Abstract: An ion detection arrangement 140 for a time-of-flight (TOF) mass spectrometer 10 includes a beam splitter formed as a mesh 150 at the end of the TOF acceleration and detection chamber 110. Ions enter the detection arrangement through a common entrance window and are then divided by the beam splitter. Those ions striking the mesh 150 generate secondary electrons 160 which are detected by a microchannel plate forming a first detector 170. Those ions passing through the ion beam splitter are detected directly by a second detector 190 also formed from a microchannel plate. The two detectors are each connected to a corresponding data acquisition system 180, 200 and the data obtained by each are combined to generate a mass spectrum. The problems of detector saturation are thus avoided.

Abstract: A decorative cover is provided which easily fits over a water bottle mounted on a water dispenser. This cover provides a variably changeable decor that can fit different tastes and environments. Further, this cover includes accessory features such as a handle for easy removal of the cover, a cup dispenser, and a pouch for storing water delivery schedules, bills and the like. In one embodiment the cover is constructed of a loose fitting material and includes a top portion and a side portion. In an alternate embodiment the cover is constructed of a rigid material designed to stand on its own around the water bottle. In this embodiment the cover can include a top portion or can leave the water bottle exposed on the top. This rigid material can be foam rubber coated with plastic for writing and erasing messages or metallic for attaching messages by magnetic means.