Overflowing cylinder for neutron reflection research at expanding surfaces

An overflowing cylinder (OFC) suitable for neutron reflection (NR) was desi gned to combine the both techniques. The two main requirements for the desi gn are; firstly, the expanding surface dimensions should be large enough to perform NR, secondly, the vertical dimensions should be minimized because generally there is no space For a long inflow of the OFC (necessary to guar antee a stable-steady-state expanding liquid surface). The vertical inflow dimensions are minimized using the design of a circular inflow plate with a calculated perforation distribution ensuring a cylindrical-symmetric inflo w. Measurements show that the surface flow of the designed cylinder has the required properties to study the dynamical air-liquid interface. (C) 2000 Elsevier Science B.V. All rights reserved.