Application of a high speed, low temperature infrared pyrometer in pulsed power experiments

Abstract

A new, multichannel infrared (IR) pyrometer has been constructed that is capable of measuring low temperature changes (<100 °C) at high speed (multi-MHz). The pyrometer has four IR channels spanning 1–11 μm and uses 1 mm optical fibers to relay the light from the center of a pulsed power experiment to the detectors. Broad IR passbands are used to increase sensitivity while preserving high accuracy in the temperature measurement (<15% for the absolute temperature (K) up to 1300 K). An application of the pyrometer in material property measurements of high strain at high strain rate is described.