High Accuracy Parallel Foil Drift Chamber

A 50 × 50 cm2 area 1 cm drift spacing High Accuracy Parallel Foil Drift Chamber was built and successfully operated.1 This chamber produces an overall average spatial resolution σ = 80μm in the entire drift space. This type of drift chamber has excellent field unifonmity in the electron drift region, high count rate capability and relatively small memory time, 192 nsec.