dorsal/arxiv
View SchemaThe Outer Tracker Detector of the HERA-B Experiment Part I: Detector
| Authors | H. Albrecht |
|---|---|
| Categories | |
| ArXiv ID | physics/0507048 |
| URL | https://arxiv.org/abs/physics/0507048 |
| DOI | 10.1016/j.nima.2005.09.043 |
Abstract
The HERA-B Outer Tracker is a large system of planar drift chambers with about 113000 read-out channels. Its inner part has been designed to be exposed to a particle flux of up to 2.10^5 cm^-2 s^-1, thus coping with conditions similar to those expected for future hadron collider experiments. 13 superlayers, each consisting of two individual chambers, have been assembled and installed in the experiment. The stereo layers inside each chamber are composed of honeycomb drift tube modules with 5 and 10 mm diameter cells. Chamber aging is prevented by coating the cathode foils with thin layers of copper and gold, together with a proper drift gas choice. Longitudinal wire segmentation is used to limit the occupancy in the most irradiated detector regions to about 20 %. The production of 978 modules was distributed among six different laboratories and took 15 months. For all materials in the fiducial region of the detector good compromises of stability versus thickness were found. A closed-loop gas system supplies the Ar/CF4/CO2 gas mixture to all chambers. The successful operation of the HERA-B Outer Tracker shows that a large tracker can be efficiently built and safely operated under huge radiation load at a hadron collider.
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"abstract": "The HERA-B Outer Tracker is a large system of planar drift chambers with\nabout 113000 read-out channels. Its inner part has been designed to be exposed\nto a particle flux of up to 2.10^5 cm^-2 s^-1, thus coping with conditions\nsimilar to those expected for future hadron collider experiments. 13\nsuperlayers, each consisting of two individual chambers, have been assembled\nand installed in the experiment. The stereo layers inside each chamber are\ncomposed of honeycomb drift tube modules with 5 and 10 mm diameter cells.\nChamber aging is prevented by coating the cathode foils with thin layers of\ncopper and gold, together with a proper drift gas choice. Longitudinal wire\nsegmentation is used to limit the occupancy in the most irradiated detector\nregions to about 20 %. The production of 978 modules was distributed among six\ndifferent laboratories and took 15 months. For all materials in the fiducial\nregion of the detector good compromises of stability versus thickness were\nfound. A closed-loop gas system supplies the Ar/CF4/CO2 gas mixture to all\nchambers. The successful operation of the HERA-B Outer Tracker shows that a\nlarge tracker can be efficiently built and safely operated under huge radiation\nload at a hadron collider.",
"arxiv_id": "physics/0507048",
"authors": [
"H. Albrecht"
],
"categories": [
"physics.ins-det"
],
"doi": "10.1016/j.nima.2005.09.043",
"title": "The Outer Tracker Detector of the HERA-B Experiment Part I: Detector",
"url": "https://arxiv.org/abs/physics/0507048"
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