Peterson Byron J, Parchamy Homaira, Ashikawa Naoko, Kawashima Hisato, Konoshima Shigeru, Kostryukov Artem Yu, Miroshnikov Igor V, Seo Dongcheol, Omori T
National Institute for Fusion Science, Toki 509-5292, Japan.
Rev Sci Instrum. 2008 Oct;79(10):10E301. doi: 10.1063/1.2988822.
Imaging bolometers utilize an infrared (IR) video camera to measure the change in temperature of a thin foil exposed to the plasma radiation, thereby avoiding the risks of conventional resistive bolometers related to electric cabling and vacuum feedthroughs in a reactor environment. A prototype of the IR imaging video bolometer (IRVB) has been installed and operated on the JT-60U tokamak demonstrating its applicability to a reactor environment and its ability to provide two-dimensional measurements of the radiation emissivity in a poloidal cross section. In this paper we review this development and present the first results of an upgraded version of this IRVB on JT-60U. This upgrade utilizes a state-of-the-art IR camera (FLIR/Indigo Phoenix-InSb) (3-5 microm, 256 x 360 pixels, 345 Hz, 11 mK) mounted in a neutron/gamma/magnetic shield behind a 3.6 m IR periscope consisting of CaF(2) optics and an aluminum mirror. The IRVB foil is 7 cm x 9 cm x 5 microm tantalum. A noise equivalent power density of 300 microW/cm(2) is achieved with 40 x 24 channels and a time response of 10 ms or 23 microW/cm(2) for 16 x 12 channels and a time response of 33 ms, which is 30 times better than the previous version of the IRVB on JT-60U.
成像测辐射热计利用红外（IR）摄像机来测量暴露于等离子体辐射下的薄箔的温度变化，从而避免了传统电阻测辐射热计在反应堆环境中与电缆和真空馈通相关的风险。红外成像视频测辐射热计（IRVB）的一个原型已安装在JT - 60U托卡马克装置上并运行，展示了其在反应堆环境中的适用性以及在极向截面中提供辐射发射率二维测量的能力。在本文中，我们回顾了这一进展，并展示了JT - 60U上该IRVB升级版的首批结果。此次升级采用了一台最先进的红外摄像机（FLIR/Indigo Phoenix - InSb）（3 - 5微米，256×360像素，345赫兹，11毫开尔文），安装在一个由CaF₂光学器件和铝镜组成的3.6米红外潜望镜后面的中子/伽马/磁屏蔽装置中。IRVB箔是7厘米×9厘米×5微米的钽箔。40×24通道时实现了300微瓦/平方厘米的噪声等效功率密度，时间响应为10毫秒；16×12通道时为23微瓦/平方厘米，时间响应为33毫秒，这比JT - 60U上IRVB的前一版本提高了30倍。
