Study of dynamics of hot spots in wire-array Z-pinches

摘要

Hot spots with a high plasma density and temperature spontaneously arise in all kinds of Z-pinches with currents from 0.1 to 4 MA. Instabilities generate bright and hot spots with the enhanced electron temperature and density. The electron temperature of 9 keV was measured in the hot spot of the X-pinch with current of 5 MA [1]. The formation of hot spots can be interpreted as a result of the collapse of the Z-pinch due to the radiative loss of energy and plasma flowing out of the spot. Hot spots carry current and can generate strong MG magnetic fields in the Z pinch. Hot spots contribute to the energy balance and neutron yield in Z pinches.