Central Z Chamber (CZ)

The Central Z subdetector [19] surrounds CJ and makes precise measurements of the Z position of a particle's track as it exits CJ. CZ is made up of 24 chambers each of which is 4 m long, 500 mm wide and 59 mm thick. Each chamber is divided into 8 cells along the $z$-direction, each cell contains 6 sense wires lying perpendicular to the $z$-direction.

CZ covers a polar angle range of $44^{\circ}<\theta<136^{\circ}$. Its resolution is 300 $\mu$m in $z$ and 1.5 cm in $r-\phi$.