Electromagnetic design for SuperSpec: a lithographically-patterned millimetre-wave spectrograph

Creators: Barry, P. S.; Shirokoff, E.; Kovács, A.; Reck, T. J.; Hailey-Dunsheath, S.; McKenney, C. M.; Swenson, L. J.; Hollister, M. I.; Leduc, H. G.; Doyle, S.; O'Brient, R.; Llombart, N.; Marrone, D.; Chattopadhyay, G.; Day, P. K.; Padin, S.; Bradford, C. M.; Mauskopf, P. D.; Zmuidzinas, J.

Others:: Holland, Wayne S.; Zmuidzinas, Jonas

Abstract

SuperSpec is an innovative, fully planar, compact spectrograph for mm/sub-mm astronomy. SuperSpec is based on a superconducting filter-bank consisting of a series of planar half-wavelength filters to divide up the incoming, broadband radiation. The power in each filter is then coupled into titanium nitride lumped element kinetic inductance detectors, facilitating the read out of a large number of filter elements. We will present electromagnetic simulations of the different components that will make up an R = 700 prototype instrument. Based on these simulations, we discuss optimisation of the coupling between the antenna, transmission line, filters and detectors.

Additional Information

© 2012 SPIE. This work has been supported in part by a NASA grant through solicitation NNH10ZDA001N, task number 399131.02.06.03.43. P. S. Barry acknowledges the continuing support from the Science and Technology Facilities Council Ph.D studentship programme and grant programmes ST/G002711/1 and ST/J001449/1. E. Shirokoff, L. J. Swenson and C. M. McKenney acknowledge support from the W. M. Keck Institute for Space Studies. L. J. Swenson, M. I. Hollister and T. Reck acknowledge funding from NASA Postdoctoral Programme.

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