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arXiv 1604.04548physics.plasm-ph
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强耦合对等离子体中尘埃声波色散影响的实验观察

Experimental observation of strong coupling effects on the dispersion of dust acoustic waves in a plasma

P. Bandyopadhyay, G. Prasad, A. Sen, P. K. Kaw

摘要:

实验研究了高岭土和$MnO_2$尘埃颗粒混合物在氩等离子体中的低频尘埃声波在强耦合区的色散特性。中性压力在一个很宽的范围内变化,以改变尘埃等离子体的碰撞性质。在低碰撞制度的营业额的色散曲线在较高的波数和由此产生的区域的$\partialω/\partial k < 0$被确定为签名的尘埃尘埃相关性。在高碰撞制度尘埃中性碰撞产生类似的效果,并防止明确识别强耦合效应。

英文摘要:

The dispersion properties of low frequency dust acoustic waves in the strong coupling regime are investigated experimentally in an argon plasma embedded with a mixture of kaolin and $MnO_2$ dust particles. The neutral pressure is varied over a wide range to change the collisional properties of the dusty plasma. In the low collisional regime the turnover of the dispersion curve at higher wave numbers and the resultant region of $\partialω/\partial k < 0$ are identified as signatures of dust-dust correlations. In the high collisional regime dust neutral collisions produce a similar effect and prevent an unambiguous identification of strong coupling effects.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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