Absolute calibration of a streaked optical pyrometer at nanosecond time scale with a luminescent concentrator - Institut d'Optique Graduate School Access content directly
Journal Articles Review of Scientific Instruments Year : 2023

Absolute calibration of a streaked optical pyrometer at nanosecond time scale with a luminescent concentrator

M. Nourry-Martin
A. Denoeud
  • Function : Author
C. Chollet
  • Function : Author
M. Bonneau
  • Function : Author
S. Brygoo
S. Darbon
  • Function : Author
F. Balembois

Abstract

The Streaked Optical Pyrometer (SOP) is a visible diagnostic widely used to study the warm dense matter regime at high energy laser facilities, gas guns, or ion accelerators. It is usually coupled with a Velocity Interferometer System for Any Reflector (VISAR) diagnostic for simultaneous shock wave velocity, reflectivity, and temperature measurements to study the Equation of State (EOS) of materials. While VISAR is a well-mastered technology that provides velocity measurements with low relative uncertainties (close to percent), SOP diagnostics still suffer from high imprecision. In this article, we present a new calibration method in order to obtain absolute temperature measurements with reduced uncertainties. This approach is based on a novel light source: a Ce:YAG luminescent concentrator pumped by LEDs. This device produces enough optical power for calibration at the nanosecond sweep duration of the streak camera. As a demonstration, it has first been installed at the LULI facility and tested on quartz samples shocked at temperatures above 4000 K.
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Dates and versions

hal-04434962 , version 1 (02-02-2024)

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M. Nourry-Martin, A. Denoeud, C. Chollet, M. Bonneau, T. Vinci, et al.. Absolute calibration of a streaked optical pyrometer at nanosecond time scale with a luminescent concentrator. Review of Scientific Instruments, 2023, 94 (8), pp.083502. ⟨10.1063/5.0145506⟩. ⟨hal-04434962⟩
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