Speaker
zhen yang
(China Academy of Engineering Physics)
Description
A kind of compact pulsed neutron generators with vacuum arc ion sources are widely used in neutron radiography, elemental analysis and illicit materials detection. Different modifications for the neutron generators developed at Institute of Fluid Physics(IFP)were investigated in this work. In order to increase the monatomic ions composition, a magnetic filed was applied in the plasma expanding region of the ion source. The reduction of the metallic ions in the beam is benefit for reducing the target sputtering, meanwhile increases the efficiency of neutron flux. Large amount of secondary electrons are harmful for the neutron generator operation. An idea of using a ZnO non-linear resistor with a grid to provide constant self-biased voltage to suppress the secondary electrons was introduced. Metal deuteride films as the target prepared by reactive plasma-assisted sputter deposition were investigated here. The neutron emission was measured when the neutron generator operating at 100 kV acceleration potential, ~10^-4 Pa vacuum environment and 1 Hz repetition rate. The neutron yields for different deuteride targets were measured and analyzed in the present work.
Primary author
zhen yang
(China Academy of Engineering Physics)
