Measurements of the Growth and Saturation of Electron Weibel Instability in Optical-Field Ionized Plasmas

Zhang, Chaojie; Hua, Jianfei; Wu, Yipeng; Fang, Yu; Ma, Yue; Zhang, Tianliang; Liu, Shuang; Peng, Bo; He, Yunxiao; Huang, C.; Marsh, Ken; Mori, W. B.; Lü, Wei; Joshi, C.

doi:10.1103/physrevlett.125.255001

Cited by 24 publications

(18 citation statements)

References 45 publications

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“…In principle, the scheme could also be tested with near-infrared lasers, as long as higher densities are used. Finally, we note that the proposed setup allows for the electron Weibel instability to be probed in a fully collisionless regime in the laboratory, similarly to what has previously been done for the ion Weibel instability [7,75,76] and would complement the experiments of Zhang et al, which explore the growth and saturation of the electron Weibel instability in a collisional non-relativistic regime [59,60].…”

Section: Discussionmentioning

confidence: 60%

Interaction between electrostatic collisionless shocks generates strong magnetic fields

et al. 2022

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The head-on collision between electrostatic shocks is studied via multi-dimensional Particle-In-Cell simulations. A strong magnetic field develops after the interaction, which causes the shock velocities to drop significantly. This transverse magnetic field is generated by the Weibel instability, which is driven by pressure anisotropies due to longitudinal electron heating while the shocks approach each other. The possibility to explore the physics underpinning the shock collision in the laboratory with current laser facilities is discussed.

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Section: Discussionmentioning

confidence: 60%

Interaction between electrostatic collisionless shocks generates strong magnetic fields

et al. 2022

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“…Strong field ionization is the very first step of many interesting phenomena in atomic, molecular and optical physics such as above-threshold-ionization (ATI), high-order harmonic generation (HHG), nonsequential ionization (NSI) and spin-dependent ionization. In addition, optical field ionization of dense gases produces plasmas that can be an ideal platform for studying various plasma kinetic instabilities [43,44], coupling of orbital angular momentum to plasmas [45], generation of self-magnetized plasmas with spin-polarized electrons etc. We believe that ionization gratings could become a very powerful platform for studying these effects.…”

Section: Absolute Measurements Of Ionization Degree Of Plasma Grating...mentioning

confidence: 99%

Ionization induced plasma grating and its applications in strong-field ionization measurements

Zhang¹,

Nie²,

Wu³

et al. 2021

Plasma Phys. Control. Fusion

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An ionization induced plasma grating can be formed by spatially selective ionization of gases by the interference of two intersecting ultra-short laser pulses. The density modulation of a plasma grating can approach unity since the plasma is produced only where the two pulses constructively interfere and ionization does not occur in destructive interference regions. Such a large density modulation leads to efficient Thomson scattering of a second ultra-short probe pulse once the Bragg condition is satisfied. By measuring the scattering efficiency, it is possible to determine the absolute electron density in the plasma grating and thereby deduce the ionization degree for a given neutral gas density. In this paper, we demonstrate the usefulness of this concept by showing two applications: ionization degree measurement of strong-field ionization of atoms and molecules and characterization of extremely low-density gas jets. The former application is of particular interest for ionization physics studies in dense gases where the collision of the ionized electron with neighboring neutrals may become important-sometimes referred to as many-body ionization; and the latter is useful for plasma-based acceleration that requires extremely low-density plasmas.

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“…Both instabilities grow simultaneously in OFI plasmas. The existence of kinetic instabilities in plasma has already been discussed in theoretical work 24 and relatively few laboratory verifications 16,17,[25][26][27][28][29] . It is shown that Weibel instability in microwave-produced plasma is purely transverse (k.E = 0) and aperiodic mode 11,12 , however, for the optical breakdown in weakly relativistic regime the Weibel instability is an oscillating mode (Weibel-like) 13 .…”

Section: Introductionmentioning

confidence: 99%

“…Although the CF instability is usually known with the Weibel instability, the filamentation mode is transverse provided both beams are strictly identical. The Weibel instability are thought to occur in fundamental phenomena such as gamma-ray burst 3 , collisionless shocks 4 , solar corona and interplanetary medium 5 , trapped solar wind in ionosphere by Earth's magnetic field 6,7 , neutrino-plasma interaction 8 , quark-gluon plasmas 9,10 , microwave gas discharge 11,12 , optical breakdown 13,[16][17][18] , fast ignition scenario of initial confinement fusion 19 and megagauss magnetic field generation in laser-plasma interaction 20,21 . In a sufficiently strong electric field, electrons move relative to motionless ions with a velocity much greater than their thermal velocity.…”

Section: Introductionmentioning

confidence: 99%

Stream instabilities in optical-field ionization of a monatomic dilute neutral gas in fully relativistic regime

Ghorbanalilu

2022

Preprint

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Stream instabilities arising from anisotropic electron velocity distribution function (EVDF) are discussed in the optical-field ionization mechanism of a monatomic dilute gas by a circularly polarized laser beam in a fully relativistic regime. It is shown that a relativistically rotating electron beam is derived by a circularly polarized laser field with (pz>p⟂). We show that the following ionization and before than collisions thermalize the electrons, the plasma undergoes Buneman and Weibel instabilities. The Weibel and Buneman modes are co-propagating with $k$ normal to the streaming direction. The theoretical results reveal that for the threshold of the relativistic regime (a0\≈1), instabilities are aperiodic and grow independently. However, by increasing the laser intensity for a0>1, two instabilities are coupled. The coupling process increases the growth rate of Weibel instability, while the Buneman instability experiences a decrement in growth rate. For more intense laser radiation, both instabilities are broken into different oscillatory and aperiodic modes.

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Measurements of the Growth and Saturation of Electron Weibel Instability in Optical-Field Ionized Plasmas

Cited by 24 publications

References 45 publications

Interaction between electrostatic collisionless shocks generates strong magnetic fields

Interaction between electrostatic collisionless shocks generates strong magnetic fields

Ionization induced plasma grating and its applications in strong-field ionization measurements

Stream instabilities in optical-field ionization of a monatomic dilute neutral gas in fully relativistic regime

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