Advanced

Dependence of laser accelerated protons on laser energy following the interaction of defocused, intense laser pulses with ultra-thin targets

Brenner, C. M.; Green, J. S.; Robinson, A. P. L.; Carroll, D. C.; Dromey, B.; Foster, P. S.; Kar, S.; Li, Y. T.; Markey, K. and Spindloe, C., et al. (2011) In Laser and Particle Beams 29(3). p.345-351
Abstract
The scaling of the flux and maximum energy of laser-driven sheath-accelerated protons has been investigated as a function of laser pulse energy in the range of 15-380 mJ at intensities of 10(16)-10(18) W/cm(2). The pulse duration and target thickness were fixed at 40 fs and 25 nm, respectively, while the laser focal spot size and drive energy were varied. Our results indicate that while the maximum proton energy is dependent on the laser energy and laser spot diameter, the proton flux is primarily related to the laser pulse energy under the conditions studied here. Our measurements show that increasing the laser energy by an order of magnitude results in a more than 500-fold increase in the observed proton flux. Whereas, an order of... (More)
The scaling of the flux and maximum energy of laser-driven sheath-accelerated protons has been investigated as a function of laser pulse energy in the range of 15-380 mJ at intensities of 10(16)-10(18) W/cm(2). The pulse duration and target thickness were fixed at 40 fs and 25 nm, respectively, while the laser focal spot size and drive energy were varied. Our results indicate that while the maximum proton energy is dependent on the laser energy and laser spot diameter, the proton flux is primarily related to the laser pulse energy under the conditions studied here. Our measurements show that increasing the laser energy by an order of magnitude results in a more than 500-fold increase in the observed proton flux. Whereas, an order of magnitude increase in the laser intensity generated by decreasing the laser focal spot size, at constant laser energy, gives rise to less than a tenfold increase in observed proton flux. (Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Flux scaling, Laser plasma acceleration, Laser, Laser-driven ion, acceleration, Proton
in
Laser and Particle Beams
volume
29
issue
3
pages
345 - 351
publisher
Cambridge University Press
external identifiers
  • wos:000295233800010
  • scopus:82555168044
ISSN
0263-0346
DOI
10.1017/S0263034611000395
language
English
LU publication?
yes
id
8e9800c1-c46b-4241-a39f-e141e87e400b (old id 2179350)
date added to LUP
2011-10-25 09:25:14
date last changed
2017-02-26 04:04:47
@article{8e9800c1-c46b-4241-a39f-e141e87e400b,
  abstract     = {The scaling of the flux and maximum energy of laser-driven sheath-accelerated protons has been investigated as a function of laser pulse energy in the range of 15-380 mJ at intensities of 10(16)-10(18) W/cm(2). The pulse duration and target thickness were fixed at 40 fs and 25 nm, respectively, while the laser focal spot size and drive energy were varied. Our results indicate that while the maximum proton energy is dependent on the laser energy and laser spot diameter, the proton flux is primarily related to the laser pulse energy under the conditions studied here. Our measurements show that increasing the laser energy by an order of magnitude results in a more than 500-fold increase in the observed proton flux. Whereas, an order of magnitude increase in the laser intensity generated by decreasing the laser focal spot size, at constant laser energy, gives rise to less than a tenfold increase in observed proton flux.},
  author       = {Brenner, C. M. and Green, J. S. and Robinson, A. P. L. and Carroll, D. C. and Dromey, B. and Foster, P. S. and Kar, S. and Li, Y. T. and Markey, K. and Spindloe, C. and Streeter, M. J. V. and Tolley, M. and Wahlström, Claes-Göran and Xu, M. H. and Zepf, M. and Mckenna, P. and Neely, D.},
  issn         = {0263-0346},
  keyword      = {Flux scaling,Laser plasma acceleration,Laser,Laser-driven ion,acceleration,Proton},
  language     = {eng},
  number       = {3},
  pages        = {345--351},
  publisher    = {Cambridge University Press},
  series       = {Laser and Particle Beams},
  title        = {Dependence of laser accelerated protons on laser energy following the interaction of defocused, intense laser pulses with ultra-thin targets},
  url          = {http://dx.doi.org/10.1017/S0263034611000395},
  volume       = {29},
  year         = {2011},
}