Demonstration of femtosecond broadband X-rays from laser wakefield acceleration as a source for pump-probe X-ray absorption studies

doi:10.1016/j.hedp.2019.100729

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Title: Demonstration of femtosecond broadband X-rays from laser wakefield acceleration as a source for pump-probe X-ray absorption studies

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Abstract

Here, we present X-ray absorption measurements near the K-edge of laser heated aluminum in a pump-probe configuration using X-rays generated in a laser wakefield accelerator. A 30 fs duration laser pulse from the Hercules laser system was split into two beamlines, with one used to heat a 4 $μ$m thickness Al foil and the second to drive a laser wakefield accelerator. The laser-heated plasma was probed at various pump- probe delays using the femtosecond duration X-rays generated by betatron oscillations of the electrons in the wakefield. We observe an apparent blue-shift of the K-edge occurring on a sub-picosecond timescale in the transmission spectra.

Authors:

Behm, K. ^[1]; Hussein, A. E. ^[1]; Zhao, T. Z. ^[1]; Baggott, R. A. ^[2]; Cole, J. M. ^[2]; Hill, E. ^[2]; Krushelnick, K. ^[1]; Maksimchuk, A. ^[1]; Nees, J. ^[1]; Rose, S. J. ^[1];

^[1]; Watt, R. ^[2]; Wood, J. C. ^[2]; Yanovsky, V. ^[1]; Mangles, S. P. D. ^[2]

Univ. of Michigan, Ann Arbor, MI (United States)
Imperial College, London (United Kingdom)

Publication Date:: 2019-11-02

Research Org.:: Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1594973

Grant/Contract Number:: SC0019186

Resource Type:: Accepted Manuscript

Journal Name:: High Energy Density Physics

Additional Journal Information:: Journal Volume: 35; Journal Issue: C; Journal ID: ISSN 1574-1818

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; X-ray; Pump-probe; Laser; Plasma

Citation Formats


                    Behm, K., Hussein, A. E., Zhao, T. Z., Baggott, R. A., Cole, J. M., Hill, E., Krushelnick, K., Maksimchuk, A., Nees, J., Rose, S. J., Thomas, A. G. R., Watt, R., Wood, J. C., Yanovsky, V., and Mangles, S. P. D. Demonstration of femtosecond broadband X-rays from laser wakefield acceleration as a source for pump-probe X-ray absorption studies.  United States: N. p., 2019. 
        Web.  doi:10.1016/j.hedp.2019.100729.

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                    Behm, K., Hussein, A. E., Zhao, T. Z., Baggott, R. A., Cole, J. M., Hill, E., Krushelnick, K., Maksimchuk, A., Nees, J., Rose, S. J., Thomas, A. G. R., Watt, R., Wood, J. C., Yanovsky, V., & Mangles, S. P. D. Demonstration of femtosecond broadband X-rays from laser wakefield acceleration as a source for pump-probe X-ray absorption studies.  United States.  doi:10.1016/j.hedp.2019.100729.

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                    Behm, K., Hussein, A. E., Zhao, T. Z., Baggott, R. A., Cole, J. M., Hill, E., Krushelnick, K., Maksimchuk, A., Nees, J., Rose, S. J., Thomas, A. G. R., Watt, R., Wood, J. C., Yanovsky, V., and Mangles, S. P. D. Sat .  
        "Demonstration of femtosecond broadband X-rays from laser wakefield acceleration as a source for pump-probe X-ray absorption studies".  United States.  doi:10.1016/j.hedp.2019.100729.

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@article{osti_1594973,

  title        = {Demonstration of femtosecond broadband X-rays from laser wakefield acceleration as a source for pump-probe X-ray absorption studies},

  author       = {Behm, K. and Hussein, A. E. and Zhao, T. Z. and Baggott, R. A. and Cole, J. M. and Hill, E. and Krushelnick, K. and Maksimchuk, A. and Nees, J. and Rose, S. J. and Thomas, A. G. R. and Watt, R. and Wood, J. C. and Yanovsky, V. and Mangles, S. P. D.},

  abstractNote = {Here, we present X-ray absorption measurements near the K-edge of laser heated aluminum in a pump-probe configuration using X-rays generated in a laser wakefield accelerator. A 30 fs duration laser pulse from the Hercules laser system was split into two beamlines, with one used to heat a 4 $μ$m thickness Al foil and the second to drive a laser wakefield accelerator. The laser-heated plasma was probed at various pump- probe delays using the femtosecond duration X-rays generated by betatron oscillations of the electrons in the wakefield. We observe an apparent blue-shift of the K-edge occurring on a sub-picosecond timescale in the transmission spectra.},

  doi          = {10.1016/j.hedp.2019.100729},

  journal      = {High Energy Density Physics},

  number       = C,

  volume       = 35,

  place        = {United States},

  year         = {2019},

  month        = {11}

}

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