Silicon nitride micromesh bolometer arrays for SPIRE
Silicon nitride micromesh bolometer arrays for SPIRE
复制标题
适用于 SPIRE 的氮化硅微网测辐射热计阵列
DOI：
--
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
A. Turner
中科院分区：
文献类型：
--
作者：
J. Bock;J. Glenn;S. Grannan;K. Irwin;A. Lange;H. Leduc;A. Turner
我们正在为远红外和亚毫米空间望远镜（FIRST）的光谱和光度成像接收器（SPIRE）开发基于氮化硅微网吸收器的辐射热计阵列。辐射热计耦合到一个紧密排列的阵列1 f（λ）的feedhorns认为通过一个冷却孔径光阑的主镜。喇叭天线耦合测辐射热计最大限度地减少了探测器面积和吞吐量，并具有良好的光学效率。1 f（λ）喇叭天线阵列提供比2 f（λ）喇叭天线阵列更高的映射速度，并且减少了产生完全采样映射所需的抖动数量，但以更多检测器为代价。单个氮化硅微网测辐射热计已经能够满足SPIRE的性能要求。与此同时，我们正在开发由SQUID电流放大器读出的过渡边缘探测器。在300 mK时可获得的相对较大的冷却功率使阵列能够耦合到冷SQUID多路复用器，从而创建单片完全多路复用阵列，并使SPIRE的大格式阵列成为可能。
We are developing arrays of bolometers based on silicon nitride micromesh absorbers for the Spectral & Photometric Imaging Receiver (SPIRE) on the Far Infra-Red and Submillimeter Space Telescope (FIRST). The bolometers are coupled to a close-packed array of 1 f(lambda) feedhorns which views the primary mirror through a cooled aperture stop. Feedhorn-coupled bolometers minimize the detector area and throughput and have good optical efficiency. A 1 f(lambda) feedhorn array provides, higher mapping speed than a 2 f(lambda) feedhorn array and reduces the number of jitters required to produce a fully sampled map, but at the cost of more detectors. Individual silicon nitride micromesh bolometers are already able to meet the performance requirements of SPIRE. In parallel we are developing transition-edge detectors read out by SQUID current amplifier. The relatively large cooling power available at 300 mK enables the array to be coupled to a cold SQUID multiplexer, creating a monolithic fully multiplexed array and making large format arrays possible for SPIRE.