Numeric codes passports
RRC "Kurchatov Institute" http://www.kiae.ru
Plasma Theory Department
Radiation Theory Laboratory
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Description of available numeric codes (including developed in collaboration)
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1. Name of code: nl-KINRYD (n,l collisional-radiative kinetics of Rydberg atomic states)
Responsible person: M.G. Levashova mailto: mariya@nfi.kiae.ru
Description of code (including approximations & accuracy) & applications:
Calculation of two-dimensional (i.e., in principal and orbital quantum numbers, ''n'' and ''l'' ) collisional-radiative steady-state kinetics of Rydberg atomic states and of line intensities. The Coulomb collisions of atomic electron with plasma electrons and ions are treated classically with the Landau collision operator. Radiative cascade is treated either with quantum cascade matrix, generalized to the case of the presence of collisions (via an iterative procedure for an integro-differential equation) or in its quasi-classical version which treats ''k''-step radiative transitions (for ''k''>''k*'') classically. The code is applicable to a wide range of fusion and astrophysical plasmas and is especially important for selective sources of external population.
References & recent applications:
[1] M.B. Kadomtsev, M.G. Levashova and V.S. Lisitsa. Universal two-dimensional kinetics of the populations of Rydberg atoms in plasmas, JETP Letters, 2007, Vol. 85, No. 1O, pp. 493-497
http://springerlink.com/content/3772037313t20574
http://dx.doi.org/10.1134/S0021364007100050
doi:10.1134/S0021364007100050
[2] M.B. Kadomtsev, M.G. Levashova and V.S. Lisitsa. Semiclassical theory of the radiative-collisional cascade in a Rydberg atom, JETP, 2008, Vol. 106, No. 4, pp. 635-649
http://springerlink.com/content/4r305u0tj3522w1w
http://dx.doi.org/10.1134/S106377610804002X
doi:10.1134/S106377610804002X
[3] M.G. Levashova. The effect of collisions on the radiative cascade in Rydberg atoms 2008 J. Phys. B: At. Mol. Opt. Phys. 41 035701 (7pp) http://www.iop.org/EJ/abstract/0953-4075/41/3/035701 http://dx.doi.org/10.1088/0953-4075/41/3/035701
doi:10.1088/0953-4075/41/3/035701
[...] Estimation of contribution of heavy atom impurities to the charge exchange recombination spectroscopy (CXRS) in tokamak plasmas (this includes the ITER diagnostics tasks, the work is in progress)
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Name of code: ESMEABRR = (Electron + Static Many-Electron Atom) (Bremsstrahlung + Radiative Recombination)
Responsible person: A.B. Kukushkin kuka@nfi.kiae.ru, kukushkin.alexander@gmail.com
Description of code (including approximations & accuracy) & applications:
Fast routine module ("simulator") is based on semi-analytic description of Bremsstrahlung and radiative recombination cross sections for collisions of quasiclassical electrons (i.e. those of mild, non-relativistic energy) with a static many electron atoms and ions [3] (from the case of neutral atom [1,2] up to fully stripped). The approach was tested against the database of quantum mechanical numerical modeling by R.H. Pratt et al. (see references in [4], including comparison with experiments for neutral atom ) and has shown ~30% agreement for all frequencies and any stripping of the atom in the range of normalized electron energies 0.1 ~< eps ~< 1 (where eps = E a_TF/Ze^2 = 32.6 E(keV)/Z^4/3, E is electron energy, Z is nucleus electric charge, a_TF is Thomas-Fermi raduis). The code is applicable to a wide range of fusion plasmas, including hot plasmas with multiply charged ions for inertial confinement fusion.
References & recent applications:
[1] Kogan V.I., Kukushkin A.B., Electron Bremsstrahlung in an atomic potential: classicality of spectrum, scaling laws. JETP Lett., 37 (1983) 322.
[2] Kogan V.I., Kukushkin A.B., Radiation emission by quasiclassical electrons in an atomic potential. Sov. Phys. JETP, 60 (1984) 665.
[3] Ivanov V.V., Kukushkin A.B., Kogan V.I., An analytic description of plasma electrons Bremsstrahlung on a many-electron ion. Sov. J. Plasma Phys., 15 (1989) 892.
[4] Kogan V.I., Kukushkin A.B., Lisitsa V.S., Kramers Electrodynamics and Electron-Atomic Radiative-Collisional Processes. Phys. Reports, 1992, v.213, # 1-2, pp.1-116;
http://dx.doi.org/10.1016/0370-1573(92)90161-R
doi:10.1016/0370-1573(92)90161-R
[5] Lisitsa V.S., Atoms in Plasmas. Springer, 1994.
[...] Estimation of contribution of radiation in continuous spectrum to spectral background in divertor and edge tokamak plasmas (this includes the ITER diagnostics tasks, the work is in progress)
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