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Title: Kinetic modeling of x-ray laser-driven solid Al plasmas via particle-in-cell simulation

Authors:
; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1361577
Grant/Contract Number:
SC0008827; NA0002075
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 95; Journal Issue: 6; Related Information: CHORUS Timestamp: 2017-06-06 22:15:00; Journal ID: ISSN 2470-0045
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Royle, R., Sentoku, Y., Mancini, R. C., Paraschiv, I., and Johzaki, T. Kinetic modeling of x-ray laser-driven solid Al plasmas via particle-in-cell simulation. United States: N. p., 2017. Web. doi:10.1103/PhysRevE.95.063203.
Royle, R., Sentoku, Y., Mancini, R. C., Paraschiv, I., & Johzaki, T. Kinetic modeling of x-ray laser-driven solid Al plasmas via particle-in-cell simulation. United States. doi:10.1103/PhysRevE.95.063203.
Royle, R., Sentoku, Y., Mancini, R. C., Paraschiv, I., and Johzaki, T. Tue . "Kinetic modeling of x-ray laser-driven solid Al plasmas via particle-in-cell simulation". United States. doi:10.1103/PhysRevE.95.063203.
@article{osti_1361577,
title = {Kinetic modeling of x-ray laser-driven solid Al plasmas via particle-in-cell simulation},
author = {Royle, R. and Sentoku, Y. and Mancini, R. C. and Paraschiv, I. and Johzaki, T.},
abstractNote = {},
doi = {10.1103/PhysRevE.95.063203},
journal = {Physical Review E},
number = 6,
volume = 95,
place = {United States},
year = {Tue Jun 06 00:00:00 EDT 2017},
month = {Tue Jun 06 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on June 6, 2018
Publisher's Accepted Manuscript

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  • An in situ optical pump and x-ray probe technique has been utilized to study photoinitiated solid-state diffusion in a Ni-Pt multilayer system. Hard x-ray diffraction has been used to follow the systematic growth of the NiPt alloy as a function of laser intensity and total energy deposited. It is observed that new phase growth can be driven in as little as one laser pulse, and that repeated photoexcitation can completely convert the entire multilayer structure into a single metallic alloy. In conclusion, the data suggest that lattice strain relaxation takes place prior to atomic diffusion and the formation of amore » NiPt alloy.« less
  • No abstract prepared.
  • A full particle-in-cell simulation is developed to investigate electron-free plasmas constituted of positive and negative ions under the influence of a dc bias voltage. It is shown that high-voltage sheaths following the classical Child-law sheaths form within a few microseconds (which corresponds to the ion transit time) after the dc voltage is applied. It is also shown that there exists the equivalent of a Bohm criterion where a presheath accelerates the ions collected at one of the electrodes up to the sound speed before they enter the sheath. From an applied perspective, this leads to smaller sheaths than one wouldmore » expect.« less
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  • Using an X-ray free electron laser (XFEL) at 960 eV to photo-ionize the 1s electron in neutral neon followed by lasing on the 2p-1s transition in singly-ionized neon, an inner-shell X-ray laser was demonstrated at 849 eV in singly-ionized neon gas several years ago. It took decades to demonstrate this scheme, because it required a very strong X-ray source that could photo-ionize the 1s (K shell) electron in neon on a timescale comparable to the intrinsic Auger lifetime in neon of 2 fs. In this paper, we model the neon inner shell X-ray laser under similar conditions to those usedmore » in the XFEL experiments at the SLAC Linac Coherent Light Source (LCLS), and show how we can improve the efficiency of the neon laser and reduce the drive requirements by tuning the XFEL to the 1s-3p transition in neutral neon in order to create gain on the 2p-1s line in neutral neon. We also show how the XFEL could be used to photo-ionize L-shell electrons to drive gain on n = 3–2 transitions in singly-ionized Ar and Cu plasmas. Furthermore, these bright, coherent, and monochromatic X-ray lasers may prove very useful for doing high-resolution spectroscopy and for studying non-linear process in the X-ray regime.« less