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Rayleigh-Taylor instability on high gain target for heavy ion beam fusion

Technical Report:

Abstract

A numerical analysis was carried out on the stability of targets designed to produce fusion energy gains close to 100 when irradiated with an appropriate heavy ion beam. To reach such performances, it was found that a high-Z radiation shield was necessary to screen the DT fuel from the radiation coming from the surrounding hot material. Since high-Z material opacity is only weakly density dependent, the analysis considered targets with lead shields both at solid density and with a density equivalent to that of the contiguous external material. The behaviour of both these kinds of targets was studied by introducing a small spatial non-uniformity on the external surface of the lead shielding. Targets with low-density shields were also tested with a beam intensity perturbation. Since density gradients were very sharp and ablation was practically absent, these implosions were found to be Rayleigh-Taylor unstable. With the use of the full hydrodynamic-radiative model with a non-linear heavy ion energy deposition and mesh correction, it was possible, to follow the evolution in the non-linear regime.
Publication Date:
Dec 31, 1991
Product Type:
Technical Report
Report Number:
ENEA-RT-NUCL-90-36; RT/NUCL-90-36
Reference Number:
SCA: 700411; 360106; 663610; PA: ITAN-91:002074; SN: 92000621811
Resource Relation:
Other Information: PBD: 1991
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 36 MATERIALS SCIENCE; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ION BEAM TARGETS; RAYLEIGH-TAYLOR INSTABILITY; HEAVY ION FUSION REACTIONS; SHIELDING MATERIALS; IMPLOSIONS; GAIN; LEAD; ION BEAM FUSION REACTORS; HYDRODYNAMICS; THERMODYNAMICS; NONLINEAR PROBLEMS; 700411; 360106; 663610; INERTIAL CONFINEMENT DEVICES; RADIATION EFFECTS; NEUTRON PHYSICS
OSTI ID:
10107657
Research Organizations:
ENEA, Frascati (Italy). Dipt. Fusione
Country of Origin:
Italy
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0393-6287; Other: ON: DE92744003; TRN: 91:002074
Availability:
OSTI; NTIS (US Sales Only)
Submitting Site:
ITAN
Size:
20 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Caruso, A, Pais, V A, and Parodi, A. Rayleigh-Taylor instability on high gain target for heavy ion beam fusion. Italy: N. p., 1991. Web.
Caruso, A, Pais, V A, & Parodi, A. Rayleigh-Taylor instability on high gain target for heavy ion beam fusion. Italy.
Caruso, A, Pais, V A, and Parodi, A. 1991. "Rayleigh-Taylor instability on high gain target for heavy ion beam fusion." Italy.
@misc{etde_10107657,
title = {Rayleigh-Taylor instability on high gain target for heavy ion beam fusion}
author = {Caruso, A, Pais, V A, and Parodi, A}
abstractNote = {A numerical analysis was carried out on the stability of targets designed to produce fusion energy gains close to 100 when irradiated with an appropriate heavy ion beam. To reach such performances, it was found that a high-Z radiation shield was necessary to screen the DT fuel from the radiation coming from the surrounding hot material. Since high-Z material opacity is only weakly density dependent, the analysis considered targets with lead shields both at solid density and with a density equivalent to that of the contiguous external material. The behaviour of both these kinds of targets was studied by introducing a small spatial non-uniformity on the external surface of the lead shielding. Targets with low-density shields were also tested with a beam intensity perturbation. Since density gradients were very sharp and ablation was practically absent, these implosions were found to be Rayleigh-Taylor unstable. With the use of the full hydrodynamic-radiative model with a non-linear heavy ion energy deposition and mesh correction, it was possible, to follow the evolution in the non-linear regime.}
place = {Italy}
year = {1991}
month = {Dec}
}