A fast pixel array detector, the Pilatus 100 K, has been
used in studies of organic monolayers at the air-water interface. The area
sensitivity and large dynamic range of the detector, in combination with a
“one dimensional pinhole” geometry, make it possible to observe surface
processes which were inaccessible to the previous generation of experimental
techniques. Especially, time dependent phenomena acting on time scales
ranging from seconds to minutes can be observed and analyzed.