title: Ice particles trapped by temperature gradients at mbar pressure.
abstract: In laboratory experiments we observe that ice particles (≤100 μm) entrained in a low pressure atmosphere (~1 mbar) get trapped by temperature gradients between three reservoirs at different temperature. Confining elements are a peltier element at 250 K (bottom), a liquid nitrogen reservoir at 77 K (top), and the surrounding vacuum chamber at 293 K. Particle levitation and trapping is modeled by an interplay of thermophoresis, photophoresis, and gravity. A number of ice particles are trapped simultaneously in close spatial distance to each other at least up to minutes and are accessible for further experiments.
authors: Fakultät für Physik, Universität Diusburg-Essen, Lotharstrasse 1, 47057 Duisburg, Germany. thorben.kelling@uni-due.de
authors: Thorben
authors: T
authors: Kelling
authors: Gerhard
authors: G
authors: Wurm
authors: Christoph
authors: C
authors: Dürmann