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HEPP Seminar Winter 25/26 #10: A. Moreau / J. Toudic / M. Salerno

→ Europe/Berlin
HGW-SR2 / GAR-D3-1309

HGW-SR2 / GAR-D3-1309
Daniel Told (IPP-Garching), René Bussiahn (IPP Bereich Greifswald)
Description

https://eu02web.zoom-x.de/j/63778308490?pwd=UmmdpAfwf3LhqmoQO9MbTjVYN3kW14.1

 

ID: 637 7830 8490

Code: 492343
 
HEPP Seminar
Participants
  • Daniel Told
  • René Bussiahn
    • 16:00 → 16:30
      A. Moreau (P): Density dynamics of shattered pellet injection using a dispersion interferometer 30m

      High-current tokamaks contain a severe risk from unmitigated disruptions. Loss of plasma confinement in these scenarios could lead to excessive heat and force loads on a reactor and create runaway electron beams capable of causing intense localized damage inside the device. Shattered pellet injection is a promising candidate for disruption mitigation, controlling the thermal and current quenches during an unavoidable disruption. The core density evolution following injected hydrogenic and neon-doped hydrogenic fragments is a key indicator of the disruption mitigation effectiveness.

      A project has been underway to install and commission a new interferometer diagnostic at ASDEX Upgrade. This diagnostic provides line-integrated electron density measurements at high time resolutions, free of vibrational errors and containing significantly reduced risk of fringe jump uncertainty. Results from SPI experiments during the 2025 campaign show how a small quantity of neon doping in a deuterium shattered pellet injection can result in significantly higher density retention at much later phases in the current quench. Furthermore, the multiple pellet injection schemes have been shown to achieve high densities while lengthening the duration of the pre-thermal quench.

      Speaker: Andrew Moreau (IPP-Garching)
      260112_spi_with_di_at_aug_hepp_progress.pptx
    • 16:30 → 16:45
      J. Toudic (I): Study of neoclassical physics and turbulence in the stellarator edge with the gyrokinetic code GENE-X 15m
      Speaker: Jared Toudic
      HEPPIntro.pptx
    • 16:45 → 17:00
      M. Salerno (I): Impact of RMPs on plasma rotation in ASDEX Upgrade 15m
      Speaker: Margherita Salerno
      HEPP_introduction_talk_final_2.pptx