Study of the intermittent plasma structure around the divertor simulation experimental module in GAMMA 10/PDX

Tanaka, Hirohiko; Ezumi, N.; Sugiyama, Tsukasa; Gamo, H.; Shigematsu, Naoyuki; Yoshikawa, Masayuki; Kohagura, J.; Hirata, M.; Togo, S.; Ohno, Noriyasu; Sakamoto, M.

doi:10.1063/5.0129886

Cited by 3 publications

(3 citation statements)

References 30 publications

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“…The detached recombination process was simulated using the fluid simulation code LINDA considering collisional radiative dielectric recombination [38]. The complex detaching plasma transport was modeled using the feedback instability in the plasma density and the effect of the magnetic flux [39]. A toroidal configuration was tested for detaching plasma at the vacuum vessel wall by cooling the electron temperature as high-density plasma is transported along long spiral magnetic fields [40][41][42][43].…”

Section: Recombining Detached Plasmamentioning

confidence: 99%

Plasma-Driven Sciences: Exploring Complex Interactions at Plasma Boundaries

Ishikawa,

Koga,

Ohno

2024

Plasma

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Plasma-driven science is defined as the artificial control of physical plasma-driven phenomena based on complex interactions between nonequilibrium open systems. Recently, peculiar phenomena related to physical plasma have been discovered in plasma boundary regions, either naturally or artificially. Because laboratory plasma can be produced under nominal conditions around atmospheric pressure and room temperature, phenomena related to the interaction of plasma with liquid solutions and living organisms at the plasma boundaries are emerging. Currently, the relationships between these complex interactions should be solved using science-based data-driven approaches; these approaches require a reliable and comprehensive database of dynamic changes in the chemical networks of elementary reactions. Consequently, the elucidation of the mechanisms governing plasma-driven phenomena and the discovery of the latent actions behind these plasma-driven phenomena will be realized through plasma-driven science.

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Section: Recombining Detached Plasmamentioning

confidence: 99%

Plasma-Driven Sciences: Exploring Complex Interactions at Plasma Boundaries

Ishikawa,

Koga,

Ohno

2024

Plasma

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“…Currently, only a few devices are available to simulate the divertor parameters or heat load in an ITERlike manner, e.g., Magnum-PSI, [2][3][4] Proto-MPEX, [9,10] and GAMMA10/PDX. [13,14] Recently, HIT-PSI, a linear plasma device with tesla magnetic confinement, has been developed at the Harbin Institute of Technology, [15] as depicted in Fig. 1.…”

Section: Introduction and Device Descriptionmentioning

confidence: 99%

Numerical studies for plasmas of a linear plasma device HIT-PSI with geometry modified SOLPS-ITER

Wang 王,

Nie 聂,

Huang 黄

et al. 2024

Chinese Phys. B

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The HIT-PSI is a linear plasma device built for physically simulating the high heat flux environment of future reactor divertors to test/develop advanced target plate materials. In this study, the geometry modified SOLPS-ITER program is employed to examine the effects of the magnetic field strength and neutral pressure in the device on the heat flux experienced by the target plate of the HIT-PSI device. The findings of the numerical simulation indicate a positive correlation between the magnetic field strength and the heat flux density. Conversely, there is a negative correlation observed between the heat flux density and the neutral pressure. When the magnetic field strength at the axis exceeds 1 tesla and the neutral pressure falls below 10 Pa, the HIT-PSI has the capability to attain a heat flux of 10MV·m-2 at the target plate. The simulation results offer a valuable point of reference for subsequent experiments at HIT-PSI.

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“…Similar phenomena were also observed in RF plasma sources, PANTA, 19) VINETA 20,21) and in the loss-cone of the GAMMA10/PDX mirror machine. 22) Early stages of these are reviewed in Ref. 23.…”

Section: Introductionmentioning

confidence: 99%

Structure of intermittent variation of floating potential in a converging field following a magnetic beach ECR plasma source

Okamoto

Higuchi

Yamada

et al. 2023

Jpn. J. Appl. Phys.

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In converging field configuration of cylindrical plasma following electron cyclotron resonance plasma source, intermittent variation of floating potential, which is a negative spike with about ten microsecond duration, is observed. The event is ubiquitous; independent of measurement position and magnetic field. Cross correlation analysis for two floating potentials at separate positions reveals that strong correlation exists within the event timescale. The correlation along the magnetic field line suggests axially elongated structure. Radial extent of the structure is clarified by the radial correlation profile. Different FWHM of the radial profile at the plasma production region and the downstream converging field region is essentially explained by field line tracing.

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Study of the intermittent plasma structure around the divertor simulation experimental module in GAMMA 10/PDX

Cited by 3 publications

References 30 publications

Plasma-Driven Sciences: Exploring Complex Interactions at Plasma Boundaries

Plasma-Driven Sciences: Exploring Complex Interactions at Plasma Boundaries

Numerical studies for plasmas of a linear plasma device HIT-PSI with geometry modified SOLPS-ITER

Structure of intermittent variation of floating potential in a converging field following a magnetic beach ECR plasma source

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