Considerations for the Design of a Time Projection Liquid Argon Ionization Chamber

Basic concepts of electrode geometry and signal processing for a time projection liquid argon ionization chamber are introduced. The design criteria of a system of sensing electrodes are discussed. The signals induced by rectilinear particle tracks on the sensing electrodes are calculated by means of a detailed study of possible electric field configurations. Suitable signal processing filters are designed in order to achieve nearly equal position resolution in the three space coordinates. The electronic noise limits the position resolution of a single track to a few tenths of a millimeter and the capability to resolve and measure closely spaced multiple tracks to a few millimeters.