A. Elshafiey, J. Musk, S. Pikuz, T. Shelkovenko, D. Hammer
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引用次数: 0
摘要
我们正计划使用~ 20ps时间分辨率的x射线条纹相机对混合x射线夹击产生的x射线爆发进行详细的光谱研究。目的是研究在产生x射线爆发的微挤压中是否发生辐射坍缩。为了做到这一点,我们需要在±1ns内可重复的混合X-pinch中产生一次强x射线爆发。作为第一步,我们通过改变两个锥形电极之间的间隙距离,优化了由Al, Ag, Mo和Ti制成的混合X-Pinches,使所有不同材料的单位长度质量保持不变。对于所有材料,0.5-1.5毫米的间隙似乎是令人满意的,以确保从250-300 kA, 50 ns上升时间脉冲XP脉冲电源上的电流脉冲的一个微夹。此外,对镀铝钼丝进行了时间分辨和时间积分的x射线光谱分析。得到一般参数,如;热点源大小,辐射能量,x射线能谱和等离子体密度和温度
Optimizing micropinches produced by Hybridx-Pinches for high time resolution X-Rayspectroscopy
We are planning detailed spectroscopic studies of the X-ray bursts produced by hybrid X-pinches using ~20 ps time resolution X-ray streak cameras. The purpose is to investigate whether radiative collapse occurs in the micropinches that produce the X-ray bursts. In order to do that, we want 1 strong X-ray burst from the hybrid X-pinch at a time that is reproducible within ± 1 ns. As a first step, we have optimized Hybrid X-Pinches made of Al, Ag, Mo, and Ti by changing the gap distance between the two conical electrodes, keeping the mass per unit length constant across all the different materials. For all materials, 0.5-1.5 mm gap appears to be satisfactory to assure a single micropinch from a 250–300 kA, 50 ns rise time current pulse on the XP pulsed power generator. In addition, time resolved, and time-integrated X-ray spectroscopy was carried out on molybdenum wires coated with aluminum. General parameters were obtained such as; hotspot source size, radiated energy, x-rays energy spectrum and plasma density and temperature