X-Ray Detector for Dynamic Diffraction Studies

Abstract
A scintillation detector system is described which can be used for dynamic diffraction studies. This system contains several individual channels with each channel (consisting of a scintillator, light pipe, and photomultiplier tube) positioned at a unique 2θ position; thus, measurement of diffracted intensity vs 2θ can be made. Signal‐to‐background ratio for the (200) reflection of powdered LiF using copper radiation was measured to be 3.0. Angular resolution depends upon the scintillator size and proximity to the x‐ray source. For a four‐channel system used in x‐ray diffraction studies of material undergoing shock wave compression [Q. Johnson, A. Mitchell, R. Keeler, and L. Evans, Phys. Rev. Lett. 25, 1099 (1970)] angular resolution was about 1° in 2θ. This resolution can be increased by methods which increase signal strength.

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