Theoretical astrophysics and plasma physics at RPC

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Collisionless whistler heat-flux instability in ultra-high-$β$ plasmas

(2026)

Authors:

Rhisiart Davies, Prakriti Pal Choudhury, Archie FA Bott
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Transport in high-performance plasmas of the TJ-II stellarator: From first-principles simulations to experimental validation

Nuclear Fusion IOP Publishing (2026)

Authors:

José Manuel García-Regaña, Daniel Alegre, Arturo Alonso, Régulo Anton, Enrique Ascasibar, Alfonso Baciero, Alejandro Banon Navarro, Jose-Miguel Barcala, Michael Barnes, M Scherezade Barquero Balsera, Emilio Blanco, Matthias Borchardt, Luis Alberto Bueno, Andres De Bustos, Santiago Cabrera, Alfonso de Castro, Teresa Estrada, Alvaro Cappa, Nerea Panadero, Isabel Garcia-Cortes, Ivan Calvo, Daniel Carralero, Kieran McCarthy, Jose Luis Velasco, Marcos Arranz Jiménez

Abstract:

Abstract We provide an overview of activities carried out at the TJ-II stellarator aimed at understanding transport from first principles and power balance analysis. These tasks include gyrokinetic simulations with the codes stella and EUTERPE, neoclassical simulations with the code SFINCS, particle deposition calculations with the code HPI2, and heat source estimates with ASCOT5. All these numerical simulation efforts converge, together with transport analyses, to address the transport mechanisms in plasmas with improved confinement through pellet injection—a scenario studied during the past few TJ-II campaigns bearing resemblance to the pellet-fueled high-performance plasma scenarios of observed in W7-X.
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Zonal-flow generation and saturation of electromagnetic ion-scale turbulence in tokamaks

(2026)

Authors:

Y Zhang, T Adkins, M Barnes, AV Dudkovskaia, MR Hardman, PG Ivanov, D Kennedy, AA Schekochihin

On the generation of astrophysically-relevant intermittent magnetic turbulence in the laboratory

(2026)

Authors:

Itamar Cohen, Weipeng Yao, Archie FA Bott, Sophia N Chen, Nikola Mirkovic, Jerome Beard, Petrisor Gabriel Bleotu, Georgiana Giubegal, Anda-Maria Talposi, Yoav Heller, Clement Lacoste, Patrizio Antici, Damiano Caprioli, Emmanuel DHumieres, Victor Malka, Alexandre Marcowith, Ovidiu Tesileanu, Mateusz Ruszkowski, Philipp Kempski, Olga Alexandrova, Julien Fuchs
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Properties of black hole mergers in disks of active galactic nuclei

(2026)

Authors:

Hiromichi Tagawa, Zoltán Haiman, Bence Kocsis
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