Menzel K O, Arp O, Piel A
Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität, Kiel, Germany.
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jul;84(1 Pt 2):016405. doi: 10.1103/PhysRevE.84.016405. Epub 2011 Jul 18.
Recent investigations of dust-density waves in a dusty plasma under microgravity conditions [K. O. Menzel et al., Phys. Rev. Lett. 104, 235002 (2010)] showed that the wave field consists of distinct regions of different frequencies. These so-called frequency clusters are known from simulations of chains of mutually coupled van der Pol oscillators. The behavior of distinct oscillators adjacent to the cluster boundaries were studied numerically. The interaction of these oscillators leads to periodic frequency pulling, a typical feature of driven van der Pol oscillators that is also observed in our experiments.
最近在微重力条件下对尘埃等离子体中尘埃密度波的研究[K. O. 门泽尔等人，《物理评论快报》104, 235002 (2010)]表明，波场由不同频率的不同区域组成。这些所谓的频率簇在相互耦合的范德波尔振荡器链的模拟中是已知的。对靠近簇边界的不同振荡器的行为进行了数值研究。这些振荡器的相互作用导致周期性频率牵引，这是受驱动的范德波尔振荡器的一个典型特征，在我们的实验中也观察到了。
