The Atacama Cosmology Telescope: the polarization-sensitive Actpol instrument
- Thornton, R. J.
- Ade, Peter
- Aiola, S.
- Angilè, F. E.
- Amiri, M.
- Beall, J. A.
- Becker, D. T.
- Cho, H-M.
- Choi, S. K.
- Corlies, P.
- Coughlin, K. P.
- Datta, R.
- Devlin, M. J.
- Dicker, S. R.
- Dünner, R.
- Fowler, J. W.
- Fox, A. E.
- Gallardo, P. A.
- Gao, J.
- Grace, E.
- Halpern, M.
- Hasselfield, M.
- Henderson, S. W.
- Hilton, G. C.
- Hincks, A. D.
- Ho, S. P.
- Hubmayr, J.
- Irwin, K. D.
- Klein, J.
- Koopman, B.
- Li, Dale
- Louis, T.
- Lungu, M.
- Maurin, L.
- McMahon, J.
- Munson, C. D.
- Naess, S.
- Nati, F.
- Newburgh, L.
- Nibarger, J.
- Niemack, M. D.
- Niraula, P.
- Nolta, M. R.
- Page, L. A.
- Pappas, C. G.
- Schillaci, A.
- Schmitt, B. L.
- Sehgal, N.
- Sievers, J. L.
- Simon, S. M.
- Staggs, S. T.
- Tucker, Carole
- Uehara, M.
- Lanen, J. van
- Ward, J. T.
- Wollack, E. J.
DOIAbstract
The Atacama Cosmology Telescope (ACT) makes high angular resolution measurements of anisotropies in the Cosmic Microwave Background (CMB) at millimeter wavelengths. We describe ACTPol, an upgraded receiver for ACT, which uses feedhorn-coupled, polarization-sensitive detector arrays, a 3° field of view, 100 mK cryogenics with continuous cooling, and meta material antireflection coatings. ACTPol comprises three arrays with separate cryogenic optics: two arrays at a central frequency of 148 GHz and one array operating simultaneously at both 97 GHz and 148 GHz. The combined instrument sensitivity, angular resolution, and sky coverage are optimized for measuring angular power spectra, clusters via the thermal Sunyaev–Zel'dovich (SZ) and kinetic ...
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