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Type: 
Journal
Description: 
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.Analysis of ion sources based on a time-of-flight signal function is applied to quantify their emission …
Publisher: 
Pergamon
Publication date: 
9 Nov 2010
Authors: 

Josef Krása, Andriy Velyhan, Eduard Krouský, Leoš Láska, Karel Rohlena, Karel Jungwirth, Jiří Ullschmied, Antonella Lorusso, Luciano Velardi, Vincenzo Nassisi, Agata Czarnecka, Leszek Ryć, Piotr Parys, Jerzy Wołowski

Biblio References: 
Volume: 85 Issue: 5 Pages: 617-621
Origin: 
Vacuum