Abstract
Our work is dedicated to pinch effect occurring during current discharge in deuterium plasma, and our results are connected with two devices – plasma focus PFZ, situated in the Faculty of Electrical Engineering, CTU, Prague, and Z-pinch GIT-12, which is situated in the Institute of High Current Electronics, Tomsk. During fusion reactions that proceed in plasma during discharge, neutrons are produced. We use neutrons as instrument for plasma diagnostics. Despite of the advantage that neutrons do not interact with electric and magnetic fields inside device, they are inevitably scattered by materials that are placed between their source and probe, and information about plasma from which they come from is distorted. For estimation of rate of neutron scattering we use MCNP code.
Highlights
One of the most remarkable phenomena of plasma physics is pinch effect which proceeds if sufficiently high current passes through plasma
Such high current generates magnetic field force that compresses current layer radially – that leads to great increase of temperature in place of pinched current
If plasma is made of suitable gas like deuterium or tritium, we can observe fusion reactions during pinch effect
Summary
One of the most remarkable phenomena of plasma physics is pinch effect which proceeds if sufficiently high current passes through plasma. Plasma focus is device that is mainly composed of two cylindrical electrodes placed in vessel which is filled by isotope of hydrogen (mostly deuterium). Between these electrodes current layer is formed (in most cases by discharge of capacitors) and moves in front of inner electrode where is compressed, and pinch effect proceeds. Device GIT-12 is situated in the Institute of High Current Electronics, Tomsk Operation of this device is based on principle of gas-puff. Both mentioned devices have vessel filled with deuterium, so during discharge D−D reactions proceed within.
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