W0185

A Compact High Resolution 2-D Position Sensitive Neutron Detector. Patrick M. De Lurgio, Istvan Naday, Argonne National Laboratory, 9700 South Cass Ave., Argonne, IL 60561, USA.

A new 2-dimensional Position Sensitive Neutron Detector (PSND), with an active area of 15 x 15 cm², has been developed at Argonne National Laboratory (ANL) for use on the Single Crystal Diffractometer at the Intense Pulsed Neutron Source at ANL and for possible use at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. The detector is based on the well-proven Anger camera technique employing a ⁶Li glass scintillator as the neutron converter. This PSND incorporates optimized optics and small-pitch photomultiplier tubes (PMTs) to achieve average resolutions of less than 2 mm FWHM. The detector read-out is handled by individual electronics for each PMT and the position is determined by a real-time microprocessor. The enclosure for the detector is optimized to allow multiple detectors to be tiled with minimum dead space between them. Thus the detector provides a high resolution at a relatively low cost making the design ideal for detector arrays.