BLISS for SPICA: far-IR spectroscopy at the background limit
BLISS for SPICA: far-IR spectroscopy at the background limit
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SPICA 的 BLISS：背景极限下的远红外光谱
DOI：
10.1117/12.672544
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
C. Bradford
中科院分区：
文献类型：
--
作者：
C. Bradford
我们提出的背景限制红外亚毫米光谱仪（布利斯）的日本SPICA使命下一个十年初推出的概念。SPICA将是一个3.5米的望远镜，冷却到低于5 K，并提供了远红外观测的潜力，仅限于黄道尘埃排放。布利斯将在整个40-600 μm波段提供该背景限制下的中等分辨率（R 1000）光谱。BLISS-SPICA的灵敏度低于10-20 Wm 2，在适度的积分，将使第一次调查光谱的红移0.5至5星系产生的远红外背景。这两个WaFIRS波导光栅光谱仪，和新的紧凑的交叉分散中阶梯光栅的设计正在考虑之中。探测器必须具有约3x 10 -20 W/kHz的灵敏度，并具有良好的效率。最有前途的近期方法，以覆盖整个频带的过渡边缘辐射热计冷却到~50 mK的绝热退磁冰箱。
We present concepts for the background-limited infrared-submillimeter spectrograph (BLISS) for the Japanese SPICA mission to launch early next decade. SPICA will be a 3.5-meter telescope cooled to below 5 K, and offers the potential for far-IR observations limited only by the zodiacal dust emission. BLISS will provide moderate-resolution (R 1000) spectroscopy at this background limit throughout the 40-600 μm band. With sensitivities below 10-20 Wm2 in modest integrations, BLISS-SPICA will enable the first survey spectroscopy of the redshift 0.5 to 5 galaxies which produce the far-IR background. Both WaFIRS waveguide grating spectrometers, and new compact cross-dispersed echelle grating designs are under consideration. Detectors must have sensitivities around 3x10-20 W/√Hz and have good efficiency. The most promising near-term approaches to cover the full band are transition-edge bolometers cooled to ~50 mK with an adiabatic demagnetization refrigerator.