Journal
MEASUREMENT SCIENCE AND TECHNOLOGY
Volume 28, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6501/28/1/015201
Keywords
thermometry; thermographic phosphor; cryogenic temperature; two-dimensional; lifetime
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [2016R1D1A1A02937232]
- CAMPUS-ASIA program
- National Research Foundation of Korea [2016R1D1A1A02937232] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, lifetime-based thermographic phosphor thermometry was developed for 2D temperature measurements in a cryogenic temperature environment. A chamber was set up to provide such an environment with temperatures of 300-110 K and accuracy of +/- 3.5 K. Mg4FGeO6:Mn was used as a sensor material, which was excited by a pulsed UV LED. A high-speed camera with a frequency of 8000 Hz was used for the phosphor thermometry. Calibration was performed at temperatures ranging from 110 to 290 K. The calibration results clearly show variation in the lifetime at different temperatures, and the calibration error is within 1.7%. This measurement is demonstrated in a 2D temperature measurement of an aluminum plate with a heater for both steady and unsteady heat transfer conditions. The measurement results were compared with thermocouple measurements to validate the method.
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