The outer tracker detector of the HERA-B experiment. Part III: Operation and performance

H. Albrecht, T.S. Bauer, M. Beck, K. Berkhan, G. Bohm, M. Bruinsma, T. Buran, M. Capeáns, B.X. Chen, H. Deckers, X. Dong, R. Eckmann, D. Emeliyanov, G. Evgrafov, I. Golutvin, M. Hohlmann, K. Höpfner, W. Hulsbergen, Y. Jia, C. JiangH. Kapitza, S. Karabekyan, Z. Ke, Yu. Kiryushin, H. Kolanoski, D. Krücker, A. Lanyov, Y.Q. Liu, T. Lohse, R. Mankel, G. Medin, E. Michel, A. Moshkin, J. Ni, S. Nowak, M. Ouchrif, C. Padilla, R. Pernack, A. Petrukhin, D. Pose, B. Schmidt, A. Schreiner, H. Schröder, U. Schwanke, A.S. Schwarz, I. Siccama, K. Smirnov, S. Solunin, S. Somov, V. Souvorov, A. Spiridonov, C. Stegmann, O. Steinkamp, N. Tesch, I. Tsakov, U. Uwer, S. Vassiliev, D. Vishnevsky, I. Vukotić, M. Walter, J.J. Wang, Y.M. Wang, R. Wurth, J. Yang, Z. Zheng, Z. Zhu, R. Zimmermann

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

In this paper we describe the operation and performance of the HERA-B Outer Tracker, a 112 674 channel system of planar drift tube layers. The performance of the HERA-B Outer Tracker system fullfilled all requirements for stable and efficient operation in a hadronic environment, thus confirming the adequacy of the honeycomb drift tube technology and of the front-end readout system. The detector was stably operated with a gas gain of 3 × 104 in an Ar / CF4 / CO2 (65:35:5) gas mixture, yielding a good efficiency for triggering and track reconstruction, larger than 95% for tracks with momenta above 5 GeV / c. The hit resolution of the drift cells was 300-320 μ m and the relative momentum resolution can be described as: σ (p) / p [%] = (1.61 ± 0.02) + (0.0051 ± 0.0006) · p [GeV / c]. At the end of the HERA-B running no aging effects in the Outer Tracker cells were observed. © 2007 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)312-330
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume576
Issue number2-3
DOIs
Publication statusPublished - 21 Jun 2007
Externally publishedYes

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