Observation of periodic thermocapillary flow in a molten silicon bridge by using non-contact temperature measurements

摘要

Thermocapillary flow in a bridge of molten silicon under measured oxygen partial pressure in the ambient atmosphere was investigated in terms of fluctuations in the brightness of pixels of CCD images. The fluctuations in the brightness of the CCD images at the silicon surface agree with the temperature fluctuations measured in the bridge by using thermocouples in a mono-ellipsoidal mirror furnace.