18 July 2008 Modeling the quasi-optical performance of CMB astronomical interferometers
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Abstract
The Millimeter-Wave Bolometric Interferometer (MBI) is a ground-based instrument designed to measure the polarization anisotropies of the Cosmic Microwave Background (CMB) and contains a number of quasi-optical components, including a complex back-to-back system of corrugated feed-horn antennas. In this paper we use MBI as an example to demonstrate the existing modeling techniques and as a focus to develop extended modeling capabilities. The software we use to model this system targets the millimeter and sub-millimeter region of the electromagnetic spectrum and has been extended to efficiently model the performance of back-to-back corrugated horns embedded in larger optical systems. This allows the calculation of the coupling of radiation from the sky to the detector array through a back-to-back horn feed system.
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Gareth S. Curran, Gareth S. Curran, Marcin L. Gradziel, Marcin L. Gradziel, Créidhe O'Sullivan, Créidhe O'Sullivan, J. Anthony Murphy, J. Anthony Murphy, Andrei Korotkov, Andrei Korotkov, Siddharth Malu, Siddharth Malu, Peter Timbie, Peter Timbie, Gregory Tucker, Gregory Tucker, } "Modeling the quasi-optical performance of CMB astronomical interferometers", Proc. SPIE 7020, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV, 70202O (18 July 2008); doi: 10.1117/12.790500; https://doi.org/10.1117/12.790500
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