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Green Bank Telescope Penn Array Project Leader at Penn

By Benjamin Werner and Dr. Simon Dicker


The Experimental Cosmology Group at the University Pennsylvania is finishing the development of a telescope receiver that will operate at 90 GHz, a frequency in the far infrared band. This receiver will be commissioned on the 100 meter Green Bank Telescope in West Virginia as one of a few receivers used for different radiation bands. The scientific interests that lie in observations at this frequency include looking at high red-shift galaxies and answering the question of how common solar systems like ours are in our galaxy. The detector that is being used in this band is a Transition Edge Sensor (TES), specifically a bolometer operating at 450 mK (or-272.7 degrees Celsius). Optics and filters within the receiver as well as the telescope mirrors themselves direct sources of 90GHz radiation to an array of bolometers, sensors that detect heat incident on their surface. This array has eight by nine pixel elements. All bolometers in the array are read using an electronics system (Mark III) developed by the National Institute of Standards and Technology (NIST) and modified by the National Aeronautics and Space Administration (NASA). Part of the electronics system and the bolometers themselves are kept within a cryostat designed and built by the Experimental Cosmology Group at Penn that cools to about 250 mK in a single chamber. The goal of this computer science engineering project was to design and implement algorithms that can be use

Year: 2005
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