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12 September 2012 A new, fast, data acquisition system for the NPOI
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A new hardware system is being implemented at The Navy Precision Optical Interferometer (NPOI) to vastly increase the data recording capabilities of the observatory. NPOI has three spectrographs each with 32 channels ranging the visible spectrum. Siderostat path lengths are modulated at 500 Hz strokes to create fringe patterns. The new system will be able to record and use all of the data generated, unlike the existing system. Utilizing parallel architecture of FPGA‟s, all channels are processed simultaneously and piped to a host computer via DMA such that an entire stroke‟s data is made available before the start of the next stroke. This is expected to increase the amount of scientific data from the NPOI by an order of magnitude over the current system. Furthermore, this data can also be used to provide feedback to the delay lines to close the fringe tracking loop. In this paper we discuss the hardware and software components of the new system and current progress.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Matthew F. D. Brown, A. M. Jorgensen, T. Buschmann, D. J. Hutter, and J. T. Armstrong "A new, fast, data acquisition system for the NPOI", Proc. SPIE 8445, Optical and Infrared Interferometry III, 844530 (12 September 2012);


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