Measuring magnetic flux suppression in high-power laser-plasma interactions

P. T. Campbell; C. A. Walsh; B. K. Russell; J. P. Chittenden; A. Crilly; G. Fiksel; L. Gao; I. V. Igumenshchev; P. M. Nilson; A. G.R. Thomas; K. Krushelnick; L. Willingale

doi:10.1063/5.0062717

Measuring magnetic flux suppression in high-power laser-plasma interactions

P. T. Campbell, C. A. Walsh, B. K. Russell, J. P. Chittenden, A. Crilly, G. Fiksel, L. Gao, I. V. Igumenshchev, P. M. Nilson, A. G.R. Thomas, K. Krushelnick, L. Willingale

PPPL Discovery Plasma Science

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Biermann battery magnetic field generation driven by high power laser-solid interactions is explored in experiments performed with the OMEGA EP laser system. Proton deflectometry captures changes to the strength, spatial profile, and temporal dynamics of the self-generated magnetic fields as the target material or laser intensity is varied. Measurements of the magnetic flux during the interaction are used to help validate extended magnetohydrodynamic (MHD) simulations. Results suggest that kinetic effects cause suppression of the Biermann battery mechanism in laser-plasma interactions relevant to both direct and indirect-drive inertial confinement fusion. Experiments also find that more magnetic flux is generated as the target atomic number is increased, which is counter to a standard MHD understanding.

Original language	English (US)
Article number	012701
Journal	Physics of Plasmas
Volume	29
Issue number	1
DOIs	https://doi.org/10.1063/5.0062717
State	Published - Jan 1 2022

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1063/5.0062717

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abstract = "Biermann battery magnetic field generation driven by high power laser-solid interactions is explored in experiments performed with the OMEGA EP laser system. Proton deflectometry captures changes to the strength, spatial profile, and temporal dynamics of the self-generated magnetic fields as the target material or laser intensity is varied. Measurements of the magnetic flux during the interaction are used to help validate extended magnetohydrodynamic (MHD) simulations. Results suggest that kinetic effects cause suppression of the Biermann battery mechanism in laser-plasma interactions relevant to both direct and indirect-drive inertial confinement fusion. Experiments also find that more magnetic flux is generated as the target atomic number is increased, which is counter to a standard MHD understanding.",

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AU - Campbell, P. T.

AU - Walsh, C. A.

AU - Russell, B. K.

AU - Chittenden, J. P.

AU - Crilly, A.

AU - Fiksel, G.

AU - Gao, L.

AU - Igumenshchev, I. V.

AU - Nilson, P. M.

AU - Thomas, A. G.R.

AU - Krushelnick, K.

AU - Willingale, L.

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AB - Biermann battery magnetic field generation driven by high power laser-solid interactions is explored in experiments performed with the OMEGA EP laser system. Proton deflectometry captures changes to the strength, spatial profile, and temporal dynamics of the self-generated magnetic fields as the target material or laser intensity is varied. Measurements of the magnetic flux during the interaction are used to help validate extended magnetohydrodynamic (MHD) simulations. Results suggest that kinetic effects cause suppression of the Biermann battery mechanism in laser-plasma interactions relevant to both direct and indirect-drive inertial confinement fusion. Experiments also find that more magnetic flux is generated as the target atomic number is increased, which is counter to a standard MHD understanding.

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Measuring magnetic flux suppression in high-power laser-plasma interactions

Abstract

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