The H1 silicon tracker

The H1 experiment at HERA is equipped with a silicon vertex detector, comprising a barrel part and two endcaps with disks. The barrel part uses double-sided, DC-coupled strip sensors, whereas the endcap parts use two types of wedge-shaped sensors, both single-sided and AC-coupled: u / v sensors have strips parallel to one edge of the sensor, r sensors have circular strips. Additional pad detectors provide fast triggering signals in the backward part.