When
Presenter
Andrei Nefiodov
Leading Research Fellow, Department of Theoretical Physics, Petersburg Nuclear Physics Institute, Gatchina, Russia
Abstract
A new method is proposed for efficient production of ions of arbitrary elements in any charge states, in particular, of highly charged ions of heavy elements. The ions are produced and confined in local potential traps formed by the rippled electron beam in a focusing magnetic field. The electron current density can reach extremely high values of the order of 10 kA/cm^2 on a short length of the ion trap.
Based on this method, a family of hand-size ion sources with electron beam energy ranging from a few tens of eV up to a few tens of keV has been developed. The extraction of ions from the ion source can be realized in both axial and radial directions. The devices are named MaMFIS (Main Magnetic Focus Ion Sources). Without the ion extraction, MaMFIS serves as a source of characteristic radiation. The devices operate at room temperature due to the use of permanent magnets and standard vacuum techniques. The novel ion sources offer many applications in atomic and nuclear physics, plasma physics, solid-state physics, single ion implantation, ion lithography and other fields.
Bio-sketch
Andrei Nefiodov graduated from Leningrad (now St. Petersburg) State University (Faculty of Physics, Department of Quantum Mechanics) in 1988. In 1991, Andrei got PhD in Theoretical and Mathematical Physics from St. Petersburg State University. Since 1992 Andrei has been working in Petersburg Nuclear Physics Institute, Department of Theoretical Physics, currently in the position of Leading Research Fellow. In 1997-1998, Dr. Nefiodov was an Honorary Research Fellow of the Royal Society at the University College London (UK). In 2001-2002, he was Alexander von Humboldt Fellow in the Institute for Theoretical Physics at Dresden University of Technology (Germany). In 2004, Dr. Nefiodov habilitated in Theoretical and Mathematical Physics
Host:
Dr. Andrei Sanov