A Beam-Forming Receiver for the GBT at 23 GHz

We propose to support the design, construction and commissioning of a K-band (18-26 GHz) phased array feed receiver/beam-former, able to form 225 beams (i.e. a 225 pixel spectroscopic camera) for the 100m diameter Green Bank Telescope. This instrument will greatly enhance capabilities in the study of star formation, astrochemistry and other fields.