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arXiv 2305.04487physics.plasm-ph
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尘埃等离子体系统对外部电荷扰动的响应

Response of a dusty plasma system to external charge perturbations

Hitendra Sarkar, Madhurjya P. Bora

AI总结:

本文通过一维通量修正输运模拟研究运动外部电荷扰动在尘埃等离子体中激发的非线性波结构,发现小振幅扰动产生钉扎包络孤子、大振幅扰动形成色散离子声激波,尘埃颗粒会抑制低速色散激波形成,并用广义Gross-Pitaevskii方程理论验证了模拟结果。

摘要:

本文利用一维通量修正输运模拟,研究了由运动的外部电荷扰动在尘埃等离子体中引起的非线性波结构的激发。等离子体对运动电荷的不同性质有独特的响应,据此,对于小振幅扰动,会产生钉扎包络孤子;对于大振幅扰动,则会形成静电色散离子声激波。研究发现,尘埃颗粒的存在会抑制外部电荷碎片在低速时色散激波的形成。结果还作为广义Gross-Pitaevskii方程的解进行了理论研究,该理论广泛支持了模拟结果。

英文摘要:

The excitation of nonlinear wave structures in a dusty plasma caused by a moving external charge perturbation is examined in this work, which uses a 1-D flux corrected transport simulation. The plasma responds uniquely to different nature of the moving charge, depending on which, for small amplitude perturbations, pinned envelope solitons are generated and electrostatic dispersive ion-acoustic shock waves are formed for a large amplitude perturbation. The presence of dust particles is found to suppress the formation of dispersive shocks at low velocity of the external charge debris. The results are also investigated theoretically as a solution to the generalized Gross-Piteavskii equation, which broadly supports the simulation results.

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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