You S, Yun G S, Bellan P M
California Institute of Technology, Pasadena, 91125, USA.
Phys Rev Lett. 2005 Jul 22;95(4):045002. doi: 10.1103/PhysRevLett.95.045002.
Highly collimated, plasma-filled magnetic-flux tubes are frequently observed on galactic, stellar, and laboratory scales. We propose that a single, universal magnetohydrodynamic pumping process explains why such collimated, plasma-filled magnetic-flux tubes are ubiquitous. Experimental evidence from carefully diagnosed laboratory simulations of astrophysical jets confirms this assertion and is reported here. The magnetohydrodynamic process pumps plasma into a magnetic-flux tube and the stagnation of the resulting flow causes this flux tube to become collimated.
高度准直、充满等离子体的磁通量管在星系、恒星和实验室尺度上经常被观测到。我们提出，一个单一的、通用的磁流体动力学泵浦过程可以解释为什么这种准直的、充满等离子体的磁通量管无处不在。来自对天体物理喷流进行仔细诊断的实验室模拟的实验证据证实了这一论断，并在此报告。磁流体动力学过程将等离子体泵入磁通量管，由此产生的流动停滞导致该通量管变得准直。
