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Title: Neutron production in deuterium gas-puff implosions on the refurbished Z accelerator.

Abstract

It has been experimentally demonstrated that deuterium gas-puff implosions at >15 MA are powerful sources of fusion neutrons. Analysis of these experiments indicates that a substantial fraction of the obtained DD fusion neutron yields {approx} 3 x 10{sup 13}, about 50%, might have been of thermonuclear origin. The goal of our study is to estimate the scaling of the thermonuclear neutron yield from deuterium gas-puff implosions with higher load currents available after the refurbishment of Z, both in the short-pulse ({approx}100 ns) and in the long-pulse ({approx}300 ns) implosion regimes. We report extensive ID and 2D radiation-hydrodynamic simulations of such implosions. The mechanisms of ion heating to the fusion temperatures of 7-10 keV are essentially the same as used in structured gas-puff loads to generate high Ar K-shell yields: shock thermalization of the implosion kinetic energy and subsequent adiabatic heating of the on-axis plasma. We investigate the role of high-atomic-number gas that can be added to the outer shell to improve both energy coupling of the imploded mass to the generator and energy transfer to the inner part of the load, due to radiative losses that make the outer shell thin. We analyze the effect of imposed axial magnetic fieldmore » {approx}30-100 kG, which can contribute both to stabilization of the implosion and to Joule heating of the imploded plasma. Our estimates indicate that thermonuclear DD neutron yields approaching 10 are within the reach on refurbished Z.« less

Authors:
; ;  [1];  [2];  [1];  [1];  [1]
  1. Naval Research Laboratory, Washington DC
  2. Berkeley Research Associates, Beltsville, MD
Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
USDOE
OSTI Identifier:
1020378
Report Number(s):
SAND2010-3997C
TRN: US1103750
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the 37th IEEE International Conference on Plasma Science held June 21-24, 2010 in Norfolk, VA.
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; DEUTERIUM; ENERGY TRANSFER; HEATING; IMPLOSIONS; JOULE HEATING; K SHELL; KINETIC ENERGY; MAGNETIC FIELDS; NEUTRONS; ORIGIN; PLASMA; PRODUCTION; STABILIZATION; THERMALIZATION

Citation Formats

Flicker, Dawn G, Coverdale, Christine Anne, Velikovich, Aleksandr Lazarevich, Clark, R W, Chong, Y K, Davis, J, and Giuliani, J L. Neutron production in deuterium gas-puff implosions on the refurbished Z accelerator.. United States: N. p., 2010. Web.
Flicker, Dawn G, Coverdale, Christine Anne, Velikovich, Aleksandr Lazarevich, Clark, R W, Chong, Y K, Davis, J, & Giuliani, J L. Neutron production in deuterium gas-puff implosions on the refurbished Z accelerator.. United States.
Flicker, Dawn G, Coverdale, Christine Anne, Velikovich, Aleksandr Lazarevich, Clark, R W, Chong, Y K, Davis, J, and Giuliani, J L. Tue . "Neutron production in deuterium gas-puff implosions on the refurbished Z accelerator.". United States.
@article{osti_1020378,
title = {Neutron production in deuterium gas-puff implosions on the refurbished Z accelerator.},
author = {Flicker, Dawn G and Coverdale, Christine Anne and Velikovich, Aleksandr Lazarevich and Clark, R W and Chong, Y K and Davis, J and Giuliani, J L},
abstractNote = {It has been experimentally demonstrated that deuterium gas-puff implosions at >15 MA are powerful sources of fusion neutrons. Analysis of these experiments indicates that a substantial fraction of the obtained DD fusion neutron yields {approx} 3 x 10{sup 13}, about 50%, might have been of thermonuclear origin. The goal of our study is to estimate the scaling of the thermonuclear neutron yield from deuterium gas-puff implosions with higher load currents available after the refurbishment of Z, both in the short-pulse ({approx}100 ns) and in the long-pulse ({approx}300 ns) implosion regimes. We report extensive ID and 2D radiation-hydrodynamic simulations of such implosions. The mechanisms of ion heating to the fusion temperatures of 7-10 keV are essentially the same as used in structured gas-puff loads to generate high Ar K-shell yields: shock thermalization of the implosion kinetic energy and subsequent adiabatic heating of the on-axis plasma. We investigate the role of high-atomic-number gas that can be added to the outer shell to improve both energy coupling of the imploded mass to the generator and energy transfer to the inner part of the load, due to radiative losses that make the outer shell thin. We analyze the effect of imposed axial magnetic field {approx}30-100 kG, which can contribute both to stabilization of the implosion and to Joule heating of the imploded plasma. Our estimates indicate that thermonuclear DD neutron yields approaching 10 are within the reach on refurbished Z.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {6}
}

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