抄録
No contamination from container is expected to produce the ultrapure material or to minimize the lattice defects in space material experiments in low gravity, typically 1 x 10-3- 1 X 10-6 G. Stable levitation is necessary to achieve these experiments. Such levitation can be attained by two electrostatic forces of a modified two dimensional quadrupole electrode system that we have developed. However, stable levitation will be broken by disturbance such as a residual acceleration due lo motions of the crews, pumps, switching or other operations in the space station, even if only one of these forces acts on the levitated material. Unstable levitation occurs and may cause the failure of the experiment as a result. Hence, it is important to understand the characteristics of the motion of the sample with the disturbance. This report describes locus of motion, period of one cycle and displacement of the levitated material simulated by numerical calculation using computer when the disturbance is a Gaussian distribution varied with lime under low gravity condition. Furthermore, the centrifugal force acting on the sample was also discussed.
