The HADES Tracking System

Müntz, C.; Markert, J.; Alvarez-Pol, H.; Badura, E.; Bielcik, J.; Bokemeyer, B.; Boyard, J.-L.; Chepurnov, V.; Chernenko, S.; Daues, H.; Dohrmann, F.; Enghardt, W.; Fateev, O.; Garabatos, C.; Glonti, L.; Grosse, E.; Hehner, J.; Heidel, K.; Hennino, T.; Hoffmann, J.; Ierusalimov, A.; Kämpfer, B.; Kanaki, K.; Koenig, W.; Kotte, R.; Naumann, L.; Ott, W.; Pachmayer, Y. C.; Pechenov, V.; Petrov, A.; Pouthas, J.; Ramstein, B.; Rosenkranz, K.; Rosier, P.; Roy-Stephan, M.; Rustamov, A.; Sadovsky, A.; Smykov, L.; Stelzer, H.; Stroebele, H.; Sudol, M.; Sturm, C.; Sobiella, M.; Stroth, J.; Wüstenfeld, J.; Zanevsky, Y.; Zumbruch, P.

The HADES Tracking System

Müntz, C.; Markert, J.; Alvarez-Pol, H.; Badura, E.; Bielcik, J.; Bokemeyer, B.; Boyard, J.-L.; Chepurnov, V.; Chernenko, S.; Daues, H.; Dohrmann, F.; Enghardt, W.; Fateev, O.; Garabatos, C.; Glonti, L.; Grosse, E.; Hehner, J.; Heidel, K.; Hennino, T.; Hoffmann, J.; Ierusalimov, A.; Kämpfer, B.; Kanaki, K.; Koenig, W.; Kotte, R.; Naumann, L.; Ott, W.; Pachmayer, Y. C.; Pechenov, V.; Petrov, A.; Pouthas, J.; Ramstein, B.; Rosenkranz, K.; Rosier, P.; Roy-Stephan, M.; Rustamov, A.; Sadovsky, A.; Smykov, L.; Stelzer, H.; Stroebele, H.; Sudol, M.; Sturm, C.; Sobiella, M.; Stroth, J.; Wüstenfeld, J.; Zanevsky, Y.; Zumbruch, P.

The HADES dielectron spectrometer has recently launched its physics program at the heavy ion synchrotron SIS at GSI Darmstadt. The spectroscopy of vector mesons in heavy ion collisions via their dielectron decay channels makes great demands on the HADES tracking system regarding acceptance and spatial resolution. It is formed out of 24 low-mass, trapezoidal multi-layer drift chambers providing about 30 m² of active area. Low multiple scattering in total four planes of drift chambers before and after the magnetic field is ensured by using Helium-based gas mixtures and aluminum cathode and field wires. First in-beam performance results will be contrasted with expectations from simulations. Emphasis is placed on the energy loss information, exploring its relevance regarding track recognition.

Nuclear Instruments and Methods in Physics Research Section A 535(2004)1-2, 242-246

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