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 language | English |
|---|---|
| Pages (from-to) | 312-330 |
| Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
| Volume | 576 |
| Issue number | 2-3 |
| DOIs | |
| Publication status | Published - 21 Jun 2007 |
| Externally published | Yes |
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