Emission characteristics and stability of laser ion sources

0351081 - FZÚ 2011 RIV GB eng J - Článek v odborném periodiku
Krása, Josef - Velyhan, Andriy - Krouský, Eduard - Láska, Leoš - Rohlena, Karel - Jungwirth, Karel - Ullschmied, Jiří - Lorusso, A. - Velardi, L. - Nassisi, V. - Czarnecka, A. - Ryc, L. - Parys, P. - Wolowski, J.
Emission characteristics and stability of laser ion sources.
Vacuum. Roč. 85, č. 5 (2010), s. 617-621. ISSN 0042-207X. E-ISSN 1879-2715
Grant CEP: GA AV ČR IAA100100715
Výzkumný záměr: CEZ:AV0Z10100523; CEZ:AV0Z20430508
Klíčová slova: laser ion sources * ion emission reproducibility * thermal and fast ions * ion temperature * centre-of-mass velocity
Kód oboru RIV: BH - Optika, masery a lasery
Impakt faktor: 1.048, rok: 2010

A new classification of laser ion sources concerning their pulse-to-pulse reproducibility in the ion emission is proposed. In particular, we distinguish between plasmas according to the electron distribution and changing its characteristics at a laser intensity threshold of 1014 W/cm2. Well reproducible continuous pulsed ion currents are typical for the intensity below the threshold. In contrast to this plasma the “two-temperature” plasma arising for the intensity above this threshold shows not only a separation of charges in space and time during the expansion but it also shows outbursts of ions similar to a self-pulsing instability leading to a chaos. The sequence of fast ion outbursts visible on the time-resolved ion currents is sensitive to the details of non-linear interaction of the laser beam with the generated plasma.
Trvalý link: http://hdl.handle.net/11104/0190909