Stereo detection circuit for detecting neutrons

A neutron detector circuit for a neutron detector, comprising:

• a scintillator having a plurality of wavelength shifting optical fibers, wherein a first set of wavelength shifting optical fibers are connected with a first input of at least one photomultiplier tube (“PMT”) and a second set of wavelength shifting optical fibers are connected with a second input of said at least one PMT;
• a first comparator circuit connected with a first PMT output and a second comparator connected with a second PMT output;
• a first logic algorithm circuit configured to generate a first logic algorithm output and a second logic algorithm output in response to a first output pulse received from said first comparator;
• a second logic algorithm circuit configured to generate a third logic algorithm output and a fourth logic algorithm output in response to a second output pulse received from said second comparator;
• and
• a coincidence detection circuit connected configured to be connected with said first, second, third, and fourth logic algorithm outputs, wherein said coincidence detection circuit is configured to generate a neutron event output pulse if output pulses are received on said first and third logic algorithm outputs or said second and fourth logic algorithm outputs.

A neutron detection circuit for a neutron detector, comprising:

• a scintillator having a plurality of wavelength shifting optical fibers, wherein a first set of wavelength shifting optical fibers are connected with a first input of at least one photomultiplier tube (“PMT”) and a second set of wavelength shifting optical fibers are connected with a second input of said at least one PMT;
• a first comparator connected with a first PMT output of said at least one PMT;
• a second comparator connected with a second PMT output of said at least one PMT;
• a first multivibrator connected with a first comparator output of said first comparator;
• a second multivibrator connected with said first comparator output of said first comparator;
• a third multivibrator connected with a second comparator output of said second comparator;
• a fourth multivibrator connected with said second comparator output of said second comparator;
• a first counter connected with a first multivibrator output of said first multivibrator, wherein a second multivibrator output of said second multivibrator is connected with said first counter, wherein said first multivibrator output is connected with a first enable input of said first counter and said second multivibrator output is connected with a first count input of said first counter;
• a second counter connected with a third multivibrator output of said third multivibrator, wherein said fourth multivibrator output of said fourth multivibrator is connected with a second enable input of said second counter and said fourth multivibrator output is connected with a second count input of said second counter;
• and
• a first AND gate and a second AND gate, wherein a first counter output of said first counter is connected with said first AND gate, a second counter output of said first counter is connected with said second AND gate, a third counter output of said second counter is connected with said first AND gate, a fourth counter output of said second counter is connected with said second AND gate, wherein said first AND gate is configured to generate a neutron event output pulse if output pulses are received from said first and third counter outputs and said second AND gate is configured to generate said neutron event output pulse if output pulses are received from said second and fourth counter outputs.