The DELPHI high-density projection chamber

The mechanical design (converter, readout chamber, and trigger counters) and electronics (analog components and digitizers) of the High-Density Projection Chamber are described. Results from tests of production modules both in a test beam. showing observed change as a function of incident energy and observed versus expected track location, are presented. Tests using cosmic rays, showing measured drift-velocity and attenuation length for each pad row, are also presented.<
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