The KLOE drift chamber is a cylinder of ~2m radius and ~3.3m long, providing an adequate path for KL decays. The tracking volume is surrounded by a 15X0 em calorimeter and a superconducting coil providing a 0.6T field. Spherical end walls hold the tension of ~50000 wires, with good trasparency, Š0.1X0, to photons from p0 decays. Alternating stereo wires only, with constant radial displacement at the center, provide a uniform filling with approximately square cells. A He-iC4H10 gas mixture and Al field wires are used to minimize multiple scattering. The chamber point resolution in r, f is significantly better than 200mm resulting in a KL�p+p- vertex accuracy of sx,y(z)Š0.5(1-2)mm. The K0 mass resolution is sM~1MeV/c2.
Calcaterra A. (Tue,) studied this question.