Electron acceleration by wave turbulence in a magnetized plasma

Rigby, A.; Cruz, F.; Albertazzi, B.; Bamford, R.; Bell, A. R.; Cross, J. E.; Fraschetti, Federico; Graham, Peter W.; Hara, Y.; Kozłowski, Paweł; Kuramitsu, Yasuhiro; Lamb, D. Q.; Лебедев, С. В.; Marquès, J. R.; Miniati, Francesco; Morita, T.; Oliver, M.; Reville, Brian; Sakawa, Y.; Sarkar, S.; Spindloe, C.; Trines, R. M. G. M.; Tzeferacos, Petros; Silva, L. O.; Bingham, R.; Kœnig, M.; Gregori, G.

doi:10.1038/s41567-018-0059-2

Cited by 32 publications

(34 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Assuming the size of the turbulence region upstream the shock to be 1 mm, an electron with an energy of a few keV may cross it more than 10 times and gain energy in subsequent collisions with the shock and with the turbulence. At present it is difficult to make a clear distinction between the mechanisms of diffusive [4,5] and drift [39] acceleration, but we exclude the whistler and low hybrid wave turbulence [40] as there is no regular magnetic field upstream of the shock. In contrast, the measured spectrum is consistent with the idea of a multipass, first-order Fermi acceleration operating in the shock and assisted by the upstream Weibel turbulence.…”

Section: -2mentioning

confidence: 99%

Collisionless Shocks Driven by Supersonic Plasma Flows with Self-Generated Magnetic Fields

Tikhonchuk

Moreno

et al. 2019

Phys. Rev. Lett.

Self Cite

View full text Add to dashboard Cite

Collisionless shocks are ubiquitous in the Universe as a consequence of supersonic plasma flows sweeping through interstellar and intergalactic media. These shocks are the cause of many observed astrophysical phenomena, but details of shock structure and behavior remain controversial because of the lack of ways to study them experimentally. Laboratory experiments reported here, with astrophysically relevant plasma parameters, demonstrate for the first time the formation of a quasiperpendicular magnetized collisionless shock. In the upstream it is fringed by a filamented turbulent region, a rudiment for a secondary Weibel-driven shock. This turbulent structure is found responsible for electron acceleration to energies exceeding the average energy by two orders of magnitude.

show abstract

Section: -2mentioning

confidence: 99%

Collisionless Shocks Driven by Supersonic Plasma Flows with Self-Generated Magnetic Fields

Tikhonchuk

Moreno

et al. 2019

Phys. Rev. Lett.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Recent PIC simulations conducted by using OSIRIS [23] predicted electron acceleration via lower-hybrid turbulence of while an associated scaled laboratory experiment [22] (with differing electron-ion mass ratio and ion velocity ) demonstrated electron energization to . This new laboratory experiment [22] confirmed that the analytical estimates for the average energy and number density of accelerated electrons (described by the equations above) are in good agreement with the experimental results, as were the numerical simulations [23] . This strengthens the theoretical model describing lower-hybrid electron acceleration at collisionless shocks predicted by a number of authors.…”

Section: Electron Acceleration and Cyclotron-maser Emissionmentioning

confidence: 99%

“…The same model has also been applied successfully to explain energetic particles in artificial releases from spacecraft [18] and the physics of collisionless shocks near lunar magnetic abnormalities [19, 20] and in the globally induced lunar magnetosphere [21] . Recently, this model has been tested in a laser-plasma experiment [22] and successfully modelled by using PIC (particle-in-cell) codes [23] . The escape of cyclotron-maser radiation from a blazar jet has been previously considered in some detail [3, 5] , with various factors debated including second harmonic cyclotron absorption and synchrotron absorption.…”

Section: Introductionmentioning

confidence: 99%

“…From our previous consideration for the terrestrial auroral case [24] , this could result in R-mode like radiation propagating parallel to the magnetostatic field and an associated reduction in cyclotron-wave coupling efficiency for second harmonic absorption at the associated magnetic field resonance. Laboratory astrophysics is an exciting area pioneered by several groups [22, 25–29] . The scaling relationships that allow laboratory experiments to investigate astrophysical phenomena are well established and routinely used to devise laboratory parameter regimes that have astrophysical relevance [30] .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Maser radiation from collisionless shocks: application to astrophysical jets

Speirs

Ronald

Phelps

et al. 2019

High Pow Laser Sci Eng

Self Cite

View full text Add to dashboard Cite

This paper describes a model of electron energization and cyclotron-maser emission applicable to astrophysical magnetized collisionless shocks. It is motivated by the work of Begelman, Ergun and Rees [Astrophys. J. 625, 51 (2005)] who argued that the cyclotron-maser instability occurs in localized magnetized collisionless shocks such as those expected in blazar jets. We report on recent research carried out to investigate electron acceleration at collisionless shocks and maser radiation associated with the accelerated electrons. We describe how electrons accelerated by lower-hybrid waves at collisionless shocks generate cyclotron-maser radiation when the accelerated electrons move into regions of stronger magnetic fields. The electrons are accelerated along the magnetic field and magnetically compressed leading to the formation of an electron velocity distribution having a horseshoe shape due to conservation of the electron magnetic moment. Under certain conditions the horseshoe electron velocity distribution function is unstable to the cyclotron-maser instability [Bingham and Cairns, Phys. Plasmas 7, 3089 (2000); Melrose, Rev. Mod. Plasma Phys. 1, 5 (2017)].

show abstract

“…Such sources are also widely explored in applications in ultrafast spectroscopy [4] , pump-probes in chemistry [5] , condensed matter and optical coherence tomography [6] , among many other fields. Simultaneously, ultra-short, high-energy intense sources enable the study of astrophysical phenomena in laboratories [7] , contribute to advances in several highfield physics topics and are used in particle acceleration schemes [8] .…”

Section: Introductionmentioning

confidence: 99%

Ultra-broadband near-infrared NOPAs based on the nonlinear crystals BiBO and YCOB

Galletti

Pires

Hariton

et al. 2020

High Pow Laser Sci Eng

View full text Add to dashboard Cite

We evaluate and demonstrate ultra-broadband near-infrared noncollinear optical parametric amplification in two nonlinear crystals, bismuth borate (BiBO) and yttrium calcium oxyborate (YCOB), which are not commonly used for this application. The spectral bandwidth is of the microjoule level; the amplified signal is ≥ 200 nm, capable of supporting sub-10 fs pulses. These results, supported by numerical simulations, show that these crystals have a great potential as nonlinear media in both low-energy, few-cycle systems and high peak power amplifiers for terawatt to petawatt systems based on noncollinear optical parametric chirped pulse amplification (NOPCPA) or a hybrid.

show abstract

Electron acceleration by wave turbulence in a magnetized plasma

Cited by 32 publications

References 29 publications

Collisionless Shocks Driven by Supersonic Plasma Flows with Self-Generated Magnetic Fields

Collisionless Shocks Driven by Supersonic Plasma Flows with Self-Generated Magnetic Fields

Maser radiation from collisionless shocks: application to astrophysical jets

Ultra-broadband near-infrared NOPAs based on the nonlinear crystals BiBO and YCOB

Contact Info

Product

Resources

About