The OPAL Poletip Hadron Calorimeters

The poletip hadron calorimeter complements the barrel and endcap ones by extending the solid angle coverage 0.91 < |cos(theta)| < 0.99. Here the gap between the iron plates, available for detectors, was reduced to 10 mm to avoid perturbing the magnetic field. In order to improve the energy resolution in the forward direction, where the momentum resolution of the central detector is falling off, the distance between samplings was reduced to 80 mm and the number of samplings increased to 10 (compared to 9 in the barrel and 8 in the endcap).

See also

OPAL calorimeters

The barrel and endcap hadron calorimeters