Thermal modelling of RLCYC 75: a 2kW electrically calibrated laser calorimeter designed for Laser MegaJoule diagnostics calibration

RLCYC 75 is a new electrically calibrated laser calorimeter especially manufactured by Laser Métrologie to calibrate energy diagnostics of Laser MegaJoule (LMJ). It consists of an optical cavity cooled by a hydraulic system. The system is designed to provide laser power measurements with uncertainty...

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Bibliographic Details
Published in:Journal of physics. Conference series 2012-01, Vol.395 (1), p.12072-8
Main Authors: Crespy, C, Villate, D, Todeschini, M, Laville-Geay, A, Soscia, M
Format: Article
Language:English
Subjects:
Calibration
Diagnostic systems
Equivalence
Holes
Hydraulic equipment
International System of Units
Laser cooling
Lasers
Modelling
Optical measurement
Physics
Power measurement
Power measurements
Thermal analysis
Three dimensional models
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Summary:RLCYC 75 is a new electrically calibrated laser calorimeter especially manufactured by Laser Métrologie to calibrate energy diagnostics of Laser MegaJoule (LMJ). It consists of an optical cavity cooled by a hydraulic system. The system is designed to provide laser power measurements with uncertainty less than 1% at 2kW and traceability to the International System of Units (SI) thanks to electrical calibrations. In this paper, a 3D thermal model is developed to study the thermal equivalence between electrical calibration and optical measurement. The simulation results are crossed with PT100 measurements in order to validate the model. The thermal modelling of the RLCYC 75 calorimeter is a key point to analyse the calorimeter efficiency, thus this work validates the geometrical design of RLCYC 75 calorimeter.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/395/1/012072