Central Drift Chamber for Rare Kaon Decay Spectrometer

Design of the central drift chamber for BNL experiment 787 and measurement of the decay K+→μ+𝑣v‾ are discussed. A jet chamber type cell with 6 sense wires and no interspersed field wires has been designed to achieve good spatial resolution and efficiency in a 1 T magnetic field. Results of the testing of a prototype chamber are presented.