The DNX-detector is a two-dimensional spatial sensitive Multi-Wire-Proportional-Counter.
Strong and nearly homogeneous electric fields (red arrows) will be generated between
the electrodes caused by applied voltages. If, for example, a neutron
will be absorbed in the detection volume, the electrons released by ionisation, will be accelerated towards the anode (blue arrows).
The charge impact originated by an electron avalanche on the anode will influence
two electric impulses (green arrows)in both cathode wires (X and Y cathode).
Each delayline will split the input impulse in two equally strong pulses.
The latter flow out at both ends of the delayline. The delaylines consist of an array of LC elements which
lead to a delaytime of about 2.7 ns for both pulses between two adjacent cathode wires.
The more the distance from an end of a delayline an impulse is generated, the more the time is required,
until it is observed at this end of the delayline. Finally, the arrival times of both impulses
lead to the detection point in X and Y direction.
Fig.1: Principle of the spatial recognition in 2D-Multi-Wire Proportional Detector with delay management