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 10(14) W/cm(2) 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 characteristics as the hidden partial currents of the ionized species constituting the total measured current the centre-of-mass velocity of individual charge states their abundance and the ion temperature.

Emission characteristics and stability of laser ion sources

LORUSSO, ANTONELLA;VELARDI, LUCIANO;NASSISI, Vincenzo;
2010-01-01

Abstract

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 10(14) W/cm(2) 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 characteristics as the hidden partial currents of the ionized species constituting the total measured current the centre-of-mass velocity of individual charge states their abundance and the ion temperature.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11587/361947
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact