The effect of pellet injection on turbulent transport in TJ-II

García, L.; García-Cortés, I.; Carreras, B. A.; McCarthy, K. J.; van Milligen, B. Ph.

doi:10.1063/5.0163832

Title: The effect of pellet injection on turbulent transport in TJ-II

Journal Article · 31 August 2023 · Physics of Plasmas

DOI: https://doi.org/10.1063/5.0163832 · OSTI ID:2420700

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OSTI

An improvement in confinement associated with the injection of pellets has been observed in TJ-II and other devices. By means of a simple model, we study here the modification of turbulent transport by the injection of pellets in TJ-II and how this modification affects the particle confinement time. The analysis of the results shows the relationship of the confinement improvement with the evolution of the shear flow due to turbulence, especially near low order rational surfaces. This work is based on pellet injections into the neutral beam injection heated phase of TJ-II plasmas. For this, single, double, or triple hydrogen pellet injection are considered and the post-injection evolution of selected plasma parameters are analyzed and compared.

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Research Organization:: Univ. of Alaska, Fairbanks, AK (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: TJ-II Team

Grant/Contract Number:: SC0018076

OSTI ID:: 2420700

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 30; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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