| NUKLEONIKA 2012, 57(3):323-332
POST ACCELERATION OF IONS EMITTED FROM LASER
AND SPARK-GENERATED PLASMAS
Lorenzo Torrisi1,2, Salvadore Cavallaro2, Marcin Rosiński3,
Vincenzo Nassisi4, Victor Paperny5, Igor Romanov6
1 Universita di Messina, Ctr. da Papardo-Sperone 31, 98166 Messina, Italy
2 Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare (INFN)
(National Institute for Nuclear Physics),
62 S. Sofia Str., 95123 Catania, Italy
3 Institute of Plasma Physics and Laser Microfusion, 23 Hery Str., 01-497 Warsaw, Poland
4 Dipartimento di Fisica, Universita del Salento, INFN, Via Arnesano, Lecce, Italy
5 Physics Department, Irkutsk State University, 1 K. Marx Str., Irkutsk, 664003, Russia
6 P. N. Lebedev Physical Institute, Russian Academy of Sciences,
53 Leninsky Prospect, Moscow, 117924, Russia
Pulsed lasers at intensities of the order of 1010 W/cm2 interacting with solid matter in vacuum, produce hot plasmas at high temperatures and densities. The charge state distributions of the plasma generate a high electric field, which induces high ion acceleration along the normal to the target surface. The high yield of the emitted ions can generate a near constant current by using repetitive pulses irradiating thick targets. In order to increase ion energy, a post-acceleration system can be employed by using acceleration voltages above 10 kV. Special ion extraction methods can be employed to generate the final ion beam, which is multi-ionic and multi-energetic, due to the presence of different ion species and of different charge states. In this article four different methods of post ion acceleration, employed at the INFN-LNS of Catania, at the IPPLM of Warsaw, at the INFN of Lecce and at the LPI of Moscow, are presented, discussed and compared. All methods are able to implant ions in different substrates at different depth and at different dose-rates.
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