title: One-dimensional vertical dust strings in a glass box.
abstract: The oscillation spectrum of a one-dimensional vertical dust string formed inside a glass box on top of the lower electrode in a gaseous electronics conference (GEC) reference cell was studied. A mechanism for creating a single vertical dust string is described. It is shown that the oscillation amplitudes, resonance frequencies, damping coefficients, and oscillation phases of the dust particles separate into two distinct groups. One group exhibits low damping coefficients, increasing amplitudes, and decreasing resonance frequencies for dust particles closer to the lower electrode. The other group shows high damping coefficients but anomalous resonance frequencies and amplitudes. At low oscillation frequencies, the two groups are also separated by a π phase difference. One possible cause for the difference in behavior between the two groups is discussed.
authors.affiliation: Center for Astrophysics, Space Physics, and Engineering Research (CASPER) Baylor University Waco, Texas 76798-7310, USA. j_kong@baylor.edu
authors.forename: Jie
authors.initials: J
authors.lastname: Kong
authors.forename: Truell W
authors.initials: TW
authors.lastname: Hyde
authors.forename: Lorin
authors.initials: L
authors.lastname: Matthews
authors.forename: Ke
authors.initials: K
authors.lastname: Qiao
authors.forename: Zhuanhao
authors.initials: Z
authors.lastname: Zhang
authors.forename: Angela
authors.initials: A
authors.lastname: Douglass