Sup 10]B thin film based position sensitive neutron detector

Abstract

With the global crisis of He3, it is essential to explore the use of other alternatives as BF3 and boron coated detectors, particularly for neutron scattering applications. Performance of BF3 filled position sensitive detectors (PSD) is evaluated, mentioned elsewhere and novel designs are being tried for gain in efficiency. Whereas performance of boron film based detectors for use as PSD is being presently evaluated. Though efficiency of 10B film detector in equivalent dimensions is lower than that with BF3, main advantage of 10B film detectors is its non-toxic nature. A boron film based PSD in coaxial geometry is developed with 10B (90%enriched) coating thickness of 1 mg/cm2 on inner lining of cathode. Detailed characterization of a PSD is essential for further designs of large area PSD. Present PSD is evaluated for the pulse height, plateau characteristics, uniformity of coating thickness and position resolution. The position resolution improves with higher gas pressure, whereas multiple layers are essential to gain efficiency. Results from these characterizations of the PSD are presented.