원문정보
초록
영어
The superconducting accelerator's liquid or superfluid helium cryogenic system requires numerous temperature sensors to precisely monitor key components and ensure the device's safe and stable operation. Uncalibrated temperature sensors are widely used in large scientific facilities owing to their low cost and short supply cycles. This study developed a temperature sensor calibration system suitable for the superfluid helium temperature region. This system combines the comparison method and dynamic calibration while optimizing the calibration approach for different temperature ranges. A total of 20 uncalibrated temperature sensors were calibrated over a temperature range of 300 K to 2 K. Experimental results show that the system can simultaneously calibrate numerous temperature sensors, significantly improving calibration efficiency. In the 4.2 K-2 K temperature region, the calibration accuracy is ±6.035 mK, which meets the engineering application requirements of large scientific facilities.
목차
1. INTRODUCTION
2. CALIBRATION METHODS AND SYSTEMS FOR DEEP CRYOGENIC TEMPERATURE SENSORS
2.1. Selection of Cryogenic Cooling Sources
2.2. Design of temperature sensor calibration system
2.3. Calibration Principles and Methods
2.4. Selection and Installation of Experimental Equipment
3. CALIBRATION METHODS FOR DIFFERENT TEMPERATURE RANGES
3.1. Calibration of the 300 K-4.2 K Temperature Range
3.2. Calibration of the 4.2K-2K Temperature Range
3.3. Analysis of Cooling Rate and Calibration Accuracy inthe 4.2 K–2 K Temperature Range
4. EXPERIMENTAL DATA PROCESSING
4.1 R-T Characteristic Curve Fitting Method
4.2 Experimental Data Analysis
4.3 Uncertainty Analysis
5. CONCLUSION
ACKNOWLEDGMENT
REFERENCES