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16 June 2006 The primordial anisotropy polarization pathfinder array (PAPPA): instrument overview and status
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PAPPA is a balloon-based experiment designed to measure the polarization of the Cosmic Microwave Background using candidate technology for an eventual Einstein Inflation Probe mission. It will survey a 20° × 20° patch of sky with 0.5° angular resolution covering 3 passbands centered at 89, 212 and 302 GHz. Detection will be accomplished via antenna-coupled transition edge sensors (TESs) with SQUID-based readouts. In the eventual flight package, band defining filters and MEMS-based polarization modulators will be incorporated into the superconducting microstrip transmission lines that terminate in resistors that are thermally coupled to the TESs. The MEMS switches will allow on-chip polarization modulation that is faster than significant detector gain variations. The initial configuration will incorporate a simplified focal plane augmented by quasioptical polarization modulation. We describe the overall instrument design and present a summary of the current progress.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. T. Chuss, A. Kogut, D. Fixsen, G F. Hinshaw, M. Limon, S. H. Moseley, N. Phillips, E. Sharp, E. J. Wollack, K. U-Yen, N. Cao, T. Stevenson, W. Hsieh, M. Devlin, S. Dicker, C. Semisch, S. Barker, and K. Irwin "The primordial anisotropy polarization pathfinder array (PAPPA): instrument overview and status", Proc. SPIE 6275, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy III, 62751J (16 June 2006);


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