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首页> 外文会议>Instrumentation and Measurement Technology Conference (I2MTC), 2012 IEEE International >Fast Johnson noise thermometry using a temperature dependent sensor
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Fast Johnson noise thermometry using a temperature dependent sensor

机译：使用温度相关传感器进行快速Johnson噪声测温

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Johnson noise thermometry is a well established technique that allows the determination of the temperature starting from the measurement of the thermal noise produced by a known resistance at thermal equilibrium. Notwithstanding that, under proper conditions, the Johnson noise thermometer is a primary thermometer, the very long measurement time that is required to reach accuracies in the order of a fraction of a Kelvin is possibly the main reason why it is used only in a limited set of application fields. Here we propose to employ a strongly temperature dependent device as a sensor, namely a semiconductor diode at equilibrium, in order to significantly reduce the measurement time. It will be shown how, by means of the simultaneous measurements of the noise produced by the sensor device (diode) and by a high accuracy and high stability reference resistor, the sensor can be calibrated with high accuracy. Preliminary results are presented demonstrating the effectiveness of the approach we propose and the possibility of reaching accuracies in the order of a small fraction of 1 K in the temperature range from 300 to 400 K.
机译：约翰逊噪声测温法是一项成熟的技术，可以从测量热平衡下已知电阻产生的热噪声开始确定温度。尽管在适当的条件下，约翰逊噪声温度计是主要温度计，但要达到准确度仅为开氏温度的几分之一所需的非常长的测量时间可能是仅在有限的范围内使用的主要原因应用领域。在这里，我们建议采用一个强烈依赖温度的设备作为传感器，即处于平衡状态的半导体二极管，以显着减少测量时间。将示出如何通过同时测量由传感器装置（二极管）产生的噪声以及通过高精度和高稳定性的参考电阻来高精度地校准传感器。初步结果表明了我们提出的方法的有效性，以及在300至400 K的温度范围内达到1 K很小比例精度的可能性。

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