The AMY inner tracking chamber

We have constructed and operated a pressurized "tube-style" charged particle tracking detector, the inner tracking chamber, for the AMY experiment at the TRISTAN e ⁺e ^- storage ring. The AMY inner tracking chamber consists of a four layer, 144 cell per layer "tube-style" drift chamber system. It occupies the region between the beam pipe and the AMY central drift chamber. An overall spatial resolution of 80 μm per layer has been obtained during the first two years of operation using argon-ethane gas at 1.45 bar for Bhabha scattering events. This article describes the design, construction, and operation of the device.