Abstract
Many nuclear physics experiments require cryogenic or high-pressure gas targets with thin windows. To obtain the best data, that is, to reduce background signals, a target window would ideally have zero thickness and zero deflexion. Since this is not possible a trade-off is made among target geometry, window geometry, window material, and window thickness. Measurements of deflexions of a variety of window materials and geometries were performed at room temperature and in liquid nitrogen to aid window design in the future. A simple graphical method for predicting the rupture pressure for several typical window materials is described. The results of the deflexion measurements are compared to a finite element computer programme Membran which predicts window deflexion and material stresses for a uniform applied pressure.
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