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Data Acquisition for the New Muon $g$-$2$ Experiment at Fermilab

13 Apr 2015, 15:15
Village Center (Village Center)

Village Center

Village Center

oral presentation Track1: Online computing Track 1 Session


Wesley Gohn (U)


A new measurement of the anomalous magnetic moment of the muon, $a_{\mu} \equiv (g-2)/2$, will be performed at the Fermi National Accelerator Laboratory. The most recent measurement, performed at Brookhaven National Laboratory and completed in 2001, shows a 3.3-3.6 standard deviation discrepancy with the standard model value of $g$-$2$. The new measurement will accumulate 20 times those statistics, measuring $g$-$2$ to 0.14 ppm and improving the uncertainty by a factor of 4 over that of the previous measurement. The data acquisition system for this experiment must have the ability to create deadtime-free records from 700 $\mu$s muon spills at a raw data rate 18 GB per second. Data will be collected using 1296 channels of $\mu$TCA-based 800 MSPS, 12 bit waveform digitizers and processed in a layered array of networked commodity processors with 24 GPUs working in parallel to perform a fast recording of the muon decays during the spill. The system will be controlled using the MIDAS data acquisition software package. The described data acquisition system is currently being constructed, and will be fully operational before the start of the experiment in 2016.

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