY is based is reviewed as far as it corresponds to the model in SWARM, then more attention is paid to the differences. Multiple cell simulations require a more complicated algorithm to solve the radiative transfer problem, taking into account geometry and point of observation. The feedback of the radiation on the atomic state populations is taken into account in a more sophisticated escape factor model. Finally, the limitations of the model are discussed. © 2001 Elsevier Science Ltd. All rights reserved