ETD system

Electronic theses and dissertations repository

 

Tesi etd-06232014-104934


Thesis type
Tesi di laurea magistrale
Author
CANTONO, GIADA
URN
etd-06232014-104934
Title
Ultrafast proton probing of intense laser-driven current propagation
Struttura
FISICA
Corso di studi
FISICA
Commissione
relatore Prof. Macchi, Andrea
relatore Prof. Borghesi, Marco
Parole chiave
  • microlenses
  • plasma
  • laser
  • focusing
  • return current
  • ultrafast
  • proton radiography
  • transient charging
  • hot electrons
  • TNSA
Data inizio appello
15/07/2014;
Consultabilità
completa
Riassunto analitico
The experiment described in the thesis is meant to investigate the propagation of an ultrafast return current developed on a laser-irradiated gold foil and propagating along a metallic wire connected to it. The foil charging is due to the permanent escape to vacuum of a fraction of highly energetic laser-accelerated hot electrons from the target surface. The proton beam produced via TNSA mechanisms is employed in a time of flight arrangement to diagnose the transient positive charge induced along the wire on a radiochromic film stack. The current strength, duration and velocity are inferred from the experimental data and simulation codes. The analysis is crucial to develop a new target geometry designed to obtain a chromatic focusing of the laser-driven proton beam, which is of main importance for several future applications. The laser-driven micro-lens functioning and manufacturing procedure are also addressed in the thesis.
File