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Kinetic simulation of thermonuclear-neutron production by a deuterium pinch
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10.1063/1.3457932
/content/aip/journal/pop/17/7/10.1063/1.3457932
http://aip.metastore.ingenta.com/content/aip/journal/pop/17/7/10.1063/1.3457932
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

A schematic of the D gas puff setup. The -pinch consists of two concentric annuli of D gas within the AK gap. A current source (or corresponding voltage source) is applied between the electrodes.

Image of FIG. 2.
FIG. 2.

Summary of the MACH2 (solid squares and circles) and LSP (open squares and circles) simulated neutron yields for 1D (circles) and 2D (squares). The yields from Anderson et al. (Ref. 1) (highest quoted yield) and Klir et al. (Ref. 2), and shot 1678 of Coverdale et al. (Ref. 3) and Spielman et al. (Ref. 21) are also shown along with the theory curve for constant .

Image of FIG. 3.
FIG. 3.

The DD neutron yield vs time is plotted for 1D and 2D LSP and MACH2 simulation of a 15-MA pinch.

Image of FIG. 4.
FIG. 4.

The time evolution of the deuterium number density in a 15-MA -pinch is plotted at 0, 70, 100, and 112 ns. The top row plots are from LSP; the bottom from MACH2.

Image of FIG. 5.
FIG. 5.

The ion energy distributions within 4-cm radius are plotted from 50 to 115 ns for the 2D 15-MA current PIC simulation.

Image of FIG. 6.
FIG. 6.

The positions of deuterium ions with colors determined by their kinetic energies are plotted from the 15-MA PIC simulation. The ions with 1–100-keV energies are plotted at in (a) and in (b), using the legend at the top left for ion energies. High energy ions with 100–1000-keV energies are plotted at in (c) and in (d) using the legend at the bottom left for ion energies.

Image of FIG. 7.
FIG. 7.

The (a) deuterium-ion energy distribution function including a fit and (b) The distribution function weighted by DD fusion reaction rate are plotted for the 2D 15-MA LSP simulation at 115 ns.

Image of FIG. 8.
FIG. 8.

In (a), the calculated neutron spectra from 0.5- and 7-keV Maxwellian deuterium energy distributions are compared with spectra calculated from 2D 7.5- and 15-MA PIC simulations after 115 ns and the 2D 1.4-MA simulation at 155 ns (Ref. 2). In (b), the normalized neutron spectra from 100–115 ns are plotted from the 15-MA PIC simulation.

Image of FIG. 9.
FIG. 9.

Snapshots of the 1.4-MA, 2-cm deuterium pinch simulations after 0.5, 100, 150, and 165 ns.

Image of FIG. 10.
FIG. 10.

The electric field magnitudes during the pinch phase at 150, 155, 160, and 165 ns are plotted for the 1.4-MA, 2-cm deuterium pinch.

Image of FIG. 11.
FIG. 11.

The (a) deuterium-ion energy distribution function including a fit and (b) the distribution function weighted by the DD fusion reaction rate are plotted for the 2D 1.4-MA LSP simulation at 155 ns.

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/content/aip/journal/pop/17/7/10.1063/1.3457932
2010-07-26
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Kinetic simulation of thermonuclear-neutron production by a 107-A deuterium Z pinch
http://aip.metastore.ingenta.com/content/aip/journal/pop/17/7/10.1063/1.3457932
10.1063/1.3457932
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