Aluminum is commonly used as vacuum separation foil in neutron guides and detectors. Due to its low surface potential neutrons with angular velocities down to 3m/s are passing the foil. However, according to Steyerl [1] neutron transmission is also affected by the surface roughness of the passed foil. The transmission decreases towards slow neutrons with […]
At setups which are on one side and at room temperature and on the other end cooled down by a cry head to almost zero kelvin (-273°C) a huge thermal gradient is given. Therefore, thermal contraction of the connecting part made of steel or any other material might lead high shear stresses at the cold […]
In this blog our project on designing and stress simulation of a ultra high vacuum chamber for 3D sputtering with outer dimensions of 1800x600x600mm will be described shortly
A commonly used material for UCN guiding is stainless steel ISO 1.4401 and 1.4404, due to its non magnetic, high stress resistance, availability and quite high neutron optical potential. Reducing losses and to minimize non-specular reflection they are highly polished to very low roughness far below the guided neutrons wavelength reaching a average transimission of […]