An assessment of generating quasi-static magnetic fields using laser-driven “capacitor” coils

Peebles, J.; Davies, J. R.; Barnak, D. H.; García-Rubio, F.; Heuer, Peter; Brent, G.; Spielman, R. B.; Betti, R.

doi:10.1063/5.0096784

Cited by 10 publications

(3 citation statements)

References 56 publications

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“…A different method for creating magnetic fields with laserplasma interactions is through laser-driven coils (Gao et al, 2016;Peebles et al, 2022). In this approach, a laser is used to heat and eject electrons from a plate so that a current is drawn through a loop connected to the plate.…”

Section: A Magnetic-field Generationmentioning

confidence: 99%

Proton imaging of high-energy-density laboratory plasmas

Schaeffer,

Bott,

Borghesi

et al. 2023

Rev. Mod. Phys.

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Proton imaging has become a key diagnostic for measuring electromagnetic fields in high-energydensity (HED) laboratory plasmas. Compared to other techniques for diagnosing fields, proton imaging is a measurement that can simultaneously offer high spatial and temporal resolution and the ability to distinguish between electric and magnetic fields without the protons perturbing the plasma of interest. Consequently, proton imaging has been used in a wide range of HED experiments, from

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Section: A Magnetic-field Generationmentioning

confidence: 99%

Proton imaging of high-energy-density laboratory plasmas

Schaeffer,

Bott,

Borghesi

et al. 2023

Rev. Mod. Phys.

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“…An external magnetic field was applied to the plasma in several shots of the heating experiment. A laser-driven coil [32][33][34] was used to converge the REB and increase heating efficiency [27]. The laser-driven coil consisted of two plates and an attached coil.…”

Section: Experimental Configurationsmentioning

confidence: 99%

Indispensability of Ultra-High-Contrast Heating Lasers for Fast Ignition

Takizawa,

Morace,

Abe

et al. 2023

Preprint

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The enhancement of plasma heating efficiency is important for realizing inertial fusion energy, which follows the ignition achieved with the laser-indirect-drive central-ignition approach. An increase in the relativistic electron beam (REB) generation efficiency, an improvement in REB directivity, and the optimization of REB energy distribution are key for enhancing the heating efficiency in the fast ignition approach using laser-produced REBs. Here, we show that an extreme ultra-high contrast of the heating laser pulse is essential for efficiently heating high-density plasma using the fast-ignition approach of inertial confinement fusion. A heating efficiency enhancement of more than 2 x was obtained with a high-contrast heating laser compared to that obtained with the lower-contrast LFEX laser. The enhanced heating efficiency is ascribed to the significant reduction of the REB divergence and the increased number of electrons injected into the plasma. The interaction between the high-contrast laser and a plasma suppresses excessive acceleration of the REB The high contrast shortens the distance between the REB generation point and the high-density plasma. However, it is clarified that ultra-high contrast reduces the laser absorption fraction, future research on improving laser absorption for high-contrast lasers is required.

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“…Recently, Peebles et al [37] conducted comprehensive experiments to evaluate the capability of laserdriven coils in generating magnetic field by using various diagnostic methods mentioned above. As a conclusion, it has been found that the laser driven coils do not perform as claimed, failed to produce quasi-static kilotesla-level magnetic fields and are not applicable for the majority of current experiments where it is beneficial to have a field.…”

Section: Introductionmentioning

confidence: 99%

A new capacitive inductive system design for LASER-induced kilotesla magnetic field generation

Akay,

Varol,

Kurt

2024

Journal of Energy Systems

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This research focuses on exploring the nanosecond laser-driven coil systems capable of generating kT magnetic fields and the diverse applications of this system. Through investigating the effects of laser parameters and coil structures, the aim of this study is to unveil the physics of these generated intense magnetic fields. The outcomes gained from this research give an important and fundamental understanding on high magnetic field production, informing the development in laser-driven systems. The implications of this study extend to plasma physics, astrophysics simulations and fusion research. Furthermore, the study explains the advantages and applications of these intense magnetic fields and includes measurements of laser pulse powers according to coil materials.

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An assessment of generating quasi-static magnetic fields using laser-driven “capacitor” coils

Cited by 10 publications

References 56 publications

Proton imaging of high-energy-density laboratory plasmas

Proton imaging of high-energy-density laboratory plasmas

Indispensability of Ultra-High-Contrast Heating Lasers for Fast Ignition

A new capacitive inductive system design for LASER-induced kilotesla magnetic field generation

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