期刊
NEW ASTRONOMY REVIEWS
卷 50, 期 11-12, 页码 960-968出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.newar.2006.09.029
关键词
cosmology; observations; galaxies; clusters
资金
- STFC [PP/D001048/1] Funding Source: UKRI
The APEX-sz instrument is designed for the discovery and study of galaxy clusters at mm-wavelengths using the Sunyaev Zel'dovich effect. The receiver consists of 320 superconducting transition edge sensor (TES) bolometers cooled to 250 mK with the combination of a three stage He sorption fridge and mechanical pulse tube cooler. The detectors are instrumented with a frequency domain multiplexing readout system. The receiver is mounted on the 12 m APEX telescope located at 5100 m on the Atacama plateau in Chile. For the first light engineering deployment of December 2005, the receiver was configured with a 55 element wedge of the bolometers and operating in the 150 GHz atmospheric window. During the engineering run we achieved significant milestones in our instrumentation development efforts, including celestial observations with a monolithically fabricated TES bolometer array cooled with a mechanical cooler and successful implementation of a SQUID-based MHz AC-biased readout. These technology demonstrations point the way toward future large TES bolometer array instruments. Here we describe the results of this deployment and future plans for the APEX-sz instrument. (c) 2006 Elsevier B.V. All rights reserved.
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