Calibration and sensitivity of the infrared imaging video bolometer
Calibration and sensitivity of the infrared imaging video bolometer
复制标题
红外成像视频测辐射热计的标定和灵敏度
DOI：
10.1063/1.1537031
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发表时间：
2003
影响因子：
1.6
通讯作者：
S. Sudo
中科院分区：
文献类型：
--
作者：
B. Peterson;A. Kostrioukov;N. Ashikawa;M. Osakabe;S. Sudo
红外（IR）成像视频测辐射热计（IRVB）是一种成像测辐射热计，它使用大（9 cm×9 cm）薄（1μm）金箔和红外相机来提供等离子体辐射的图像。使用灯对 IRVB 进行校准，以补偿由于石墨使箔变黑以提高红外发射率而导致的箔厚度及其热性能的不均匀性。该校准显示，与箔中心区域的热导率和箔厚度的乘积成比例的校准系数接近预期值，而这些值在箔边缘附近异常高。与热扩散率成比例的校准系数比中心处的预期值小 2 倍，并且在箔片边缘处进一步下降。使用 IRVB 噪声等效功率的导出表达式，灵敏度比较显示使用当前 IR 技术的 IRVB 的灵敏度比同等技术低约 200 倍。
The infrared (IR) imaging video bolometer (IRVB) is an imaging bolometer which uses a large (9 cm×9 cm) thin (1 μm) gold foil and an IR camera to provide images of radiation from the plasma. Calibration of the IRVB using a lamp has been performed to compensate for any nonuniformities in the foil’s thickness and its thermal properties due to blackening of the foil with graphite to improve the IR emissivity. This calibration revealed close to expected values for the calibration coefficient proportional to the product of the thermal conductivity and the foil thickness in the central region of the foil, while these values were anomalously high near the foil edge. The calibration coefficient proportional to the thermal diffusivity is a factor of 2 smaller than the expected value at the center and drops further at the edge of the foil. Using a derived expression for the IRVB noise equivalent power, a sensitivity comparison shows the IRVB using current IR technologies to be ∼200 times less sensitive than an equi...