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  Evidence for ultra-fast heating in intense-laser irradiated reduced-mass targets.

Neumayer, P., Aurand, B., Costa Fraga, R. A., Ecker, B., Grisenti, R. E., Gumberidze, A., et al. (2012). Evidence for ultra-fast heating in intense-laser irradiated reduced-mass targets. Physics of plasmas, 19: 122708. doi:10.1063/1.4772773.

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Neumayer, P., Author
Aurand, B., Author
Costa Fraga, R. A. , Author
Ecker, B., Author
Grisenti, R. E., Author
Gumberidze, A., Author
Hochhaus, D. C., Author
Kalinin, A., Author
Kaluza, M. C., Author
Kühl, T., Author
Polz, J., Author
Reuschl, R., Author
Stöhlker, T., Author
Winters, D., Author
Winters, N., Author
Yin, Z.1, Author           
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1Research Group of Structural Dynamics of (Bio)Chemical Systems, MPI for biophysical chemistry, Max Planck Society, 15915              

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 Abstract: We report on an experiment irradiating individual argon droplets of 20 lm diameter with laser pulses of several Joule energy at intensities of 1019 W/cm2. K-shell emission spectroscopy was employed to determine the hot electron energy fraction and the time-integrated charge-state distribution. Spectral fitting indicates that bulk temperatures up to 160 eV are reached. Modelling of the hot-electron relaxation and generation of K-shell emission with collisional hot-electron stopping only is incompatible with the experimental results, and the data suggest an additional ultra-fast (sub-ps) heating contribution. For example, including resistive heating in the modelling yields a much better agreement with the observed final bulk temperature and qualitatively reproduces the observed charge state distribution.

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 Dates: 2012-12-27
 Publication Status: Published online
 Pages: 8
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1063/1.4772773
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Title: Physics of plasmas
Source Genre: Journal
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Pages: - Volume / Issue: 19 Sequence Number: 122708 Start / End Page: - Identifier: -