Performance of deformed tungsten under ELM-like plasma exposures in QSPA Kh-50

Garkusha, I.E.; Landman, I.; Linke, J.; Makhlaj, V.A.; Medvedev, А. V.; Malykhin, S.V.; Peschanyi, S.; Pintsuk, G.; Pugachev, A. T.; Tereshin, V.I.

doi:10.1016/j.jnucmat.2010.11.047

Cited by 57 publications

(24 citation statements)

References 10 publications

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“…That means the tensile strength T of the sample is nearly equal to R at the cracking threshold and this T value corresponds to the final temperature. The measured value R = 380-300 MPa in the temperature interval 200-600 • C approximately 20% less than T (T) of the annealed tungsten [5] because of the stress relaxation due to the cracks. The residual stress without cracks is independent of the initial target temperature.…”

Section: Stress Simulation and Analysismentioning

confidence: 81%

“…A dedicated series of experiments has been performed in the QSPA-Kh50 plasma gun [3,4]. The main plasma parameters are as follows: the ion energy is about 0.4 keV, maximum plasma pressure 3.2 bar and the plasma stream diameter 18 cm.…”

Section: Experimental Conditions and Resultsmentioning

confidence: 99%

“…In the QSPA-Kh50 facility the characteristic depth of the heated layer is ∼100 m, so the compressive thermostress arises due to thermal expansion of this layer. Tungsten linear expansion at 1800 K is 0.65% [5], so the thermostress maximum at the sample surface is ∼2 GPa for this case. This value is much larger than the yield strength, Y = 150 MPa so plastic deformation of the layer starts: it stretched perpendicular to the surface and shrink along of the layer.…”

Section: Stress Simulation and Analysismentioning

confidence: 86%

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Simulation of residual thermostress in tungsten after repetitive ELM-like heat loads

Pestchanyi

Garkusha

Landman

2011

Fusion Engineering and Design

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Section: Stress Simulation and Analysismentioning

confidence: 81%

Section: Experimental Conditions and Resultsmentioning

confidence: 99%

Section: Stress Simulation and Analysismentioning

confidence: 86%

See 1 more Smart Citation

Simulation of residual thermostress in tungsten after repetitive ELM-like heat loads

Pestchanyi

Garkusha

Landman

2011

Fusion Engineering and Design

Self Cite

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“…These occasions show diverse pulses of thermal flux which extents and vitality discharge scales, individually [10]. There are a lot of trial reports on the negative effect of thermal shocks on the microstructural features of tungstenbased materials [3][4][5][6]11]. Normally, a powerful electron or plasma beam is utilized to recreate transient shocks within short pulses of time.…”

Section: Introductionmentioning

confidence: 99%

Modelling Thermal Shock Based Cracking Behaviour of Armour Material for Fusion Reactor

Rai

2017

Asian J Pharm Clin Res

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Objective: This study presents a computational model for studying the mechanical effects of thermal shock over armor material used for fusion reactor. Methods:The simulation study comprises transient thermal shocks over the bulk substance for 1 ms. Result and Conclusion:Latter on the cracking behavior is predicted by extending the virtual crack growth for screening out the efficacy of the used material and its composition.

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“…[11][12][13] The most common mode of operation of the coaxial plasma accelerator occurs when the process gases are introduced to the accelerator before the initiation of breakdown. In this socalled "snowplow" mode, a current sheet is formed upon breakdown and propagates along the length of the accelerator due to J Â B forces, propelling both the ionized gases and the neutral gases in front of the sheet to high velocities.…”

Section: Introductionmentioning

confidence: 99%

A Thomson-type mass and energy spectrometer for characterizing ion energy distributions in a coaxial plasma gun operating in a gas-puff mode

2013

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Measurements of ion energy distribution are performed in the accelerated plasma of a coaxial electromagnetic plasma gun operating in a gas-puff mode at relatively low discharge energy (900 J) and discharge potential (4 kV). The measurements are made using a Thomson-type mass and energy spectrometer with a gated microchannel plate and phosphor screen as the ion sensor. The parabolic ion trajectories are captured from the sensor screen with an intensified charge-coupled detector camera. The spectrometer was designed and calibrated using the Geant4 toolkit, accounting for the effects on the ion trajectories of spatial non-uniformities in the spectrometer magnetic and electric fields. Results for hydrogen gas puffs indicate the existence of a class of accelerated protons with energies well above the coaxial discharge potential (up to 24 keV). The Thomson analyzer confirms the presence of impurities of copper and iron, also of relatively high energies, which are likely erosion or sputter products from plasma-electrode interactions. V C 2013 AIP Publishing LLC. [http://dx

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Performance of deformed tungsten under ELM-like plasma exposures in QSPA Kh-50

Cited by 57 publications

References 10 publications

Simulation of residual thermostress in tungsten after repetitive ELM-like heat loads

Simulation of residual thermostress in tungsten after repetitive ELM-like heat loads

Modelling Thermal Shock Based Cracking Behaviour of Armour Material for Fusion Reactor

A Thomson-type mass and energy spectrometer for characterizing ion energy distributions in a coaxial plasma gun operating in a gas-puff mode

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