Dust-Acoustic Waves in Strongly Coupled Dusty Plasmas Containing Variable-Charge Impurities
XIE Bai-Song1,2,3, HE Kai-Fen1,2,3, M. Y. Yu4
1Key Laboratory in University for Beam Technology and Materials Modification, Beijing Normal University, Beijing 100875
2Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing 100875 (mailing address)
3Beijing Radiation Center, Beijing 100875
4Institut fur Theoretische Physik I, Ruhr-Universitat Bochum, 0-44780 Bochum, Germany
Dust-Acoustic Waves in Strongly Coupled Dusty Plasmas Containing Variable-Charge Impurities
XIE Bai-Song1,2,3;HE Kai-Fen1,2,3;M. Y. Yu4
1Key Laboratory in University for Beam Technology and Materials Modification, Beijing Normal University, Beijing 100875
2Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing 100875 (mailing address)
3Beijing Radiation Center, Beijing 100875
4Institut fur Theoretische Physik I, Ruhr-Universitat Bochum, 0-44780 Bochum, Germany
Abstract： A relatively self-consistent theory of dust-acoustic waves in the strongly coupled dusty plasmas containing variable-charge impurities is given. Relevant physical processes such as dust elastic relaxation and dust charge relaxation are taken into account. It is shown that the negative dispersion of dust-acoustic waves due to the strong correlation of dusts is enhanced in the presence of dust-neutral collisions.
2000, Vol. 17 
