Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8042571 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2013 | 4 Pages |
Abstract
Earlier we have proposed the idea in optics of one-stage quadrupole probe-forming systems that consisted in using independent power supplies for all lenses [1]. The new arrangement, in comparison to Oxford triplets and Russian quadruplets, theoretically allows operating in regimes with considerably higher density of ion current. The probe-forming system of the Sumy microprobe has been arranged as a quadruplet with four independent lens power supplies. Current density growth was experimentally verified and sub-micron probe size was obtained, despite the large working distance of 23.5Â cm, the moderate beam brightness of 7Â A/(m2Â rad2Â eV) and the energy spread of 10â3. This upgrade did not require changes in the beam-line design.
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Authors
K.I. Melnik, D.V. Magilin, A.G. Ponomarev,