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    The quasi-optical design of the QUaD telescope


    O'Sullivan, Créidhe and Cahill, G. and Murphy, J.Anthony and Gear, W.K. and Harris, J. and Ade, P.A.R. and Church, S.E. and Thompson, K.L. and Pryke, C. and Bock, J. and Bowden, M. and Brown, M.L. and Carlstrom, J.E. and Castro, P.G. and Culverhouse, T. and Friedman, R.B. and Ganga, K.M. and Haynes, V. and Hinderks, J.R. and Kovak, J. and Lange, A.E. and Leitch, E.M. and Mallie, O.E. and Melhuish, S.J. and Orlando, A. and Piccirillo, L. and Pisano, G. and Rajguru, N. and Rusholme, B. and Schwarz, R. and Taylor, A.N. and Wu, E.Y.S. and Zemcov, M. (2008) The quasi-optical design of the QUaD telescope. Infrared Physics & Technology, 51. pp. 277-286. ISSN 1350-4495

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    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.

    Item Type: Article
    Keywords: Quasioptics; Gaussian beam modes; Optical design; Feedhorn design; Cosmic microwave background;
    Academic Unit: Faculty of Science and Engineering > Experimental Physics
    Item ID: 10990
    Identification Number: https://doi.org/10.1016/j.infrared.2007.10.001
    Depositing User: Dr. Créidhe O'Sullivan
    Date Deposited: 23 Aug 2019 14:39
    Journal or Publication Title: Infrared Physics & Technology
    Publisher: Elsevier
    Refereed: Yes
    URI:

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