Synthesis of fringing magnetic fields for static mass analyzers of spectrographic type
T15N1
A.S. Berdnikov, L.N. Gall, A.S. Antonov, K.V. Soloviev
Static mass analyzers provide a unique potential opportunity to achieve 100% utilization of ions generated by a continuously operating ion source. However, to achieve this property it is necessary that the mass analyzer should operate not in spectrometric but in spectrographic mode. It is known that the classical Mattauch-Herzog scheme provides a spectrographic mode with double focusing (in angle and energy) along the straight focal line but of the first order only. The use of more complex optical solutions is prevented by the fringing fields of static magnets, which violate the exact spectrographic mode of operation of the instrument. The paper shows how, using the principle of the similarity of trajectories in Euler-homogeneous fields, it is possible to purposefully synthesize asymmetric fringing magnetic fields of a special type which keeps the spectrographic mode and the straightness of the focus line for static mass analyzers. Such fringing fields and fringing configurations of magnetic poles and screens can become the basis for static mass spectrographs of a new type with high optical characteristics.
