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Measurements of magnetic field generation at ionization fronts from laser wakefield acceleration experiments

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Measurements of magnetic field generation at ionization fronts from laser wakefield acceleration experiments. / Walton, B.; Dangor, A. E.; Mangles, Stuart P. D. et al.
In: New Journal of Physics, Vol. 15, 025034, 25.02.2013.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Walton, B, Dangor, AE, Mangles, SPD, Najmudin, Z, Krushelnick, K, Thomas, AGR, Fritzler, S & Malka, V 2013, 'Measurements of magnetic field generation at ionization fronts from laser wakefield acceleration experiments', New Journal of Physics, vol. 15, 025034. https://doi.org/10.1088/1367-2630/15/2/025034

APA

Walton, B., Dangor, A. E., Mangles, S. P. D., Najmudin, Z., Krushelnick, K., Thomas, A. G. R., Fritzler, S., & Malka, V. (2013). Measurements of magnetic field generation at ionization fronts from laser wakefield acceleration experiments. New Journal of Physics, 15, Article 025034. https://doi.org/10.1088/1367-2630/15/2/025034

Vancouver

Walton B, Dangor AE, Mangles SPD, Najmudin Z, Krushelnick K, Thomas AGR et al. Measurements of magnetic field generation at ionization fronts from laser wakefield acceleration experiments. New Journal of Physics. 2013 Feb 25;15:025034. doi: 10.1088/1367-2630/15/2/025034

Author

Walton, B. ; Dangor, A. E. ; Mangles, Stuart P. D. et al. / Measurements of magnetic field generation at ionization fronts from laser wakefield acceleration experiments. In: New Journal of Physics. 2013 ; Vol. 15.

Bibtex

@article{49881b51269d4035a4f01592493ecaa6,
title = "Measurements of magnetic field generation at ionization fronts from laser wakefield acceleration experiments",
abstract = "Laser wakefield acceleration experiments were performed using a 30 fs, 1 J laser pulse interacting with an underdense helium plasma. Temporally resolved polarimetry measurements demonstrate the presence of magnetic fields at the ionization front within the plasma which had a peak strength of ~2.8 MG and a radial extent of approximately 200 μm. The field was seen to vary in strength over picosecond time-scales. The field is likely generated by return current generated in the plasma at the interface between plasma and neutral gas and which is caused by hot electrons produced in the wakefield during formation of a plasma 'bubble' and prior to the time of wave-breaking (beam injection). These effects are confirmed using particle-in-cell simulations. Such measurements can be useful as a diagnostic of bubble formation in laser wakefield accelerators.",
author = "B. Walton and Dangor, {A. E.} and Mangles, {Stuart P. D.} and Zulfikar Najmudin and Karl Krushelnick and Thomas, {Alexander George Roy} and S. Fritzler and V. Malka",
year = "2013",
month = feb,
day = "25",
doi = "10.1088/1367-2630/15/2/025034",
language = "English",
volume = "15",
journal = "New Journal of Physics",
issn = "1367-2630",
publisher = "IOP Publishing Ltd",

}

RIS

TY - JOUR

T1 - Measurements of magnetic field generation at ionization fronts from laser wakefield acceleration experiments

AU - Walton, B.

AU - Dangor, A. E.

AU - Mangles, Stuart P. D.

AU - Najmudin, Zulfikar

AU - Krushelnick, Karl

AU - Thomas, Alexander George Roy

AU - Fritzler, S.

AU - Malka, V.

PY - 2013/2/25

Y1 - 2013/2/25

N2 - Laser wakefield acceleration experiments were performed using a 30 fs, 1 J laser pulse interacting with an underdense helium plasma. Temporally resolved polarimetry measurements demonstrate the presence of magnetic fields at the ionization front within the plasma which had a peak strength of ~2.8 MG and a radial extent of approximately 200 μm. The field was seen to vary in strength over picosecond time-scales. The field is likely generated by return current generated in the plasma at the interface between plasma and neutral gas and which is caused by hot electrons produced in the wakefield during formation of a plasma 'bubble' and prior to the time of wave-breaking (beam injection). These effects are confirmed using particle-in-cell simulations. Such measurements can be useful as a diagnostic of bubble formation in laser wakefield accelerators.

AB - Laser wakefield acceleration experiments were performed using a 30 fs, 1 J laser pulse interacting with an underdense helium plasma. Temporally resolved polarimetry measurements demonstrate the presence of magnetic fields at the ionization front within the plasma which had a peak strength of ~2.8 MG and a radial extent of approximately 200 μm. The field was seen to vary in strength over picosecond time-scales. The field is likely generated by return current generated in the plasma at the interface between plasma and neutral gas and which is caused by hot electrons produced in the wakefield during formation of a plasma 'bubble' and prior to the time of wave-breaking (beam injection). These effects are confirmed using particle-in-cell simulations. Such measurements can be useful as a diagnostic of bubble formation in laser wakefield accelerators.

U2 - 10.1088/1367-2630/15/2/025034

DO - 10.1088/1367-2630/15/2/025034

M3 - Journal article

VL - 15

JO - New Journal of Physics

JF - New Journal of Physics

SN - 1367-2630

M1 - 025034

ER -