Performance of the ALEPH Time Projection Chamber

W. B. Atwood, T. Barczewski, L. A.T. Bauerdick, L. Bellantoni, E. Blucher, W. Blum, J. Boudreau, O. Boyle, D. Cinabro, J. Conway, G. Cowan, D. F. Cowen, I. Efthymiopoulos, P. Faure, Z. Feng, F. Fidecaro, B. Gobbo, A. W. Halley, S. Haywood, A. JahnR. C. Jared, R. P. Johnson, M. Kasemann, K. Kleinknecht, B. Leclaire, I. Lehraus, B. Lofstedt, T. Lohse, D. Lueke, A. Lusiani, P. S. Marrocchesi, J. May, T. C. Meyer, F. Morsani, A. Minten, J. Pater, D. Pollmann, M. Price, R. Richter, W. Richter, S. Roehn, L. Rolandi, A. Roth, H. Rotscheidt, D. Schlatter, M. Schmelling, H. Schmidt, J. Schroeder, R. Settles, F. Steeg, G. Stefanini, U. Stierlin, M. Takashima, W. Tejessy, I. Ten Have, J. Thomas, A. Vayaki, J. Wear, W. Wiedenmann, W. Witzeling, Lan Wu Sau Lan Wu

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55 Scopus citations


The performance of the ALEPH Time Projection Chamber (TPC) has been studied using data taken during the LEP running periods in 1989 and 1990. After correction of residual distortions and optimisation of coordinate reconstruction algorithms, single coordinate resolutions of 173 μm in the azimuthal and 740 μm in the longitudinal direction are achieved. This results in a momentum resolution for the TPC of Δp/p2 = 1.2 × 10-3 (GeV/c)-1. In combination with the ALEPH Inner Tracking Chamber (ITC), a total momentum resolution of Δp/p2 = 0.8 × 10-3 (GeV/c)-1 is obtained. With respect to particle identification, the detector achieves a resolution of 4.4% for the measurement of the ionisation energy loss.

Original languageEnglish (US)
Pages (from-to)446-458
Number of pages13
JournalNuclear Inst. and Methods in Physics Research, A
Issue number3
StatePublished - Sep 1 1991

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation


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