用于探测器阵列特性表征的低温热光源。

A cryogenic thermal source for detector array characterization.

作者信息

Chuss David T, Rostem Karwan, Wollack Edward J, Berman Leah, Colazo Felipe, DeGeorge Martin, Helson Kyle, Sagliocca Marco

机构信息

Department of Physics, Villanova University, 800 E. Lancaster Ave., Villanova, Pennsylvania 19085, USA.

NASA Goddard Space Flight Center, Code 665, Greenbelt, Maryland 20771, USA.

出版信息

Rev Sci Instrum. 2017 Oct;88(10):104501. doi: 10.1063/1.4996751.

DOI:10.1063/1.4996751

PMID:29092463

Abstract

We describe the design, fabrication, and validation of a cryogenically compatible quasioptical thermal source for characterization of detector arrays. The source is constructed using a graphite-loaded epoxy mixture that is molded into a tiled pyramidal structure. The mold is fabricated using a hardened steel template produced via a wire electron discharge machining process. The absorptive mixture is bonded to a copper backplate enabling thermalization of the entire structure and measurement of the source temperature. Measurements indicate that the reflectance of the source is <0.001 across a spectral band extending from 75 to 330 GHz.

摘要

我们描述了一种用于探测器阵列表征的低温兼容准光学热辐射源的设计、制造和验证。该热辐射源由一种石墨填充的环氧树脂混合物制成，模压成平铺的金字塔结构。模具是使用通过电火花线切割加工工艺生产的硬化钢模板制造的。吸收性混合物粘结到铜背板上，使整个结构能够实现热平衡并测量热辐射源的温度。测量结果表明，在75至330 GHz的光谱带范围内，该热辐射源的反射率小于0.001。