1-D axial X-ray power distribution of wire-array implosions
Abstract
A time-space-resolved 1-D X-ray imaging system is developed to investigate the X-ray power distribution with one-dimensional space and continuous time resolution in Z-pinch experiments performed on Angara-5-1 facility.A slit relays the 1-D image of the pinch to a scintillator which converts X-ray to visible light,and the image is subsequently relayed to the cathode of an optical streak camera via an optical fiber array,optical fiber bundles and a lens and finally the time resolved 1-D X-ray distribution is obtained.As the inner plasma reduced the R-T instability of the implosion,the(40+20) double tungsten array implosion had a better axial implosion uniformity and synchronization than the 40 single tungsten array implosion,as well as the higher peak radiated X-ray power.Axial implosion synchronization in implosions of(60+30) double tungsten array was nearly the same in case of 90 single tungsten array because of the bending,distorting and breaking of the loads.For specific facility,current and wire array configuration,higher X-ray radiation power corresponds to better axial uniformity and synchronization of implosion and faster rise time.Analysis indicates that better axial implosion synchronization corresponds to higher X-ray power,and faster rise time of the local X-ray pulse corresponds to higher radiation power.