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Title:
Demonstration of neutron production in a table-top pinch plasma focus device operating at only tens of joules
Authors:
Soto, Leopoldo; Silva, Patricio; Moreno, José; Zambra, Marcelo; Kies, Walter; Mayer, Roberto E.; Clausse, Alejandro; Altamirano, Luis; Pavez, Cristian; Huerta, Luis
Affiliation:
AA(Comisión Chilena de Energía Nuclear, Casilla 188-D, Santiago, Chile ; Center for Research and Applications in Plasma Physics and Pulsed Power, P4, Chile ; ), AB(Comisión Chilena de Energía Nuclear, Casilla 188-D, Santiago, Chile), AC(Comisión Chilena de Energía Nuclear, Casilla 188-D, Santiago, Chile ; Center for Research and Applications in Plasma Physics and Pulsed Power, P4, Chile), AD(Comisión Chilena de Energía Nuclear, Casilla 188-D, Santiago, Chile), AE(Center for Research and Applications in Plasma Physics and Pulsed Power, P4, Chile), AF(Centro Atómico Bariloche and Instituto Balseiro, 8400 Bariloche, Argentina), AG(CNEA-CONICET and Universidad Nacional del Centro, 7000 Tandil, Argentina), AH(Center for Research and Applications in Plasma Physics and Pulsed Power, P4, Chile ; Dicontek, Pasaje Galicia 1365, La Florida, Santiago, Chile), AI(Comisión Chilena de Energía Nuclear, Casilla 188-D, Santiago, Chile ; Center for Research and Applications in Plasma Physics and Pulsed Power, P4, Chile), AJ(Center for Research and Applications in Plasma Physics and Pulsed Power, P4, Chile ; Universidad de Talca, Facultad de Ingeniería, Campus Curicó, Kilómetro 1 Camino a Los Niches, Curicó, Chile)
Publication:
Journal of Physics D: Applied Physics, Volume 41, Issue 20, article id. 205215, 7 pp. (2008).
Publication Date:
10/2008
Origin:
IOP
DOI:
10.1088/0022-3727/41/20/205215
Bibliographic Code:
2008JPhD...41t5215S

Abstract

Neutron emission from a deuterium plasma pinch generated in a very small plasma focus (6 mm anode diameter) operating at only tens of joules is presented. A maximum current of 50 kA is achieved 140 ns after the beginning of the discharge, when the device is charged at 50 J (160 nF capacitor bank, 38 nH, 20-30 kV, 32-72 J). Although the stored energy is very low, the estimated energy density in the plasma and the energy per particle in the plasma are of the same order as in higher energy devices. The dependence of the neutron yield on the filling pressure of deuterium was obtained for discharges with 50 and 67 J stored in the capacitor bank. Neutrons were measured by means of a system based on a 3He proportional counter in current mode. The average neutron yield for 50 J discharges at 6 mbar was (1.2 ± 0.5) × 104 neutrons per shot, and (3.6 ± 1.6) × 104 for 67 J discharges at 9 mbar. The maximum energy of the neutrons was (2.7 ± 1.8) MeV. Possible applications related to substance detection and others are discussed.
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