Extremely intense laser-based electron acceleration in a plasma channel

Vranić, Marija; Fonseca, Ricardo; Silva, Luı́s O.

doi:10.1088/1361-6587/aaa36c

Cited by 38 publications

(32 citation statements)

References 61 publications

(93 reference statements)

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“…One such simulation showing the energy increase due to the radiation friction is presented in ref. 61 . PIC simulations are also required to make predictions for specific laser and target parameters.…”

Section: Summary and Discussionmentioning

confidence: 99%

Radiation reaction as an energy enhancement mechanism for laser-irradiated electrons in a strong plasma magnetic field

Gong

Mackenroth

Yan

et al. 2019

Sci Rep

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Conventionally, friction is understood as a mechanism depleting a physical system of energy and as an unavoidable feature of any realistic device involving moving parts. In this work, we demonstrate that this intuitive picture loses validity in nonlinear quantum electrodynamics, exemplified in a scenario where spatially random friction counter-intuitively results in a highly directional energy flow. This peculiar behavior is caused by radiation friction, i.e., the energy loss of an accelerated charge due to the emission of radiation. We demonstrate analytically and numerically how radiation friction can dramatically enhance the energy gain by electrons from a laser pulse in a strong magnetic field that naturally arises in dense laser-irradiated plasma. We find the directional energy boost to be due to the transverse electron momentum being reduced through friction whence the driving laser can accelerate the electron more efficiently. In the considered example, the energy of the laser-accelerated electrons is enhanced by orders of magnitude, which then leads to highly directional emission of gamma-rays induced by the plasma magnetic field.

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Section: Summary and Discussionmentioning

confidence: 99%

Radiation reaction as an energy enhancement mechanism for laser-irradiated electrons in a strong plasma magnetic field

Gong

Mackenroth

Yan

et al. 2019

Sci Rep

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“…If the target is close to underdense, by contrast, the laser can propagate through the plasma bulk and the interaction is volumetric in nature. The combination of laser and induced plasma fields, as well as radiation reaction, leads to confinement and acceleration of the electrons, and copious emission of radiation [141][142][143].…”

Section: A Geometriesmentioning

confidence: 99%

Radiation reaction in electron–beam interactions with high-intensity lasers

Blackburn

2020

Rev. Mod. Plasma Phys.

123

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Charged particles accelerated by electromagnetic fields emit radiation, which must, by the conservation of momentum, exert a recoil on the emitting particle. The force of this recoil, known as radiation reaction, strongly affects the dynamics of ultrarelativistic electrons in intense electromagnetic fields. Such environments are found astrophysically, e.g. in neutron star magnetospheres, and will be created in laser-matter experiments in the next generation of high-intensity laser facilities. In many of these scenarios, the energy of an individual photon of the radiation can be comparable to the energy of the emitting particle, which necessitates modelling not only of radiation reaction, but quantum radiation reaction. The worldwide development of multi-petawatt laser systems in large-scale facilities, and the expectation that they will create focussed electromagnetic fields with unprecedented intensities > 10 23 Wcm −2 , has motivated renewed interest in these effects. In this paper I review theoretical and experimental progress towards understanding radiation reaction, and quantum effects on the same, in high-intensity laser fields that are probed with ultrarelativistic electron beams. In particular, we will discuss how analytical and numerical methods give insight into new kinds of radiation-reaction-induced dynamics, as well as how the same physics can be explored in experiments at currently existing laser facilities.

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“…The transversely expelled electrons generate the radial electric field, while electrons accelerated forward within the channel form a current that generates the azimuthal magnetic field. Usually, the higher the background plasma density, the lower the value of f [44]. In other words, the channel fields are linearly dependent on a radial distance from the channel axis, but the electric field E C and the magnetic field B C do not necessarily have the same magnitude.…”

Section: Integral Of Motion In Simplified Electromagnetic Configurationmentioning

confidence: 99%

“…One way to contribute is through allowing particle trapping near the channel axis in situations where all electrons would be expelled if no radiation was emitted. The trapped electrons interact with the peak laser intensity and can potentially achieve multi-GeV energies [43][44][45]. Another way to contribute is through the change of resonant conditions.…”

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confidence: 99%

Scaling laws for direct laser acceleration in a radiation-reaction dominated regime

et al. 2020

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We study electron acceleration within a sub-critical plasma channel irradiated by an ultra-intense laser pulse (a0 > 100 or I > 10 22 W/cm 2). In this regime, radiation reaction significantly alters the electron dynamics. This has an effect not only on the maximum attainable electron energy but also on the phase-matching process between betatron motion and electron oscillations in the laser field. Our study encompasses analytical description, test-particle calculations and 2-dimensional particlein-cell simulations. We show single-stage electron acceleration to multi-GeV energies within a 0.5 mm-long channel and provide guidelines how to obtain energies beyond 10 GeV using optimal initial configurations. We present the required conditions in a form of explicit analytical scaling laws that can be applied to plan the future electron acceleration experiments.

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Extremely intense laser-based electron acceleration in a plasma channel

Cited by 38 publications

References 61 publications

Radiation reaction as an energy enhancement mechanism for laser-irradiated electrons in a strong plasma magnetic field

Radiation reaction as an energy enhancement mechanism for laser-irradiated electrons in a strong plasma magnetic field

Radiation reaction in electron–beam interactions with high-intensity lasers

Scaling laws for direct laser acceleration in a radiation-reaction dominated regime

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