We describe the optical design and performance of 'QUEST and DASI' or 'QUaD', a ground-based high-resolution experiment designed to measure the polarisation properties of the cosmic microwave background radiation. QUaD uses bolometric detectors at 100 and 150 GHz on a 2.6 m Cassegrain telescope. The QUaD optics are designed to minimise systematic effects as well as to maximise sensitivity, and we report here on the comprehensive quasi-optical analysis used to achieve this design. We also present initial optical performance measurements achieved in operation, and discuss changes made to the optics to overcome some errors in the mechanical construction of the primary mirror. The QUaD experiment is now fully operational and taking world-leading data at the South Pole. © 2007 Elsevier B.V. All rights reserved.

The quasi-optical design of the QUaD telescope / O'Sullivan, C.; Cahill, G.; Murphy, J. A.; Gear, W. K.; Harris, J.; Ade, P. A. R.; Church, S. E.; Thompson, K. L.; Pryke, C.; Bock, J.; Bowden, M.; Brown, M. L.; Carlstrom, J. E.; Castro, P. G.; Culverhouse, T.; Friedman, R. B.; Ganga, K. M.; Haynes, V.; Hinderks, J. R.; Kovak, J.; Lange, A. E.; Leitch, E. M.; Mallie, O. E.; Melhuish, S. J.; Orlando, A.; Piccirillo, L.; Pisano, G.; Rajguru, N.; Rusholme, B. A.; Schwarz, R.; Taylor, A. N.; Wu, E. Y. S.; Zemcov, M.. - In: INFRARED PHYSICS & TECHNOLOGY. - ISSN 1350-4495. - 51:4(2008), pp. 277-286. [10.1016/j.infrared.2007.10.001]

The quasi-optical design of the QUaD telescope

Pisano G.;
2008

Abstract

We describe the optical design and performance of 'QUEST and DASI' or 'QUaD', a ground-based high-resolution experiment designed to measure the polarisation properties of the cosmic microwave background radiation. QUaD uses bolometric detectors at 100 and 150 GHz on a 2.6 m Cassegrain telescope. The QUaD optics are designed to minimise systematic effects as well as to maximise sensitivity, and we report here on the comprehensive quasi-optical analysis used to achieve this design. We also present initial optical performance measurements achieved in operation, and discuss changes made to the optics to overcome some errors in the mechanical construction of the primary mirror. The QUaD experiment is now fully operational and taking world-leading data at the South Pole. © 2007 Elsevier B.V. All rights reserved.
2008
Cosmic microwave background; Feedhorn design; Gaussian beam modes; Optical design; Quasioptics
01 Pubblicazione su rivista::01a Articolo in rivista
The quasi-optical design of the QUaD telescope / O'Sullivan, C.; Cahill, G.; Murphy, J. A.; Gear, W. K.; Harris, J.; Ade, P. A. R.; Church, S. E.; Thompson, K. L.; Pryke, C.; Bock, J.; Bowden, M.; Brown, M. L.; Carlstrom, J. E.; Castro, P. G.; Culverhouse, T.; Friedman, R. B.; Ganga, K. M.; Haynes, V.; Hinderks, J. R.; Kovak, J.; Lange, A. E.; Leitch, E. M.; Mallie, O. E.; Melhuish, S. J.; Orlando, A.; Piccirillo, L.; Pisano, G.; Rajguru, N.; Rusholme, B. A.; Schwarz, R.; Taylor, A. N.; Wu, E. Y. S.; Zemcov, M.. - In: INFRARED PHYSICS & TECHNOLOGY. - ISSN 1350-4495. - 51:4(2008), pp. 277-286. [10.1016/j.infrared.2007.10.001]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1557077
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