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Physics  2013 

Improved Particle Identification Using Cluster Counting in a Full-Length Drift Chamber Prototype

DOI: 10.1016/j.nima.2013.09.028

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Abstract:

Single-cell prototype drift chambers were built at TRIUMF and tested with a $\sim\unit[210]{MeV/c}$ beam of positrons, muons, and pions. A cluster-counting technique is implemented which improves the ability to distinguish muons and pions when combined with a traditional truncated-mean charge measurement. Several cluster-counting algorithms and equipment variations are tested, all showing significant improvement when combined with the traditional method. The results show that cluster counting is a feasible option for any particle physics experiment using drift chambers for particle identification. The technique does not require electronics with an overly high sampling rate. Optimal results are found with a signal smoothing time of $\sim\unit[5]{ns}$ corresponding to a $\sim\unit[100]{MHz}$ Nyquist frequency.

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