An investigation of shock formation vs shock mitigation of colliding plasma jets

Cagas, Petr; Juno, James; Hakim, Ammar; LaJoie, Andrew; Chu, Feng; Langendorf, Samuel; Srinivasan, Bhuvana

doi:10.1063/5.0135389

Title: An investigation of shock formation vs shock mitigation of colliding plasma jets

Journal Article · 01 May 2023 · Physics of Plasmas

DOI: https://doi.org/10.1063/5.0135389 · OSTI ID:1995166

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Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Here, this work studies the interaction between colliding plasma jets to understand regimes in which jet merging results in shock formation vs regimes in which the shock formation is mitigated due to the collisionless interpenetration of the jets. A kinetic model is required for this study because fluid models will always produce a shock upon the collision of plasma jets. The continuum-kinetic, Vlasov–Maxwell–Dougherty model with one velocity dimension is used to accurately capture shock heating, along with a novel coupling with a moment equation to evolve perpendicular temperature for computational efficiency. As a result, this relatively inexpensive simulation can be used for detailed scans of the parameter space toward predictions of shocked vs shock-mitigated regimes, which is of interest for several fusion concepts such as plasma-jet-driven magneto-inertial fusion, high-energy-density plasmas, astrophysical phenomena, and other laboratory plasmas. The initial results obtained using this approach are in agreement with the preliminary outcomes of the plasma liner experiment.

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Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AR0001263; 89233218CNA000001

OSTI ID:: 1995166

Alternate ID(s):: OSTI ID: 2406663

Report Number(s):: LA-UR-24-23721; TRN: US2405031

Journal Information:: Physics of Plasmas, Vol. 30, Issue 5; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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