Open AccessA PORTABLE PULSED NEUTRON GENERATOR
Author(s) -
Alexandros Skoulakis,
G. Androulakis,
E. L. Clark,
S. M. Hassan,
P. Lee,
J. Chatzakis,
Makis Bakarezos,
Vanda Dimitriou,
C. Petridis,
Nektarios A. Papadogiannis,
M. Tatarakis
Publication year - 2014
Publication title -
international journal of modern physics. conference series
Language(s) - English
Resource type - Journals
ISSN - 2010-1945
DOI - 10.1142/s2010194514601276
Subject(s) - neutron , neutron generator , materials science , nuclear engineering , spark gap , neutron source , pulse generator , anode , nanosecond , cathode , explosive material , dense plasma focus , neutron temperature , capacitor , physics , optics , nuclear physics , electrical engineering , plasma , voltage , chemistry , engineering , laser , electrode , organic chemistry , quantum mechanics
The design and construction of a pulsed plasma focus device to be used as a portable neutron source for material analysis such as explosive detection using gamma spectroscopy is presented. The device is capable of operating at a repetitive rate of a few Hz. When deuterium gas is used, up to 10 5 neutrons per shot are expected to be produced with a temporal pulse width of a few tens of nanoseconds. The pulsed operation of the device and its portable size are its main advantage in comparison with the existing continuous neutron sources. Parts of the device include the electrical charging unit, the capacitor bank, the spark switch (spark gap), the trigger unit and the vacuum–fuel chamber / anode–cathode. Numerical simulations are used for the simulation of the electrical characteristics of the device including the scaling of the capacitor bank energies with total current, the pinch current, and the scaling of neutron yields with energies and currents. The MCNPX code is used to simulate the moderation of the produced neutrons in a simplified geometry and subsequently, the interaction of thermal neutrons with a test target and the corresponding prompt γ-ray generation.