TEMPERATURE MEASUREMENTS UNDER PULSED LASER IRRADIATION WITH VARIED INITIAL HEATING

Abstract

The results of measuring the temperature in a platinum filament tape, pre-heated in vacuum by direct current and irradiated a millisecond laser pulse, are presented. Gradual increase of the previous heating at a constant power irradiation density allows to receive the melted layer of different thickness without a destruction of the tape. The measurement have been carried out by photoemission method at the time resolution of 5 μs under the method and apparatus error of 0,3 % и 0,5 %, respectively. Such a method of combined heating can be used in metrological measurements under a solid-liquid phase equilibrium temperature.

Keywords

• platinum
• the temperature of the phase equilibrium photoemission method