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

Autor: Z. Ke, O. Steinkamp, C. Stegmann, M. Ouchrif, G. Evgrafov, W. Hulsbergen, T. Buran, B. Schmidt, C. Padilla, R. Eckmann, A. S. Schwarz, R. Wurth, Jinghui Yang, R. Pernack, A. Moshkin, Yunpeng Liu, Yu.T. Kiryushin, Dmitry Emeliyanov, S. Nowak, M. Walter, Z. Zhu, M. Beck, G. Medin, I. Golutvin, A. Lanyov, Z. Zheng, I. Vukotic, M. Capeans, S. Vassiliev, A. Petrukhin, G. Bohm, Hermann Kolanoski, K. Berkhan, R. Mankel, D. Pose, Marcus Hohlmann, R. Zimmermann, J. Ni, Y. Jia, U. Uwer, I. Siccama, E. Michel, S. Karabekyan, Y. Wang, H. Schröder, N. Tesch, Th.S. Bauer, H. Albrecht, H. Deckers, S. Somov, B.X. Chen, X. Dong, C. Jiang, A. Spiridonov, J.J. Wang, V. Souvorov, A. Schreiner, U. Schwanke, K. Höpfner, S. Solunin, D. Krücker, D. Vishnevsky, H. Kapitza, K. Smirnov, I. Tsakov, M. Bruinsma, T. Lohse
Rok vydání: 2007
Předmět:
Zdroj: Nuclear instruments & methods in physics research / A 576, 312-330 (2007). doi:10.1016/j.nima.2007.03.025
ISSN: 0168-9002
Popis: In this paper we describe the operation and performance of the HERA-B Outer Tracker, a 112674 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 30000 in an Ar/CF4/CO2 (65:30:5) 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 to 320 micrometers and the relative momentum resolution can be described as: sigma(p)/p (in %) = (1.61 +- 0.02) + (0.0051 +- 0.0006) p. At the end of the HERA-B running no aging effects in the Outer Tracker cells were observed.
Comment: 38 pages, 20 figures. v2: Added clarifications about trigger efficiency, momentum resolution and alignment precision. Corrected typos. Improved figure quality
Databáze: OpenAIRE