Abstract

A parallel plate counter with a resistive anode and a two-dimensional readout is presented. The anode is made of a thin germanium layer with a sheet resistivity ⩾ 1 M ω/square and the cathode is made of aluminized mylar 5 μm thick. The anode is transparent to the fast impulse due to the collection of the multiplication electrons. A chessboard of “pads” placed behind the anode plane is used to obtain the positional information. The detector and the readout system are physically and logically separated. An overall spatial resolution of 70 μm (rms) for both coordinates has been measured.

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