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Machine B is a flexible ion-source-development mass spectrometer. The development of better ion sources is important in a var iety of areas including biochemistry (and engineering) and metal chemistry (organometallic chemistry). Biochemists are very interested in finding efficient combinations of matrix, analyte, and other parameters in order to increase both the number of syste ms that they can study as well as increase the speed with which they can be studied. In order to take full advantage of the photoelectron-photofragment coincidence technique, novel sources of negative ions need to be found. Machine B provides a flexible p latform for ion source development with both straight time-of-flight imaging and reflectron time-of-flight analysis. Experiments carried out with this apparatus to date have included a novel cryogenic-matrix laser-desorption-ionization (LDI) study on tran sition metal oxides. Below is a picture of the machine. On the left is the source region, and towards the back is the detection region.
Silvia De Dea currently runs Machine B. |