Read out system for Drift Chamber using ASD chip

For make clear the strangeness photo-production process, $\gamma+n\rightarrow K^0+\Lambda$ ~reaction is very important. For research this reaction, we are now constructing Neutral Kaon Spectrometer. And in this spectrometer, we designed a large cylindrical Drift Chamber. Since the Drift Chamber is operated in a huge background from $\gamma \rightarrow e^+ e^-$ conversion, the integration time of an amplifier should be small. Therefore, we study a property of an ASD chip with the integration time of 16nsec(which has not been used for Drift Chamber). In this talk, I will talk about result of ASD chip research and the read out system of Drift Chamber.