Temperature Control for Laser-Heated Diamond Anvil Cell

Abstract

Laser-heated diamond anvil cell is a powerful tool to generate ultra-high pressure and temperature. However, the temperature stability of laser-heated sample in a diamond anvil cell is correlated closely with stability of the absorption coefficient of the sample. A numeric control of laser power is occasionally effective to maintain a given temperature under the circumstances. In this paper, critical problems to realize a stable heating and principles of dynamic control of the sample temperature are discussed in detail. The software developed to enable temperature control using a personal computer has been shown with actual examples of the improved stability of the sample temperature.