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APEX-SZ first light and instrument status

Dobbs, M., Halverson, N. W., Ade, Peter A. R., Basu, K., Beelen, A., Bertoldi, F., Cohalan, C., Cho, H. M., Güsten, R., Holzapfel, W. L., Kermish, Z., Kneissl, R., Kovács, A., Kreysa, E., Lanting, T. M., Lee, A. T., Lueker, M., Mehl, J., Menten, K. M., Muders, D., Nord, M., Plagge, T., Richards, P. L., Schilke, P., Schwan, D., Spieler, H., Weiss, A. and White, M. 2006. APEX-SZ first light and instrument status. New Astronomy Reviews 50 (11-12) , pp. 960-968. 10.1016/j.newar.2006.09.029

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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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: Cosmology; Observations; Galaxies; Clusters
Additional Information: Workshop on Fundamental Physics with Cosmic Microwave Background Radiation
Publisher: Elsevier
ISSN: 1387-6473
Last Modified: 04 Jun 2017 06:26

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