Electron acceleration by wave turbulence in a magnetized plasma

A. Rigby, F. Cruz, B. Albertazzi, R. Bamford, A. R. Bell, J. E. Cross, F. Fraschetti, P. Graham, Y. Hara, P. M. Kozlowski, Y. Kuramitsu, D. Q. Lamb, S. Lebedev, J. R. Marques, F. Miniati, Taichi Morita, M. Oliver, B. Reville, Y. Sakawa, S. SarkarC. Spindloe, R. Trines, P. Tzeferacos, L. O. Silva, R. Bingham, M. Koenig, G. Gregori

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Astrophysical shocks are commonly revealed by the non-thermal emission of energetic electrons accelerated in situ 1-3 . Strong shocks are expected to accelerate particles to very high energies 4-6 ; however, they require a source of particles with velocities fast enough to permit multiple shock crossings. While the resulting diffusive shock acceleration 4 process can account for observations, the kinetic physics regulating the continuous injection of non-thermal particles is not well understood. Indeed, this injection problem is particularly acute for electrons, which rely on high-frequency plasma fluctuations to raise them above the thermal pool 7,8 . Here we show, using laboratory laser-produced shock experiments, that, in the presence of a strong magnetic field, significant electron pre-heating is achieved. We demonstrate that the key mechanism in producing these energetic electrons is through the generation of lower-hybrid turbulence via shock-reflected ions. Our experimental results are analogous to many astrophysical systems, including the interaction of a comet with the solar wind 9 , a setting where electron acceleration via lower-hybrid waves is possible.

Original languageEnglish
Pages (from-to)475-479
Number of pages5
JournalNature Physics
Volume14
Issue number5
DOIs
Publication statusPublished - May 1 2018

Fingerprint

electron acceleration
turbulence
shock
astrophysics
electrons
injection
nonthermal radiation
comets
solar wind
physics
heating
kinetics
magnetic fields
lasers
ions
interactions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Rigby, A., Cruz, F., Albertazzi, B., Bamford, R., Bell, A. R., Cross, J. E., ... Gregori, G. (2018). Electron acceleration by wave turbulence in a magnetized plasma. Nature Physics, 14(5), 475-479. https://doi.org/10.1038/s41567-018-0059-2

Electron acceleration by wave turbulence in a magnetized plasma. / Rigby, A.; Cruz, F.; Albertazzi, B.; Bamford, R.; Bell, A. R.; Cross, J. E.; Fraschetti, F.; Graham, P.; Hara, Y.; Kozlowski, P. M.; Kuramitsu, Y.; Lamb, D. Q.; Lebedev, S.; Marques, J. R.; Miniati, F.; Morita, Taichi; Oliver, M.; Reville, B.; Sakawa, Y.; Sarkar, S.; Spindloe, C.; Trines, R.; Tzeferacos, P.; Silva, L. O.; Bingham, R.; Koenig, M.; Gregori, G.

In: Nature Physics, Vol. 14, No. 5, 01.05.2018, p. 475-479.

Research output: Contribution to journalArticle

Rigby, A, Cruz, F, Albertazzi, B, Bamford, R, Bell, AR, Cross, JE, Fraschetti, F, Graham, P, Hara, Y, Kozlowski, PM, Kuramitsu, Y, Lamb, DQ, Lebedev, S, Marques, JR, Miniati, F, Morita, T, Oliver, M, Reville, B, Sakawa, Y, Sarkar, S, Spindloe, C, Trines, R, Tzeferacos, P, Silva, LO, Bingham, R, Koenig, M & Gregori, G 2018, 'Electron acceleration by wave turbulence in a magnetized plasma', Nature Physics, vol. 14, no. 5, pp. 475-479. https://doi.org/10.1038/s41567-018-0059-2
Rigby A, Cruz F, Albertazzi B, Bamford R, Bell AR, Cross JE et al. Electron acceleration by wave turbulence in a magnetized plasma. Nature Physics. 2018 May 1;14(5):475-479. https://doi.org/10.1038/s41567-018-0059-2
Rigby, A. ; Cruz, F. ; Albertazzi, B. ; Bamford, R. ; Bell, A. R. ; Cross, J. E. ; Fraschetti, F. ; Graham, P. ; Hara, Y. ; Kozlowski, P. M. ; Kuramitsu, Y. ; Lamb, D. Q. ; Lebedev, S. ; Marques, J. R. ; Miniati, F. ; Morita, Taichi ; Oliver, M. ; Reville, B. ; Sakawa, Y. ; Sarkar, S. ; Spindloe, C. ; Trines, R. ; Tzeferacos, P. ; Silva, L. O. ; Bingham, R. ; Koenig, M. ; Gregori, G. / Electron acceleration by wave turbulence in a magnetized plasma. In: Nature Physics. 2018 ; Vol. 14, No. 5. pp. 475-479.
@article{a93ad2f9b9854ce682dc584e7098b3cd,
title = "Electron acceleration by wave turbulence in a magnetized plasma",
abstract = "Astrophysical shocks are commonly revealed by the non-thermal emission of energetic electrons accelerated in situ 1-3 . Strong shocks are expected to accelerate particles to very high energies 4-6 ; however, they require a source of particles with velocities fast enough to permit multiple shock crossings. While the resulting diffusive shock acceleration 4 process can account for observations, the kinetic physics regulating the continuous injection of non-thermal particles is not well understood. Indeed, this injection problem is particularly acute for electrons, which rely on high-frequency plasma fluctuations to raise them above the thermal pool 7,8 . Here we show, using laboratory laser-produced shock experiments, that, in the presence of a strong magnetic field, significant electron pre-heating is achieved. We demonstrate that the key mechanism in producing these energetic electrons is through the generation of lower-hybrid turbulence via shock-reflected ions. Our experimental results are analogous to many astrophysical systems, including the interaction of a comet with the solar wind 9 , a setting where electron acceleration via lower-hybrid waves is possible.",
author = "A. Rigby and F. Cruz and B. Albertazzi and R. Bamford and Bell, {A. R.} and Cross, {J. E.} and F. Fraschetti and P. Graham and Y. Hara and Kozlowski, {P. M.} and Y. Kuramitsu and Lamb, {D. Q.} and S. Lebedev and Marques, {J. R.} and F. Miniati and Taichi Morita and M. Oliver and B. Reville and Y. Sakawa and S. Sarkar and C. Spindloe and R. Trines and P. Tzeferacos and Silva, {L. O.} and R. Bingham and M. Koenig and G. Gregori",
year = "2018",
month = "5",
day = "1",
doi = "10.1038/s41567-018-0059-2",
language = "English",
volume = "14",
pages = "475--479",
journal = "Nature Physics",
issn = "1745-2473",
publisher = "Nature Publishing Group",
number = "5",

}

TY - JOUR

T1 - Electron acceleration by wave turbulence in a magnetized plasma

AU - Rigby, A.

AU - Cruz, F.

AU - Albertazzi, B.

AU - Bamford, R.

AU - Bell, A. R.

AU - Cross, J. E.

AU - Fraschetti, F.

AU - Graham, P.

AU - Hara, Y.

AU - Kozlowski, P. M.

AU - Kuramitsu, Y.

AU - Lamb, D. Q.

AU - Lebedev, S.

AU - Marques, J. R.

AU - Miniati, F.

AU - Morita, Taichi

AU - Oliver, M.

AU - Reville, B.

AU - Sakawa, Y.

AU - Sarkar, S.

AU - Spindloe, C.

AU - Trines, R.

AU - Tzeferacos, P.

AU - Silva, L. O.

AU - Bingham, R.

AU - Koenig, M.

AU - Gregori, G.

PY - 2018/5/1

Y1 - 2018/5/1

N2 - Astrophysical shocks are commonly revealed by the non-thermal emission of energetic electrons accelerated in situ 1-3 . Strong shocks are expected to accelerate particles to very high energies 4-6 ; however, they require a source of particles with velocities fast enough to permit multiple shock crossings. While the resulting diffusive shock acceleration 4 process can account for observations, the kinetic physics regulating the continuous injection of non-thermal particles is not well understood. Indeed, this injection problem is particularly acute for electrons, which rely on high-frequency plasma fluctuations to raise them above the thermal pool 7,8 . Here we show, using laboratory laser-produced shock experiments, that, in the presence of a strong magnetic field, significant electron pre-heating is achieved. We demonstrate that the key mechanism in producing these energetic electrons is through the generation of lower-hybrid turbulence via shock-reflected ions. Our experimental results are analogous to many astrophysical systems, including the interaction of a comet with the solar wind 9 , a setting where electron acceleration via lower-hybrid waves is possible.

AB - Astrophysical shocks are commonly revealed by the non-thermal emission of energetic electrons accelerated in situ 1-3 . Strong shocks are expected to accelerate particles to very high energies 4-6 ; however, they require a source of particles with velocities fast enough to permit multiple shock crossings. While the resulting diffusive shock acceleration 4 process can account for observations, the kinetic physics regulating the continuous injection of non-thermal particles is not well understood. Indeed, this injection problem is particularly acute for electrons, which rely on high-frequency plasma fluctuations to raise them above the thermal pool 7,8 . Here we show, using laboratory laser-produced shock experiments, that, in the presence of a strong magnetic field, significant electron pre-heating is achieved. We demonstrate that the key mechanism in producing these energetic electrons is through the generation of lower-hybrid turbulence via shock-reflected ions. Our experimental results are analogous to many astrophysical systems, including the interaction of a comet with the solar wind 9 , a setting where electron acceleration via lower-hybrid waves is possible.

UR - http://www.scopus.com/inward/record.url?scp=85043514019&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85043514019&partnerID=8YFLogxK

U2 - 10.1038/s41567-018-0059-2

DO - 10.1038/s41567-018-0059-2

M3 - Article

AN - SCOPUS:85043514019

VL - 14

SP - 475

EP - 479

JO - Nature Physics

JF - Nature Physics

SN - 1745-2473

IS - 5

ER -