论文标题
冲击在2D尘土飞扬的血浆中传播，而仅由于气体摩擦而衰减少。
Shocks propagate in a 2D dusty plasma with less attenuation than that due to gas friction alone
论文作者
论文摘要
在尘土飞扬的等离子体中，观察到冲动产生的冲击，即爆炸波，衰减比仅由于气体摩擦而预期的要小。在实验中，将单层的微粒在射频发光排放等离子体中悬浮。在这一层中，微粒被自组织为2D固体的强烈耦合等离子体，该等离子体受到电线的活塞样机械运动的扰动。为了激发爆炸波，突然停止了电线的运动，因此机械能的输入在已知的时间停止。可以看出，随着它在整个层传播时，爆炸波的振幅持续了很少的衰变。在先前使用3D微粒云的实验中，该结果扩展到了2D云的情况。在我们的云中，观察到平面外位移，贷款支持，以使离子流中的唤醒驱动的不稳定性提供了尽管存在气体阻尼，但仍能维持爆炸波的幅度。
In a dusty plasma, an impulsively generated shock, i.e., blast wave, was observed to decay less than would be expected due to gas friction alone. In the experiment, a single layer of microparticles was levitated in a radio-frequency glow-discharge plasma. In this layer, the microparticles were self-organized as a 2D solid-like strongly coupled plasma, which was perturbed by the piston-like mechanical movement of a wire. To excite a blast wave, the wire's motion was abruptly stopped, so that the input of mechanical energy ceased at a known time. It was seen that, as it propagated across the layer, the blast wave's amplitude persisted with little decay. This result extends similar findings, in previous experiments with 3D microparticle clouds, to the case of 2D clouds. In our cloud, out-of-plane displacements were observed, lending support to the possibility that an instability, driven by wakes in the ion flow, provides energy that sustains the blast wave's amplitude, despite the presence of gas damping.
