The DEIRA code has been developed at the Institute for Theoretical and Experimental Physics (ITEP, Moscow) in the period of 1988-2006 as part of an effort to explore the feasibility of the controlled thermonuclear fusion, based on the principle of inertial confinement (ICF) and using the beams of heavy ions as a driver. For a number of years, the 1D-3T Lagrangian DEIRA code served as a principal tool for investigating ICF targets, driven by heavy ion beams.
The physics model, implemented in the DEIRA code, was gradually built up and perfected in the years 1980-2006. It is based on the equations of 1D hydrodynamics, where the flow geometry can be either plane-parallel, or cylindrical, or spherical. It is assumed that a simulated target can be irradiated by ion beams only strictly symmetrically within the prescribed geometry, and that the ions propagate along the target radii. An arbitrary mixture of the deuterium, tritium, helium-3, hydrogen, and boron-11 isotopes can be used as a thermonuclear fuel. In particular, the implemented model includes
For the equation of state (EOS), several simple analytic models have been preprogrammed. To simulate realistic materials, the main tabular option of EOS can be used: the required tables of the 2T EOS are generated by a separate code package TABIN3 (supplied together with the DEIRA code), where an average-atom model from [M.M.Basko, Sov. High Temper. (Teplofiz. Vysok. Temper.), 23 (1985) 388-396; preprint ITEP-57 (1982)] is implemented. For all the transport and relaxation coefficients, thermonuclear burn rates, viscosity coefficients, etc., analytic models are available, which describe with a reasonable accuracy the properties of dense and/or hot magnetized plasmas. A comprehensive description of the DEIRA physics model and of the numerical scheme is given in the report that can be downloaded from here .
Originally, the DEIRA code was written in the FORTRAN-77 language and aimed at being run on relatively low-power computers (like the BESM-6 produced in the USSR) with a minuscule RAM of about 200 kbytes; hence its rather primitive architecture. Any work on the DEIRA code has been stopped in 2006; its latest FORTRAN-77 version from that year can be downloaded as the deira4.zip file. The work on this project has been resumed in 2018 under a new name DELIRA on the more powerful platform of FORTRAN-90, with the intention to preserve the full legacy of the DEIRA model in the new multi-purpose 1D Lagrangian DELIRA code .
Copyright © 1991 - 2007 Mikhail Basko
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Originally composed: 2007.02.04
Last update: 2020.02.19