Properties of Bi LMIS with ion clusters

0350670 - ÚPT 2011 RIV CZ eng C - Conference Paper (international conference)
Radlička, Tomáš
Properties of Bi LMIS with ion clusters.
Proceedings of the 12th International Seminar on Recent Trends in Charged Particle Optics and Surface Physics Instrumentation. Brno: Institute of Scientific Instruments AS CR, v.v.i, 2010 - (Mika, F.), s. 57-58. ISBN 978-80-254-6842-5.
[International Seminar on Recent Trends in Charged Particle Optics and Surface Physics Instrumentation /12./. Skalský dvůr (CZ), 31.05.2010-04.06.2010]
Grant - others:EC 7FP(XE) NMP4-SE-2008-200613
Institutional research plan: CEZ:AV0Z20650511
Source of funding: R - Framework programmes of European Commission
Keywords : SIMS * liquid–metal ion sources (LMIS) * discrete coulomb interactions (DCI)
Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering
http://arl-repository.lib.cas.cz/uloziste_av/UPT-D/cav_un_epca-0350670_01.pdf

The ion beams used in SIMS are produced by liquid–metal ion sources (LMIS) which provide fine, optically bright ion beams even for low emission currents around 1 .mu.A or less. The typical energy of the primary beam varies from 10 to 40 keV. The properties of the LMIS are strongly limited by the effect of the Discrete Coulomb Interactions (DCI) near the source. The DCI increase the energy width (Boersh effect) and decrease the brightness of the source due to the trajectory displacement effect. Contrary to the Ga LMIS which contains mostly only Ga+ ions, in case of the Bi LMIS the ion beam consists of several ion types and clusters of ions with similar currents. Because each ion type has different charge and mass they will be accelerated to different velocities, which increase the number of interactions and decreases the quality of the source. The aim of this contribution is a simulation of the effect of the clusters on the source properties based on the MC simulation.
Permanent Link: http://hdl.handle.net/11104/0190610