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High gain ICF implosion symmetry requirements

Conference:

Abstract

Some aspects of the problem of implosion symmetry in inertial confinement fusion (ICF) are discussed, with particular reference given to heavy ion beam fusion. The physics relative to the ignition of a target imploded by a driving pressure with long wavelength (low-mode number Legendre modes) asymmetries are studied by means of 2-D simulations. A parametric study shows that the tolerable level of non-uniformity is a decreasing function of mode number with the actual values depending on the specific target features (such as convergence ratio and ignition margin). The isobaric-fuel model of gain is then used to show how symmetry constraints (which limit the convergence ratio and the `hohlraum` transfer efficiency) affect the fuel energy gain. By using a model of ion beam energy conversion to X-rays, the gain of a class of indirectly driven targets is also estimated as a function of the relevant beam parameters.
Authors:
Publication Date:
Jun 01, 1991
Product Type:
Conference
Report Number:
ENEA-RT-NUCL-90-44; CONF-9011184-2; RT/NUCL-90-44
Reference Number:
SCA: 700411; 661220; PA: ITAN-91:002103; SN: 92000621839
Resource Relation:
Conference: 1990 international symposium on heavy ion fusion,Monterey, CA (United States),6-9 Nov 1990; Other Information: DN: From International symposium on heavy ion inertial fusion; Monterey, CA, USA (3-6 Dec 1990); PBD: Jun 1991
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ION BEAM TARGETS; IMPLOSIONS; SYMMETRY; GAIN; INERTIAL CONFINEMENT; ION BEAM FUSION REACTORS; ION BEAMS; HEAVY IONS; TWO-DIMENSIONAL CALCULATIONS; 700411; 661220; INERTIAL CONFINEMENT DEVICES; PARTICLE BEAM PRODUCTION AND HANDLING; TARGETS
OSTI ID:
10107640
Research Organizations:
ENEA, Frascati (Italy). Area Nucleare
Country of Origin:
Italy
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1120-5598; Other: ON: DE92744030; TRN: 91:002103
Availability:
OSTI; NTIS (US Sales Only)
Submitting Site:
ITAN
Size:
14 p.
Announcement Date:
Jun 30, 2005

Conference:

Citation Formats

Atzeni, S. High gain ICF implosion symmetry requirements. Italy: N. p., 1991. Web.
Atzeni, S. High gain ICF implosion symmetry requirements. Italy.
Atzeni, S. 1991. "High gain ICF implosion symmetry requirements." Italy.
@misc{etde_10107640,
title = {High gain ICF implosion symmetry requirements}
author = {Atzeni, S}
abstractNote = {Some aspects of the problem of implosion symmetry in inertial confinement fusion (ICF) are discussed, with particular reference given to heavy ion beam fusion. The physics relative to the ignition of a target imploded by a driving pressure with long wavelength (low-mode number Legendre modes) asymmetries are studied by means of 2-D simulations. A parametric study shows that the tolerable level of non-uniformity is a decreasing function of mode number with the actual values depending on the specific target features (such as convergence ratio and ignition margin). The isobaric-fuel model of gain is then used to show how symmetry constraints (which limit the convergence ratio and the `hohlraum` transfer efficiency) affect the fuel energy gain. By using a model of ion beam energy conversion to X-rays, the gain of a class of indirectly driven targets is also estimated as a function of the relevant beam parameters.}
place = {Italy}
year = {1991}
month = {Jun}
}