skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: One-Dimensional Lagrangian Code for Plasma Hydrodynamic Analysis of a Fusion Pellet Driven by Ion Beams.

Abstract

Version 00 The MEDUSA-IB code performs implosion and thermonuclear burn calculations of an ion beam driven ICF target, based on one-dimensional plasma hydrodynamics and transport theory. It can calculate the following values in spherical geometry through the progress of implosion and fuel burnup of a multi-layered target. (1) Hydrodynamic velocities, density, ion, electron and radiation temperature, radiation energy density, Rs and burn rate of target as a function of coordinates and time, (2) Fusion gain as a function of time, (3) Ionization degree, (4) Temperature dependent ion beam energy deposition, (5) Radiation, -particle and neutron spectra as a function of time.

Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1278649
Report Number(s):
MEDUSA-IB; 004562MLTPL00
RSICC ID: C00505HM200
DOE Contract Number:
AC05-00OR22725
Resource Type:
Software
Software Revision:
00
Software Package Number:
004562
Software CPU:
MLTPL
Source Code Available:
Yes
Other Software Info:
Owner Installation: UNIV OF TOKYO Contributors: University of Tokyo, Tokyo, Japan. MEDUSA-IB code is based on the one-dimensional Lagrangian hydrodynamic code MEDUSA for implosion and thermonuclear burn calculations. Collision probability method is used to solve neutron transport. The subroutines for this process has been taken from the MEDUSA-PIJ (CCC-349) code. The variable Eddington method is adopted to solve the multigroup radiation transport. The particle tracking method is used to solve both ion beam and -particle transport. These transport processes can be considered only in spherical geometry. Implosion and thermonuclear burn calculations are carried out by performing these processes with controlled time steps. KEYWORDS: CTR; HYDRONAMICS; BURNUP
Country of Publication:
United States

Citation Formats

. One-Dimensional Lagrangian Code for Plasma Hydrodynamic Analysis of a Fusion Pellet Driven by Ion Beams.. Computer software. Vers. 00. USDOE. 1 Dec. 1986. Web.
. (1986, December 1). One-Dimensional Lagrangian Code for Plasma Hydrodynamic Analysis of a Fusion Pellet Driven by Ion Beams. (Version 00) [Computer software].
. One-Dimensional Lagrangian Code for Plasma Hydrodynamic Analysis of a Fusion Pellet Driven by Ion Beams.. Computer software. Version 00. December 1, 1986.
@misc{osti_1278649,
title = {One-Dimensional Lagrangian Code for Plasma Hydrodynamic Analysis of a Fusion Pellet Driven by Ion Beams., Version 00},
author = {},
abstractNote = {Version 00 The MEDUSA-IB code performs implosion and thermonuclear burn calculations of an ion beam driven ICF target, based on one-dimensional plasma hydrodynamics and transport theory. It can calculate the following values in spherical geometry through the progress of implosion and fuel burnup of a multi-layered target. (1) Hydrodynamic velocities, density, ion, electron and radiation temperature, radiation energy density, Rs and burn rate of target as a function of coordinates and time, (2) Fusion gain as a function of time, (3) Ionization degree, (4) Temperature dependent ion beam energy deposition, (5) Radiation, -particle and neutron spectra as a function of time.},
doi = {},
year = 1986,
month = ,
note =
}

Software:
To order this software, request consultation services, or receive further information, please fill out the following request.

Save / Share:
  • In an effort to increase spatial resolution without adding additional meshes, an adaptive mesh was incorporated into a two-dimensional Lagrangian hydrodynamics code along with two-dimensional flux corrected (FCT) remapper. The adaptive mesh automatically generates a mesh based on smoothness and orthogonality, and at the same time also tracks physical conditions of interest by focusing mesh points in regions that exhibit those conditions; this is done by defining a weighting function associated with the physical conditions to be tracked. The FCT remapper calculates the net transportive fluxes based on a weighted average of two fluxes computed by a low-order scheme andmore » a high-order scheme. This averaging procedure produces solutions which are conservative and nondiffusive, and maintains positivity. 10 refs., 12 figs.« less
  • A new one-dimensional hydrodynamic algorithm, specifically developed for Inertial Confinement Fusion (ICF) applications, is presented. The scheme uses a fully conservative Lagrangian formulation in planar, cylindrical, and spherically symmetric geometries, and supports arbitrary equations of state with separate ion and electron components. Fluid equations are discretized on a staggered grid and stabilized by means of an artificial viscosity formulation. The space discretized equations are advanced in time using an implicit algorithm. The method includes several numerical parameters that can be adjusted locally. In regions with low Courant–Friedrichs–Lewy (CFL) number, where stability is not an issue, they can be adjusted tomore » optimize the accuracy. In typical problems, the truncation error can be reduced by a factor between 2 to 10 in comparison with conventional explicit algorithms. On the other hand, in regions with high CFL numbers, the parameters can be set to guarantee unconditional stability. The method can be integrated into complex ICF codes. This is demonstrated through several examples covering a wide range of situations: from thermonuclear ignition physics, where alpha particles are managed as an additional species, to low intensity laser–matter interaction, where liquid–vapor phase transitions occur.« less
  • The illumination of a spherical fusion pellet displaced from the foci of a refractive laser-fusion system is investigated based on the vector-analysis method. This method is more accurate than the phase-shift approximation for the spherical wave functions in the displaced frame and reduces the computation time and capacity more greatly than does the method of translational addition theorems for spherical wave functions. Two transformation matrices are derived through analyzing the EM-field vector in three different frames of coordinates. The two matrices are used to calculate the efficiency, kurtosis, and skewness of illumination distribution at the pellet surface. The numerical resultsmore » of the illumination efficiency are in a good agreement with the results of othe workers. In addition, the pellet displacement corresponding to maximal illumination flatness near the focus is determined quantitatively. The illumination asymmetry that is due to the perpendicular pellet displacement is aggravated by using larger lens aperture or short light wavelength and/or by displacing the pellet on the positive axial side of the focus.« less
  • In this paper the behavior of an arc-driven railgun for hydrogen pellet injection is examined. Launch of saboted and unsaboted pellets is considered, and the arc mass influence on the behavior of the accelerating system is analyzed in both cases. The characteristic quantities of the hydrogen plasma armature are evaluated by means of an a dimensional model. The efficiency of the system is investigated as to whether or not the recovery of the energy remaining in the railgun at the time of launch is performed.
  • The RELAP5/MOD2 code is a fast-running, user-convenient reactor transient analysis code that has been used to simulate a wide spectrum of thermal-hydraulic transients in both nuclear and nonnuclear systems involving steam-water-noncondensible fluid mixtures. For most of the past decade, however, the Transient Reactor Analysis Code has been the primary code used to simulate transients in which multidimensional hydraulic behavior was anticipated. With the inclusion of the cross-flow junction into RELAP5, however, it has become possible to use RELAP5 to simulate certain components having multidimensional hydraulics, even though RELAP5 is having a one-dimensional code. A novel application of the RELAP5 codemore » to a situation with known three-dimensional hydraulic behavior is presented. The RELAP5 code is currently being used to support restart analyses at the U.S. Department of Energy Savannah River Site (SRS). The computer code and input model were benchmarked against several sets of SRS data to demonstrate their applicability for thermal-hydraulic analysis of SRS production reactors. The benchmarking process provide a significant measure of confidence in the capability of RELAP5 to determine system response in situations where multidimensional hydraulic behavior occurs.« less

To initiate an order for this software, request consultation services, or receive further information, fill out the request form below. You may also reach us by email at: .

OSTI staff will begin to process an order for scientific and technical software once the payment and signed site license agreement are received. If the forms are not in order, OSTI will contact you. No further action will be taken until all required information and/or payment is received. Orders are usually processed within three to five business days.

Software Request

(required)
(required)
(required)
(required)
(required)
(required)
(required)
(required)