Electric Field and Drift Characteristics Studies for the Multiwire Chambers of the Third Plane of HADES
Electric Field and Drift Characteristics Studies for the Multiwire Chambers of the Third Plane of HADES
Kanaki, K.; (Editor)
Aim of this report is the investigation of suitable operational conditions for the drif{}t chambers MDC III installed in the HADES setup. The simulations performed showed that operating the drif{}t chambers in a mode with nearly constant electron drif{}t velocity in a predominant part of the cell allows a more precise and fast tracking. This is particularly important for electrons and positrons; here the invariant dilepton mass must be reconstructed with high precision to get a resolution of $\Delta M/M\approx 1\%$ for the $\omega$ and $\phi$ mass peaks and thus a chance to verify also small in-medium mass shif{}ts. This helps to realize the physics program at HADES which focuses on the search for such mass shif{}ts to get insight into the in-medium behaviour of hadrons in dense strongly interacting matter.
Keywords: drift cell; drift chamber; drift velocity; equipotential contours; Garfield simulations; HADES; isochrones; Opera simulations
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Wissenschaftlich-Technische Berichte / Forschungszentrum Rossendorf; FZR-365 Januar 2003
ISSN: 1437-322X
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Permalink: https://www.hzdr.de/publications/Publ-5226