Ultra-cold window for high-sensitive radio sensing

2015 Fiscal Year Final Research Report

• Project/Area Number: 25610064
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: Tajima Osamu 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 准教授 (80391704)
• Co-Investigator(Renkei-kenkyūsha): Kawai Masanori 大学共同利用機関法人 高エネルギー加速器研究機構, 素粒子原子核研究所, 技師 (50391735)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 宇宙マイクロ波背景放射 / CMB / 極低温 / ミリ波

Outline of Final Research Achievements

In a field of a high-sensitive radio sensing, e.g. observation of the cosmic microwave background radiation, our main approach for improving the sensitivity of the system is a combination low-temperature detectors (i.e., low noise) and a large aperture (i.e., high photon statistics). A big difficulty of this approach is that the large aperture induces extra thermal radiations, i.e. infra-red radiations, into the low-temperature detectors. We invented a technology to solve this difficulty: Radio-transparent multi-layer insulation, named RT-MLI. The RT-MLI is transparent for the radio, however, it effectively reflects the infra-red radiations. We proofed this technology based on the laboratory tests. We also developed various applications, e.g. prevention of dew condensation in a meteorological atmospheric monitor.

Free Research Field

宇宙素粒子物理学