Abstract
The implosion of a family of reactor-size targets for inertial confinement fusion (ICI) is studied analytically and numerically. The targets consist of a DT shell, filled with DT vapour, and are imploded by a multi-step pressure pulse, designed in such a way that the final hot spot is formed mainly by the initially gaseous fuel. The process of formation of the hot-spot is described by means of a relatively simple model, and scaling laws for the magnitudes that characterize the state of the initially gaseous fuel at the time previous to ignition are derived. The results of the model are compared with 1-D fluid simulations, and a good agreement is found. A parametric study of the fuel energy gain is then presented; the dependence of the gain and of the convergence ratio on the pulse parameters and on the filling gas density is analyzed; it is also shown that a substantial increase of the gain (for a given target and pulse energy) can be achieved by replacing the last step of the pulse with an exponential ramp.
Citation Formats
Piriz, A R, and Atzeni, S.
Implosion of reactor-size, gas filled spherical shell targets driven by shaped pressure pulses.
Italy: N. p.,
1992.
Web.
Piriz, A R, & Atzeni, S.
Implosion of reactor-size, gas filled spherical shell targets driven by shaped pressure pulses.
Italy.
Piriz, A R, and Atzeni, S.
1992.
"Implosion of reactor-size, gas filled spherical shell targets driven by shaped pressure pulses."
Italy.
@misc{etde_10139001,
title = {Implosion of reactor-size, gas filled spherical shell targets driven by shaped pressure pulses}
author = {Piriz, A R, and Atzeni, S}
abstractNote = {The implosion of a family of reactor-size targets for inertial confinement fusion (ICI) is studied analytically and numerically. The targets consist of a DT shell, filled with DT vapour, and are imploded by a multi-step pressure pulse, designed in such a way that the final hot spot is formed mainly by the initially gaseous fuel. The process of formation of the hot-spot is described by means of a relatively simple model, and scaling laws for the magnitudes that characterize the state of the initially gaseous fuel at the time previous to ignition are derived. The results of the model are compared with 1-D fluid simulations, and a good agreement is found. A parametric study of the fuel energy gain is then presented; the dependence of the gain and of the convergence ratio on the pulse parameters and on the filling gas density is analyzed; it is also shown that a substantial increase of the gain (for a given target and pulse energy) can be achieved by replacing the last step of the pulse with an exponential ramp.}
place = {Italy}
year = {1992}
month = {Dec}
}
title = {Implosion of reactor-size, gas filled spherical shell targets driven by shaped pressure pulses}
author = {Piriz, A R, and Atzeni, S}
abstractNote = {The implosion of a family of reactor-size targets for inertial confinement fusion (ICI) is studied analytically and numerically. The targets consist of a DT shell, filled with DT vapour, and are imploded by a multi-step pressure pulse, designed in such a way that the final hot spot is formed mainly by the initially gaseous fuel. The process of formation of the hot-spot is described by means of a relatively simple model, and scaling laws for the magnitudes that characterize the state of the initially gaseous fuel at the time previous to ignition are derived. The results of the model are compared with 1-D fluid simulations, and a good agreement is found. A parametric study of the fuel energy gain is then presented; the dependence of the gain and of the convergence ratio on the pulse parameters and on the filling gas density is analyzed; it is also shown that a substantial increase of the gain (for a given target and pulse energy) can be achieved by replacing the last step of the pulse with an exponential ramp.}
place = {Italy}
year = {1992}
month = {Dec}
}