Using mixed gases for massive gas injection disruption mitigation on Alcator C-Mod

Bakhtiari, M.; Olynyk, G.M.; Granetz, R.; Whyte, D.G.; Reinke, M.L.; Zhurovich, K.; Izzo, V.A.

doi:10.1088/0029-5515/51/6/063007

Cited by 33 publications

(25 citation statements)

References 22 publications

(55 reference statements)

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“…With this mix, I H /I P dropped a factor of three compared to an unmitigated disruption and the rate of current quench also exceeded the cases with pure gases. 381 Figure 66 shows a comparison between a mitigated and unmitigated disruption, where the reduction in vertical motion and the magnitude of halo currents is clear.…”

Section: A Disruption Mitigationmentioning

confidence: 99%

20 years of research on the Alcator C-Mod tokamak

et al. 2014

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The object of this review is to summarize the achievements of research on the Alcator C-Mod tokamak [Hutchinson et al., Phys. Plasmas 1, 1511 and Marmar, Fusion Sci. Technol. 51, 261 (2007)] and to place that research in the context of the quest for practical fusion energy. C-Mod is a compact, high-field tokamak, whose unique design and operating parameters have produced a wealth of new and important results since it began operation in 1993, contributing data that extends tests of critical physical models into new parameter ranges and into new regimes. Using only highpower radio frequency (RF) waves for heating and current drive with innovative launching structures, C-Mod operates routinely at reactor level power densities and achieves plasma pressures higher than any other toroidal confinement device. C-Mod spearheaded the development of the vertical-target divertor and has always operated with high-Z metal plasma facing componentsapproaches subsequently adopted for ITER. C-Mod has made ground-breaking discoveries in divertor physics and plasma-material interactions at reactor-like power and particle fluxes and elucidated a) Paper AR1 1, Bull. Am. Phys. Soc. 58, 21 (2013). b) Invited speaker.

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Section: A Disruption Mitigationmentioning

confidence: 99%

20 years of research on the Alcator C-Mod tokamak

et al. 2014

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“…Experiments investigating the rapid production of the required high density for runaway mitigation are being pursued. [88][89][90] The required density would be reduced if runaway electrons suffered additional losses. Evidence for such losses have been seen on DIII-D, but the nature of these losses needs further exploration.…”

Section: Preventionmentioning

confidence: 99%

Theory of tokamak disruptions

Boozer

2012

Physics of Plasmas

122

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“…MGI aims at spreading heat loads by radiating most of the plasma stored energy, preventing the generation of REs by increasing the electron density and controlling the CQ duration (in order to limit mechanical loads) by controlling the impurity content and thus the temperature and resistivity of the CQ plasma. A large body of experimental work on MGI exists, including experiments on JET, [6][7][8][9] ASDEX Upgrade, 10 Tore Supra, 11 DIII-D, 12 TEXTOR, 13 Alcator C-MOD, 14 and other devices. Results have shown the capability of MGI to fulfill part of the objectives of the ITER DMS, but not yet all of them.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional non-linear magnetohydrodynamic modeling of massive gas injection triggered disruptions in JET

et al. 2015

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Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers) Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication Citation for published version (APA):Fil, A., Nardon, E., Hoelzl, M., Huijsmans, G. T. A., Orain, F., Becoulet, M., ... . Threedimensional non-linear magnetohydrodynamic modeling of massive gas injection triggered disruptions in JET. Physics of Plasmas, 22, 062509-1/18. DOI: 10.1063/1.4922846 General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Three-dimensional non-linear magnetohydrodynamic modeling of massive gas injection triggered disruptions in JET JOREK 3D non-linear MHD simulations of a D 2 Massive Gas Injection (MGI) triggered disruption in JET are presented and compared in detail to experimental data. The MGI creates an overdensity that rapidly expands in the direction parallel to the magnetic field. It also causes the growth of magnetic islands (m=n ¼ 2=1 and 3/2 mainly) and seeds the 1/1 internal kink mode. O-points of all island chains (including 1/1) are located in front of the MGI, consistently with experimental observations. A burst of MHD activity and a peak in plasma current take place at the same time as in the experiment. However, the magnitude of these two effects is much smaller than in the experiment. The simulated radiation is also much below the experimental level. As a consequence, the thermal quench is not fully reproduced. Directions for progress are identified. Radiation from impurities is a good candidate. V C 2015 AIP Publishing LLC.[http://dx

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Using mixed gases for massive gas injection disruption mitigation on Alcator C-Mod

Cited by 33 publications

References 22 publications

20 years of research on the Alcator C-Mod tokamak

20 years of research on the Alcator C-Mod tokamak

Theory of tokamak disruptions

Three-dimensional non-linear magnetohydrodynamic modeling of massive gas injection triggered disruptions in JET

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