【摘要】 在室温下测量了LATGS悬空自由支撑结构热释电探测器在1～200kHZ频率范围内的噪声电压频谱,观察到噪声峰结构。进而在室温下测量了LATGS响应元在1～100kHz范围内的介质损耗频谱,发现与噪声峰位置对应的峰结构,峰的位置不随测量时间和外加直流电场的改变而变化。从热释电探测器的噪声理论和热释电状态方程出发,对实验结果进行了讨论。更多还原

【Abstract】 The noise voltage spectra of freely-suspended LATGS pyroeleotrio detectors are measured in the frequency range of 1～200kHz at room temperature. The sharp noise peaks are observed. The dielectric loss spectra of LATGS detector elements are also measured from 1～100 kHz at room temperature, in which the dielectric loss peaks are observed at about the same frequencies as for those peaks in the noise voltage spectra. The frequency positions of the peaks are quite stable during the repeated measurements as well as under the external do bias voltages. The experimental results are discussed with the noise theory for pyroelectric detectors and the equations of state for pyroelectric elements.更多还原