Liangping W.,Northwest Institute of Nuclear Technology |
Liangping W.,Key State Laboratory of Simulation and Effect for Intense Pulse Radiation |
Mo L.,Northwest Institute of Nuclear Technology |
Mo L.,Key State Laboratory of Simulation and Effect for Intense Pulse Radiation |
And 7 more authors.
Physics of Plasmas | Year: 2014
The electromagnetic energy conversion in the Z-pinch process of single planar wire arrays was studied on Qiangguang generator (1.5 MA, 100 ns). Electrical diagnostics were established to monitor the voltage of the cathode-anode gap and the load current for calculating the electromagnetic energy. Lumped-element circuit model of wire arrays was employed to analyze the electromagnetic energy conversion. Inductance as well as resistance of a wire array during the Z-pinch process was also investigated. Experimental data indicate that the electromagnetic energy is mainly converted to magnetic energy and kinetic energy and ohmic heating energy can be neglected before the final stagnation. The kinetic energy can be responsible for the x-ray radiation before the peak power. After the stagnation, the electromagnetic energy coupled by the load continues increasing and the resistance of the load achieves its maximum of 0.6-1.0 Ω in about 10-20 ns. © 2014 AIP Publishing LLC.
Wang L.,Key State Laboratory of Simulation and Effect for Intense Pulse Radiation |
Wang L.,Northwest Institute of Nuclear Technology |
Li M.,Key State Laboratory of Simulation and Effect for Intense Pulse Radiation |
Li M.,Northwest Institute of Nuclear Technology |
And 8 more authors.
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2014
Planar wire arrays Z pinches were conducted on Qiangguang generator (1.5 MA, 100 ns). The loads in the experiments varied their row widths (6-24 mm) and wire numbers (10-34). The scaling of the implosion times, radiation yields and power with the parameter of the loads, such as array masses, inter-wire gaps, and array widths were investigated. The images of the soft X-ray camera show that the trailing mass, precursor column, and R-T instability exist during the implosion phase, and kink instability will occur and rapidly develop after stagnation. The experimental results show that the product of the line mass and the square row width is a critical factor. This factor can affect the implosion times and the X-ray products of wire arrays with different parameters, the optimum range is 200~400 μg·cm for Qiangguang generator. The results also imply that the inter-wire gap should be smaller than 1 mm. The maximum X-ray total energy is 22 kJ with the peak power 630 GW while the maximum K-shell product is 3.9 kJ with 158 GW.