论文标题
查看密集等离子体焦点外的电场的第一个实验表明轴向磁场在捏阶段之前和之后存在
First experiments looking at electric field outside the Dense Plasma Focus show axial magnetic field exists before, during and after the pinch phase
论文作者
论文摘要
最近在华沙PF-1000设施上使用15个框架干涉法的实验证实了中子发射与自发自我组织，相对持久的有限等离子体结构之间的关联。该关联的一个关键方面是对轴向磁场的同时观察，该磁场可以使磁通线密集覆盖闭合的表面，从而产生“磁通量表面”。这种3维（3-D）磁场结构的演变必然伴随着诱导的电场，该电场可以沿着磁性结构内包含的轨迹提供很长的（理论上无限）的加速度路径长度，从而导致高离子动能，从而导致高反应速率。相关的电荷和当前密度可能与在等离子体之外测得的电量表电位和磁性矢量电位有关。我们报告了我们对等离子体重点以外的这些领域的第一个观察结果，并讨论了它们的一般特征。报道的技术能够以与电荷密度的分布和方位角电流密度的变化速率（“电磁结构”）相关的数量来对信号进行明确的第一原理解释。它是非侵入性的，对等离子体的非轴对称方面完全不敏感。我们的第一个结果表明，在捏相相位，期间和之后，存在于方位角电流密度分布对称的轴向磁场。
Recent experiments using 15 frame interferometry on PF-1000 facility in Warsaw confirm the association between neutron emission and spontaneously self-organized, relatively long lasting, finite plasma structures. A crucial aspect of this association is the simultaneous observation of an axial magnetic field, which can allow magnetic flux lines to densely cover closed surfaces creating "magnetic flux surfaces". Evolution of such 3-dimensional (3-D) magnetic field structures is necessarily accompanied by induced electric field that can provide a very long (theoretically infinite) acceleration path length along a trajectory enclosed within the magnetic structure leading to high ion kinetic energy, resulting in a high reaction rate. Associated charge and current densities can be related to electric scalar potential and magnetic vector potential measured outside the plasma. We report our first observations of these fields outside the plasma focus and discuss their general features. The reported technique is capable of unambiguous first-principles interpretation of signals in terms of quantities related to distributions of charge density and rate of change of azimuthal current density ("electromagnetic structure") in the plasma focus. It is non-intrusive and completely insensitive to non-axisymmetric aspects of plasma. Our first results show that axial magnetic field generated by azimuthal current density distribution symmetric about the axis exists before, during and after the pinch phase.
