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Paper detail

Fast DAQ system with image rejection for axion dark matter searches

A fast data acquisition (DAQ) system for axion dark matter searches utilizing a microwave resonant cavity, also known as axion haloscope searches, has been developed with a two-channel digitizer that can sample 16-bit amplitudes at rates up to 180 MSamples/s. First, we realized a practical DAQ efficiency of greater than 99% for a single DAQ channel, where the DAQ process includes the online fast Fourier transforms (FFTs). Using an IQ mixer and two parallel DAQ channels, we then also implemented a software-based image rejection without losing the DAQ efficiency. This work extends our continuing effort to improve the figure of merit in axion haloscope searches, the scanning rate.

preprint2022arXivOpen access
S. AhnM. J. LeeA. K. YiB. YeoB. R. KoY. K. Semertzidis
hep-exphysics.ins-det
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S. AhnM. J. LeeA. K. YiB. YeoB. R. KoY. K. Semertzidis

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