论文标题
在液体和固体条件下测得的休克宽度
Shock width measured under liquid and solid conditions in a 2D dusty plasma
论文作者
论文摘要
在液体和固体条件下，与血浆中悬浮的带电微球的二维层相比，比较了冲击的宽度。在这种强烈耦合的灰尘等离子体中，通过以超音速速度移动激发丝，然后将其暂停，从而引起了冲击。用微球层重复运行两种方法：一种结晶状的固体和液体。液体是使用激光加热持续的，否则与固体相同。在液体中发现冲击宽度要比固体中的液体少，而在固体中是4至6个晶格常数。这些测量基于密度曲线的高梯度区域。曲线是从粒子坐标中获得的，该粒子通过高速视频成像测量。通过在冲击的参考框架中，通过一系列图像结合粒子坐标，通过将粒子坐标相结合，从而改善了空间分辨率。
Widths of shocks are compared, under liquid and solid conditions, for a two-dimensional layer of charged microspheres levitated in a plasma. In this strongly coupled dusty plasma, a shock was launched as a blast wave by moving an exciter wire at a supersonic speed and then bringing it to a halt. Runs were repeated with the layer of microspheres prepared two ways: a crystalline-like solid, and a liquid. The liquid was sustained using laser heating, with conditions that were otherwise the same as in the solid. The shock width was found to be less in a liquid than in a solid, where it was 4 to 6 lattice constants. These measurements were based on the high-gradient region of density profiles. The profiles were obtained from particle coordinates, measured by high-speed video imaging. The spatial resolution was improved by combining particle coordinates, in the shock's frame of reference, from a sequence of images.
