Editing OPAL
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==Detector Design== | ==Detector Design== | ||
− | The detector provides acceptance for Z<sup>0</sup> decays over 4 | + | The detector provides acceptance for Z<sup>0</sup> decays over <math>4\pi</math> in solid angle. The main detector components are a system of central tracking chambers inside a solenoidal field of 0.435 T, a time-of-flight counter, a lead glass electromagnetic calorimeter with a presampler, a hadron calorimeter in the form of an instrumented magnet return yoke, and an outer muon chamber. A forward calorimeter serves as a luminosity moniter. |
===Central Tracking Detector=== | ===Central Tracking Detector=== | ||
The Central Tracking Detector is divided into a precision vertex chamber, a large jet chamber, and a z chamber. | The Central Tracking Detector is divided into a precision vertex chamber, a large jet chamber, and a z chamber. | ||
− | The vertex detector is a cylindrical drift chamber that surrounds has a length of 1 m, an inner radius of 88 mm, and an outer radius of 235 mm. There are two layers of 36 cells each: an inner layer of axial wires and an outer layer of stereo cells. Both types of cells have radial wire planes consisting of 200 μm gold plated Cu-Be potential wires and 20 μm gold plated W-Rh andoe wires. In the axial cells, there are 12 anode wires with radial spacing of 5.3 mm. The stereo cells have 6 anode wires with a spacing of 5 mm with a stereo angle of 4 | + | The vertex detector is a cylindrical drift chamber that surrounds has a length of 1 m, an inner radius of 88 mm, and an outer radius of 235 mm. There are two layers of 36 cells each: an inner layer of axial wires and an outer layer of stereo cells. Both types of cells have radial wire planes consisting of 200 μm gold plated Cu-Be potential wires and 20 μm gold plated W-Rh andoe wires. In the axial cells, there are 12 anode wires with radial spacing of 5.3 mm. The stereo cells have 6 anode wires with a spacing of 5 mm with a stereo angle of 4 degrees. The cathode planes use 125 μm Cu-Be wires with a 1 mm spacing in both cells. In the r-φ plane, the vertex chamber provides a resolution of 55 μm. |
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===Time-of-Flight System=== | ===Time-of-Flight System=== |