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Laser generated 300 keV electron beams from water

Uhlig, Jens LU ; Wahlström, Claes-Göran LU ; Walczak, Monika LU ; Sundström, Villy LU and Fullagar, Wilfred LU (2011) In Laser and Particle Beams 29(4). p.415-424
Abstract (Swedish)
Abstract in Undetermined

300 keV electron beams with energy peaked in the range 280–390 keV were generated by focusing a high contrast ratio but temporally double pulsed 800 nm ultrafast laser onto a flowing water jet under both helium atmosphere at ambient pressure and water aspirator vacuum conditions, using laser intensities in the range 1015–1018 Wcm−2. Their characteristics have been investigated as functions of inter-pulse delay, incidence geometry and laser pulse chirp. Shot-to-shot variation of the beams' equatorial and azimuthal distributions was also recorded in real time. Measurements of the emitted charge and energy have been performed. Secondary X-ray emission arising from impingement of the electron beams on... (More)
Abstract in Undetermined

300 keV electron beams with energy peaked in the range 280–390 keV were generated by focusing a high contrast ratio but temporally double pulsed 800 nm ultrafast laser onto a flowing water jet under both helium atmosphere at ambient pressure and water aspirator vacuum conditions, using laser intensities in the range 1015–1018 Wcm−2. Their characteristics have been investigated as functions of inter-pulse delay, incidence geometry and laser pulse chirp. Shot-to-shot variation of the beams' equatorial and azimuthal distributions was also recorded in real time. Measurements of the emitted charge and energy have been performed. Secondary X-ray emission arising from impingement of the electron beams on the target chamber walls and other parts of the apparatus have been identified. Preliminary results after transition to a high repetition rate laser system have shown similar behavior. Approaches for improvements and applications are suggested. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Fast electrons, Laser-plasma wakefield acceleration, Multi-pulse structure, Plasma source, Table top X-ray source
in
Laser and Particle Beams
volume
29
issue
4
pages
415 - 424
publisher
Cambridge University Press
external identifiers
  • wos:000298714600005
  • scopus:84055221951
ISSN
0263-0346
DOI
10.1017/S0263034611000516
language
English
LU publication?
yes
id
4cccf832-5d97-4fad-a9ec-4a357d5bb8da (old id 2256975)
date added to LUP
2011-12-23 12:16:58
date last changed
2017-08-13 04:02:44
@article{4cccf832-5d97-4fad-a9ec-4a357d5bb8da,
  abstract     = {<b>Abstract in Undetermined</b><br/><br>
300 keV electron beams with energy peaked in the range 280–390 keV were generated by focusing a high contrast ratio but temporally double pulsed 800 nm ultrafast laser onto a flowing water jet under both helium atmosphere at ambient pressure and water aspirator vacuum conditions, using laser intensities in the range 1015–1018 Wcm−2. Their characteristics have been investigated as functions of inter-pulse delay, incidence geometry and laser pulse chirp. Shot-to-shot variation of the beams' equatorial and azimuthal distributions was also recorded in real time. Measurements of the emitted charge and energy have been performed. Secondary X-ray emission arising from impingement of the electron beams on the target chamber walls and other parts of the apparatus have been identified. Preliminary results after transition to a high repetition rate laser system have shown similar behavior. Approaches for improvements and applications are suggested.},
  author       = {Uhlig, Jens and Wahlström, Claes-Göran and Walczak, Monika and Sundström, Villy and Fullagar, Wilfred},
  issn         = {0263-0346},
  keyword      = {Fast electrons,Laser-plasma wakefield acceleration,Multi-pulse structure,Plasma source,Table top X-ray source},
  language     = {eng},
  number       = {4},
  pages        = {415--424},
  publisher    = {Cambridge University Press},
  series       = {Laser and Particle Beams},
  title        = {Laser generated 300 keV electron beams from water},
  url          = {http://dx.doi.org/10.1017/S0263034611000516},
  volume       = {29},
  year         = {2011},
}