Observation of multifractal intermittent dust-acoustic-wave turbulence

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題名:	Observation of multifractal intermittent dust-acoustic-wave turbulence
作者:	伊林;Tsai, Ya-Yi;Chang, Mei-Chu;I, Lin
貢獻者:	理學院物理學系
日期:	2012-10-09
上傳時間:	2026-04-23 12:34:04 (UTC+8)
出版者:	American Physical Society;United States
摘要:	摘要： Intermittent dust acoustic wave turbulence self-excited by downward ion flow in dissipative dusty plasma is experimentally observed and investigated. The power spectra of the temporal dust density fluctuation show distinct bumps in the low-frequency regime and power-law scaling in the high-frequency regime. The structure-function analysis demonstrates the multifractal dynamics of the wave turbulence. Decreasing dissipation by decreasing neutral pressure leads to a more turbulent state with a less distinct low-frequency bump in the power spectrum, more stretched non-Gaussian tails in the histogram of the wave-height increment at a small time interval τ, and a higher degree of multifractality. The loss of long time memory with increasing τ for a more turbulent state causes a change from the distribution with stretched non-Gaussian tails to Gaussian with increasing τ. 其他題名： Phys Rev E Stat Nonlin Soft Matter Phys 出版者： United States 出版日期： 2012-10 出處： Physical review. E, Statistical, nonlinear, and soft matter physics, 2012-10, Vol.86 (4), p.045402, Article 045402 識別號： ISSN: 1539-3755 識別號： ISSN: 1550-2376 識別號： EISSN: 1550-2376 識別號： DOI: 10.1103/PhysRevE.86.045402 識別號： PMID: 23214644
顯示於類別:	[物理學系] 期刊論文

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