The quasi-optical design of the QUaD telescope

C. O'Sullivan; G. Cahill; J. A. Murphy; W. K. Gear; J. Harris; P. A R Ade; S. E. Church; K. L. Thompson; C. Pryke; J. Bock; M. Bowden; M. L. Brown; J. E. Carlstrom; P. G. Castro; T. Culverhouse; R. B. Friedman; K. M. Ganga; V. Haynes; J. R. Hinderks; J. Kovak; A. E. Lange; E. M. Leitch; O. E. Mallie; S. J. Melhuish; A. Orlando; L. Piccirillo; G. Pisano; N. Rajguru; B. A. Rusholme; R. Schwarz; A. N. Taylor; E. Y S Wu; M. Zemcov

doi:10.1016/j.infrared.2007.10.001

The quasi-optical design of the QUaD telescope

C. O'Sullivan, G. Cahill, J. A. Murphy, W. K. Gear, J. Harris, P. A R Ade, S. E. Church, K. L. Thompson, C. Pryke, J. Bock, M. Bowden, M. L. Brown, J. E. Carlstrom, P. G. Castro, T. Culverhouse, R. B. Friedman, K. M. Ganga, V. Haynes, J. R. Hinderks, J. KovakA. E. Lange, E. M. Leitch, O. E. Mallie, S. J. Melhuish, A. Orlando, L. Piccirillo, G. Pisano, N. Rajguru, B. A. Rusholme, R. Schwarz, A. N. Taylor, E. Y S Wu, M. Zemcov

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

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.

Original language	English (US)
Pages (from-to)	277-286
Number of pages	10
Journal	Infrared Physics and Technology
Volume	51
Issue number	4
DOIs	https://doi.org/10.1016/j.infrared.2007.10.001
State	Published - Mar 2008

Bibliographical note

Funding Information:
We would like to thank NUI Maynooth and Science Foundation Ireland for supporting this work financially. The QUaD instrument is funded by the National Science Foundation (USA) and the Particle Physics and Astronomy Research Council (UK).

Keywords

Cosmic microwave background
Feedhorn design
Gaussian beam modes
Optical design
Quasioptics

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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., ... Zemcov, M. (2008). The quasi-optical design of the QUaD telescope. Infrared Physics and Technology, 51(4), 277-286. https://doi.org/10.1016/j.infrared.2007.10.001

O'Sullivan, C, Cahill, G, Murphy, JA, Gear, WK, Harris, J, Ade, PAR, Church, SE, Thompson, KL, Pryke, C, Bock, J, Bowden, M, Brown, ML, Carlstrom, JE, Castro, PG, Culverhouse, T, Friedman, RB, Ganga, KM, Haynes, V, Hinderks, JR, Kovak, J, Lange, AE, Leitch, EM, Mallie, OE, Melhuish, SJ, Orlando, A, Piccirillo, L, Pisano, G, Rajguru, N, Rusholme, BA, Schwarz, R, Taylor, AN, Wu, EYS & Zemcov, M 2008, 'The quasi-optical design of the QUaD telescope', Infrared Physics and Technology, vol. 51, no. 4, pp. 277-286. https://doi.org/10.1016/j.infrared.2007.10.001

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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.",

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author = "C. O'Sullivan and G. Cahill and Murphy, {J. A.} and Gear, {W. K.} and J. Harris and Ade, {P. A R} and Church, {S. E.} and Thompson, {K. L.} and C. Pryke and J. Bock and M. Bowden and Brown, {M. L.} and Carlstrom, {J. E.} and Castro, {P. G.} and T. Culverhouse and Friedman, {R. B.} and Ganga, {K. M.} and V. Haynes and Hinderks, {J. R.} and J. Kovak and Lange, {A. E.} and Leitch, {E. M.} and Mallie, {O. E.} and Melhuish, {S. J.} and A. Orlando and L. Piccirillo and G. Pisano and N. Rajguru and Rusholme, {B. A.} and R. Schwarz and Taylor, {A. N.} and Wu, {E. Y S} and M. Zemcov",

note = "Funding Information: We would like to thank NUI Maynooth and Science Foundation Ireland for supporting this work financially. The QUaD instrument is funded by the National Science Foundation (USA) and the Particle Physics and Astronomy Research Council (UK).",

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AU - Cahill, G.

AU - Murphy, J. A.

AU - Gear, W. K.

AU - Harris, J.

AU - Ade, P. A R

AU - Church, S. E.

AU - Thompson, K. L.

AU - Pryke, C.

AU - Bock, J.

AU - Bowden, M.

AU - Brown, M. L.

AU - Carlstrom, J. E.

AU - Castro, P. G.

AU - Culverhouse, T.

AU - Friedman, R. B.

AU - Ganga, K. M.

AU - Haynes, V.

AU - Hinderks, J. R.

AU - Kovak, J.

AU - Lange, A. E.

AU - Leitch, E. M.

AU - Mallie, O. E.

AU - Melhuish, S. J.

AU - Orlando, A.

AU - Piccirillo, L.

AU - Pisano, G.

AU - Rajguru, N.

AU - Rusholme, B. A.

AU - Schwarz, R.

AU - Taylor, A. N.

AU - Wu, E. Y S

AU - Zemcov, M.

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N2 - 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.

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The quasi-optical design of the QUaD telescope

Abstract

Bibliographical note

Keywords

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