Abstract:

An anode-cathode array is being developed for electron multiplication in gas that lends itself to easy fabrication with lithographic techniques. Comprising an assembly of anode pins that are recessed into a closely-packed hexagonal cathode, the MIcro-Pin Array (MIPA) represents a promising addition to micro-pattern detectors with two-dimensional sensitivity. We describe the electrostatic rationale behind the MIPA detector's design, the fabrication technique, and X-ray results that illustrate electrical stability and high rate capability.