On the emissivity of wire-grid polarizers for astronomical observations at mm-wavelengths

被引：8

作者：

Schillaci, A. ^{[1
]}

Battistelli, E. ^{[1
]}

D' Alessandro, G. ^{[1
]}

de Bernardis, P. ^{[1
]}

Masi, S. ^{[1
]}

机构：

[1] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

来源：

INFRARED PHYSICS & TECHNOLOGY | 2013年 / 58卷

关键词：

Polarizers; Interferometers; Cosmic Microwave Background; CMB POLARIZATION; MILLIMETER; SPECTRUM;

D O I：

10.1016/j.infrared.2013.01.009

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We have measured, using a custom setup, the emissivity of metallic wire-grids, suitable for polarimeters and interferometers at mm and far infrared wavelengths. We find that the effective emissivity of these devices is of the order of a few %, depending on fabrication technology and aging. We discuss their use in astronomical instruments, with special attention to Martin-Puplett Interferometers in low-background applications, like astronomical observations of the Cosmic Microwave Background. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：64 / 68

页数：5

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