Abstract
The time variations of the shape and position of the crystal-melt interface in a crystal pulling system, caused by sudden changes of different parameters, are investigated. Zero pull rate and vacuum surroundings are assumed throughout. In particular, the effects of the variation of the after-heater height and the Peltier current are determined in detail for germanium. It is found that the Peltier current affects the interface more strongly than the after heater.
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