The Wien filter: History, fundamentals and modern applications

Performance of the double-Wien filter of the Neoma MC-ICPMS/MS with an application to copper stable isotope compositions

“…The MS/MS equipment consists of a double-Wien lter and a collision/reaction cell. 47 The Wien lter is an important device in charged particle optics because it is a static eld mass lter that deects charged particles according to their velocity, 56 or equivalently their mass-to-charge ratio (m/z). While the Wien lter properties can also be used in electron microscopy, 57 we will consider here the case where charged particles are ions.…”

Experimental results using an improved low-energy focussed ion beam column with booster principle and free-standing target

“…Furthermore, it has been experimentally proven that a long telecentric beam path between condenser lens and objective lens does not profoundly limit the probe size by CI. This opens the possibility of directly integrating a partially corrected mass separator unit [31] in this region and to operate the column with an alloy LMIS. We will soon report on this upgrading for direct deposition of materials.…”

Ion beam intensity and phase space measurement techniques for ion sources

“…By using an electrostatic field Ex perpendicular to magnetic field By, with both being perpendicular to the beam velocity vz, and observing the particles not bending in the combined field, one can produce a so-called Wien filter. 25 Particles not bent have Lorentz force F = q(Ex − vzBy) = 0, making the filter a velocity selector, where vz = Ex/By = √ 2qU/m. Similar to the magnetic separator, the Wien filter separates particles by m/q.…”