Author/Authors :
Adinolfi، نويسنده , , M and Aloisio، نويسنده , , A and Ambrosino، نويسنده , , F and Andryakov، نويسنده , , A and Antonelli، نويسنده , , A and Antonelli، نويسنده , , M and Anulli، نويسنده , , F and Bacci، نويسنده , , C and Bankamp، نويسنده , , A and Barbiellini، نويسنده , , G and Bellini، نويسنده , , F and Bencivenni، نويسنده , , G and Bertolucci، نويسنده , , S and Bini، نويسنده , , C and Bloise، نويسنده , , C and Bocci، نويسنده , , V and Bossi، نويسنده ,
Abstract :
The main goal of the KLOE experiment at the Frascati DAΦNE φ−factory is the study CP violation in kaon decays. The tracking device of the experiment is a drift chamber whose dimensions, 4 m of diameter and 3.3 m length, provide a large acceptance volume for the decay products of low momentum KL (λL=3.4 m). A complete stereo geometry with 12.582 cells arranged in 58 layers guarantees a high and uniform efficiency in the reconstruction of the charged KL decays. Very light materials have been chosen both for the drift medium, a helium-based gas mixture, and for the mechanical structure, made of carbon fiber, to minimize multiple scattering and conversion of low-energy photons. The design requirements, the adopted solutions together with the calibration procedure and the tracking performances of the drift chamber are discussed.
