Tungsten Melt Losses under QSPA Kh-50 Plasma Exposures Simulating ITER ELMs and Disruptions

Garkusha, I.E.; Makhlai, V.А.; Aksenov, N.N.; Базылев, Б.; Landman, I.; Sadowski, M.; Składnik‐Sadowska, E.

doi:10.13182/fst13-668

Cited by 34 publications

(38 citation statements)

References 20 publications

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“…2c and Fig. 2d ).This decrease could be attributed to the growing size of the droplets ejected [11] from mountains of the re-solidified material on the edge of target and bridges between elements of castellated structure (Fig. 1 b).…”

Section: Exposures Of a Target With Normal Incidence Of The Plasma Flowmentioning

confidence: 90%

“…Experimental simulations of ITER transient events with relevant surface heat load parameters (energy density and the pulse duration) as well as particle loads were carried out with a quasi-stationary plasma accelerator QSPA Kh-50 [6,[9][10][11][12] that is largest and most powerful device of its kind. The main parameters of the hydrogen plasma streams are as follows: ion impact energy about 0.4 keV, maximum plasma pressure 0.32 MPa, and the stream diameter 18 cm.…”

Section: Methodsmentioning

confidence: 99%

“…As on observations of plasma interactions with exposed surfaces, the dust particle dynamics and the droplets monitoring were performed with a high-speed 10 bit CMOS pco.1200 s digital camera PCO AG [11]. Optical methods of diagnostics were used for determination of the main plasma parameters (electron density and temperature) and studies of the impurity behavior during the time of discharge.…”

Section: Methodsmentioning

confidence: 99%

“…Velocities of ejected particles have been evaluated from the lengths of their traces in selected frame. The moment when the particle was released from the target surface could be calculated also [11]. The dependencies of number of emitted droplets and their velocity v.s the start time of the plasma-surface are plotted.…”

Section: Exposures Of a Target With Normal Incidence Of The Plasma Flowmentioning

confidence: 99%

See 3 more Smart Citations

Damage of target edges in brush-like geometry in the course of ELM-like plasma pulses in QSPA Kh-50

Makhlaj

Garkusha

Aksenov

et al. 2015

Journal of Nuclear Materials

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Section: Exposures Of a Target With Normal Incidence Of The Plasma Flowmentioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Exposures Of a Target With Normal Incidence Of The Plasma Flowmentioning

confidence: 99%

See 2 more Smart Citations

Damage of target edges in brush-like geometry in the course of ELM-like plasma pulses in QSPA Kh-50

Makhlaj

Garkusha

Aksenov

et al. 2015

Journal of Nuclear Materials

Self Cite

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“…Therefore, different constructional materials have been irradiated within various plasma machines in many laboratories [2][3][4][5][6]. Among different materials, applied in various plasma experimental facilities, samples made of carbon fi bre composite (CFC), which was often used in older plasma magnetic--confi nement devices, were also investigated.…”

Section: Introductionmentioning

confidence: 99%

Research on interactions of plasma streams with CFC targets in the Rod Plasma Injector facility

et al. 2016

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Abstract. This paper present results of optical spectroscopy studies of interactions of intense plasma streams with a solid target made of carbon fi bre composite (CFC). The experiments were carried out within the Rod Plasma Injector (RPI) IBIS facility. The optical measurements were performed fi rst for a freely propagating plasma stream in order to determine the optimal operational parameters of this facility. Optical emission spectra (OES) were recorded for different operational modes of the RPI IBIS device, and spectral lines were identifi ed originating from the working gas (deuterium) as well as some lines from the electrode material (molybdenum). Subsequently, optical measurements of plasma interacting with the CFC target were performed. In the optical spectra recorded with the irradiated CFC samples, in addition to deuterium and molybdenum lines, many carbon lines, which enabled to estimate erosion of the investigated targets, were recorded. In order to study changes in the irradiated CFC samples, their surfaces were analysed (before and after several plasma discharges) by means of scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) techniques. The analysis of the obtained SEM images showed that the plasma irradiation induces noticeable changes in the surface morphology, for example vaporisation of some carbon fi bres and formation of microcracks. The obtained EDS images showed that upon the irradiated target surface, some impurity ions are also deposited, particularly molybdenum ions from the applied electrodes.

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Dust and powder in fusion plasmas: recent developments in theory, modeling, and experiments

Ratynskaia

Bortolon

Krasheninnikov

2022

Rev. Mod. Plasma Phys.

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In this paper, we present a brief historic overview of the research on dust in fusion devices with carbon plasma-facing components and then highlight the most recent developments in the post-carbon era of the field. In particular, we consider how the metallic dust form, mobilize, and interact with fusion plasmas and plasma facing components. Achievements in wall conditioning and associated anomalous plasma transport modification, including ELM suppression, with the powder injection technique is another focus of the paper. Capabilities of the state-of-art simulation tools to describe different aspects of dust in fusion devices are exemplified and new directions for future dust studies are brought forward.

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Tungsten Melt Losses under QSPA Kh-50 Plasma Exposures Simulating ITER ELMs and Disruptions

Cited by 34 publications

References 20 publications

Damage of target edges in brush-like geometry in the course of ELM-like plasma pulses in QSPA Kh-50

Damage of target edges in brush-like geometry in the course of ELM-like plasma pulses in QSPA Kh-50

Research on interactions of plasma streams with CFC targets in the Rod Plasma Injector facility

Dust and powder in fusion plasmas: recent developments in theory, modeling, and experiments

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