Abstract
A new method to detect neutron radiation based on an electro-optic Pockels cell is reported. Collimated laser light passes through a radiation-sensitive electro-optic Pockels cell crystal sandwiched between crossed polarizers and onto a light sensitive photodiode. As radiation interacts in the crystal, free charge carriers are generated and perturb the electric field in the crystal, thereby altering the light polarization and causing a change in light intensity passing through the Pockels cell/polarizer system. The device can detect a neutron flux as low as a few neutrons cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-2</sup> s <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> with an upper saturation limit exceeding 1010 neutrons cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-2</sup> s <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> . The unique electro-optic system separates the processing electronics from the detecting sensor, thereby allowing for operation in high neutron flux environments..
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