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The isotope dependence of the low- to high confinement-mode (L- to H-mode) transition power threshold P LH presents significant challenges for the initial (non-nuclear) hydrogen operations phase of the international thermonuclear experimental reactor (ITER). H…
pubmed
Schmitz L
2023 Feb 20
置信度 0.82
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The dithering H-mode phase, characterized by oscillations, is generally observed at input power values close to the L-H transition power threshold and low plasma collisionalities (low electron density and/or high plasma temperature). Measurements to characteri…
pubmed
Andrew Y, Bland J, Buxton P, Dnestrovskij A 等
2023 Feb 20
置信度 0.82
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A fiber optic bolometer (FOB) was demonstrated observing a fusion plasma for the first time at the DIII-D tokamak. A FOB uses a fiber optics-based interferometric technique that is designed to have a high sensitivity to temperature changes [75 mK/(W/m 2 ) resp…
pubmed
Lee S, Shafer M, Reinke M, Uddin N 等
2022 Dec 1
置信度 0.82
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A new broad-energy, high-resolution gamma ray spectrometer (GRS) with Compton suppression function has been developed recently in the HL-2A tokamak to obtain the gamma ray information in the energy range of 0.1-10 MeV. This is the first time to develop an…
pubmed
Zhang YP, Zhang J, Cheng SK, Zhu JJ 等
2022 Dec 1
置信度 0.82
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High resolution spectroscopy on the Tokamak à Configuration Variable (TCV) divertor plasma provided Doppler broadening measurements to infer the ion and neutral temperature of injected helium gas. This paper presents the Divertor Spectroscopy System's (DS…
pubmed
Martinelli L, Mikitchuck D, Duval BP, Andrebe Y 等
2022 Dec 1
置信度 0.82
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We present the design and operation of a suite of Gas Puff Imaging (GPI) diagnostic systems installed on the Tokamak à Configuration Variable (TCV) for the study of turbulence in the plasma edge and Scrape-Off-Layer (SOL). These systems provide the unique…
pubmed
Offeddu N, Wüthrich C, Han W, Theiler C 等
2022 Dec 1
置信度 0.82
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Two pairs of space-resolved extreme ultraviolet (EUV) spectrometers working at 5-138 Å with different vertical observation ranges of -7 ≤ Z ≤ 19 and -18 ≤ Z ≤ 8 cm have been newly developed to observe the radial profile of…
pubmed
Cheng Y, Zhang L, Morita S, Hu A 等
2022 Dec 1
置信度 0.82
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We present two-dimensional turbulent electric field calculations via physics-informed deep learning consistent with (i) drift-reduced Braginskii theory under the framework of an axisymmetric fusion plasma with purely toroidal field and (ii) experimen…
pubmed
Mathews A, Hughes JW, Terry JL, Baek SG
2022 Dec 2
置信度 0.82
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Filaments or blobs are well known to strongly contribute to particle and energy losses both in L- and H-mode, making them an important plasma characteristic to investigate. They are plasma structures narrowly localized across a magnetic field and stretched alo…
pubmed
Yashin A, Teplova N, Zadvitskiy G, Ponomarenko A
2022
置信度 0.82
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Silicon plates were installed above the inner and outer divertor of the JET with the ITER-like wall (ILW) after the second and third ILW campaigns to monitor dust generation and deposition with the aim to determine the morphology and content of individual part…
pubmed
Fazinić S, Provatas G, Božičević Mihalić I, Tadić T 等
2022 Nov 24
置信度 0.82
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Experiments on the DIII-D tokamak have identified a novel regime in which applied resonant magnetic perturbations (RMPs) increase the particle confinement and overall performance. This Letter details a robust range of counter-current rotation over which RMPs c…
pubmed
Logan NC, Hu Q, Paz-Soldan C, Nazikian R 等
2022 Nov 11
置信度 0.82
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A heavy ion beam probe (HIBP) has been designed for the QUEST spherical tokamak to measure plasma turbulence and the profiles of electric potential profiles. Using a cesium ion beam with an energy of several 10 keV, the observable region covers most of th…
pubmed
Ido T, Hasegawa M, Ikezoe R, Onchi T 等
2022 Nov 1
置信度 0.82
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The Gamma Ray Imager (GRI) is a pinhole camera providing 2D imaging of MeV hard x-ray (HXR) bremsstrahlung emission from runaway electrons (REs) over the poloidal cross section of the DIII-D tokamak. We report a series of upgrades to the GRI expanding the acce…
pubmed
Lvovskiy A, Paz-Soldan C, Eidietis N, Dal Molin A 等
2022 Nov 1
置信度 0.82
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A new high radial resolution 2D multichannel Charge eXchange Imaging (CXI) diagnostic is under development for deployment at DIII-D. The diagnostic system will measure low-to-intermediate radial wavenumber carbon density fluctuations by observing the n = 8 - 7…
pubmed
Major MR, McKee GR, Geiger B, Hartog DJD 等
2022 Nov 1
置信度 0.82
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Nascent observations about the influence of kinetic instabilities on electron cyclotron emission (ECE) from runaway electrons (REs) have been detected and explored at the Aditya-Upgrade (Aditya-U) tokamak. The developed broadband ECE radiometer system offers w…
pubmed
Siju V, Pandya SP, Pathak SK, Nagora U 等
2022 Nov 1
置信度 0.82
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COMPASS Upgrade is a medium size and high field tokamak that is capable of addressing key challenges for reactor grade tokamaks, including power exhaust and advanced confinement scenarios. Electron cyclotron emission will be available among the first diagnosti…
pubmed
Houshmandyar S, Watts TA, Rowan WL, Zajac J 等
2022 Nov 1
置信度 0.82
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A Fast Visible Imaging Diagnostic (FVID) system, measuring the visible light emission spectrum (400-1000 nm) from tokamak plasma, has been installed on the Aditya-U tokamak to monitor the two-dimensional dynamics of the poloidal cross section of the plasm…
pubmed
Kumawat D, Tahiliani K, I S, Pathak SK 等
2022 Nov 1
置信度 0.82
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Dedicated nuclear diagnostics have been designed, developed, and built within EUROFUSION enhancement programs in the last ten years for installation at the Joint European Torus and capable of operation in high power Deuterium-Tritium (DT) plasmas. The recent D…
pubmed
Tardocchi M, Rebai M, Rigamonti D, Tinguely RA 等
2022 Nov 1
置信度 0.82
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Trapped electron mode (TEM) is the main source of turbulence predicted for the unique operation regime of a flat temperature profile under low-recycling conditions in the LTX-β tokamak, while ion temperature gradient driven turbulence may also occur with…
pubmed
Banerjee S, Boyle DP, Maan A, Majeski R 等
2022 Nov 1
置信度 0.82
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A new Doppler backscattering (DBS) system has been installed and tested on the MAST-U spherical tokamak. It utilizes eight simultaneous fixed frequency probe beams (32.5, 35, 37.5, 40, 42.5, 45, 47.5, and 50 GHz). These frequencies provide a range of radi…
pubmed
Rhodes TL, Michael CA, Shi P, Scannell R 等
2022 Nov 1
置信度 0.82
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Tungsten is regarded as the baseline first wall material in tokamaks. This work provides a polarized method for measuring the emissivity and temperature of the tungsten using an infrared camera and a polarizer under simulating tokamak conditions. In the experi…
pubmed
Shu S, Wu T, Yang Z, Yang J 等
2022 Nov 1
置信度 0.82
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System-on-chip millimeter wave integrated circuit technology is used on the two-dimensional millimeter-wave imaging reflectometer (MIR) upgrade for density fluctuation imaging on the DIII-D tokamak fusion plasma. Customized CMOS chips have been successfully de…
pubmed
Zhu Y, Chen Y, Yu JH, Domier C 等
2022 Nov 1
置信度 0.82
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Measurements of radiated power are critical for characterizing and optimizing tokamak performance. The RADCAM system, comprising arrays of foil bolometers, Absolute eXtreme UltraViolet (AXUV), and filtered soft x-ray diodes, has been constructed to provide imp…
pubmed
Sheikh UA, Simons L, Duval BP, Février O 等
2022 Nov 1
置信度 0.82
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A novel Motional Stark Effect spectroscopy system has been designed for application at the DIII-D tokamak. The system is optimized for studies of the poloidal and toroidal magnetic field in the plasma pedestal region with frame rates of up to 10 kHz. Ligh…
pubmed
Albosta R, Geiger B, McKee G, Den Hartog D 等
2022 Nov 1
置信度 0.82
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A compact solid state neutral particle analyzer (SSNPA) diagnostic, previously installed at NSTX-U, has been moved to MAST-U and successfully operated in the first physics campaign (MU01). The SSNPA operates by detecting the flux of fast neutral particles prod…
pubmed
Prechel G, Fil N, Liu D, Heidbrink WW 等
2022 Nov 1
置信度 0.82
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A new neutral particle analyzer (NPA) diagnostic based on single crystal chemical vapor deposition (sCVD) diamond detector that provides measurements of fast ions has been designed and installed on HL-2A tokamak. Diamond detectors have been applied in some mag…
pubmed
Qu YF, Zang LG, Chen W, Hou YM 等
2022 Nov 1
置信度 0.82
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Spectroscopy in vacuum ultraviolet (VUV) and visible ranges plays an important role in the investigation and diagnosis of tokamak plasmas. However, under harsh environmental conditions of fusion grade devices, such as ITER, VUV-visible systems encounter many i…
pubmed
Ramaiya N, Manchanda R, Chowdhuri MB, Yadava N 等
2022 Nov 1
置信度 0.82
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This paper presents the results of experimental studies of the interaction of helium plasma with a near-surface tungsten carbide layer. The experiments were implemented at the plasma-beam installation. The helium plasma loading conditions were close to those e…
pubmed
Skakov M, Miniyazov A, Batyrbekov E, Baklanov V 等
2022 Nov 5
置信度 0.82
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We use the beam model of Doppler backscattering (DBS), which was previously derived from beam tracing and the reciprocity theorem, to shed light on mismatch attenuation. This attenuation of the backscattered signal occurs when the wavevector of the probe beam'…
pubmed
Hall-Chen VH, Damba J, Parra FI, Pratt QT 等
2022 Oct 1
置信度 0.82
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Two newly developed, eight-channel, integrated Beam Emission Spectroscopy (BES) detectors have been installed at Huan-Liuqi-2A tokamak, which extends the existing 16 single-channel modular BES system with additional 16 spatial channels. The BES collects the Do…
pubmed
Qin X, McKee G, Yan Z, Geiger B 等
2022 Oct 1
置信度 0.82
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Highly overdense magnetically confined fusion plasmas, such as the Mega Amp Spherical Tokamak (MAST) Upgrade, cannot easily be heated using conventional electron cyclotron resonance heating because high density cutoffs block microwave access to the plasma core…
pubmed
Senstius MG, Freethy SJ, Allen J, Nielsen SK
2022 Oct 1
置信度 0.82
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Electromagnetic pickup noise in the tokamak environment imposes an imminent challenge for measuring weak diagnostic photocurrents in the nA range. The diagnostic signal can be contaminated by an unknown mixture of crosstalk signals from coils powered by curren…
pubmed
Odstrcil T, Laggner FM, Rosenthal AM, Bortolon A 等
2022 Oct 1
置信度 0.82
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WEST (tungsten environment in steady-state tokamak) is starting operation for the first time with a water-cooled full tungsten divertor, enabling long pulse operation. Heating is provided by radiofrequency systems, including lower hybrid current drive (LHCD). …
pubmed
Barbui T, Chellaï O, Delgado-Aparicio LF, Peysson Y 等
2022 Oct 1
置信度 0.82
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Vertical position stability plays a crucial role in maintaining safe and reliable plasma operation for long-pulse fusion devices. In general, the vertical position is measured by using inductive magnetic coils installed inside the vacuum vessel; however, the i…
pubmed
Lian H, Liu HQ, Brower DL, Ding WX 等
2022 Oct 1
置信度 0.82
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A repetitive plasma source for simulation of mitigated edge localized mode transient heat load is developed. The repetitive plasma source consists of a repetitive pulsed power supply and a pulsed plasma accelerator. The pulsed plasma accelerator is composed of…
pubmed
Liu S, Xu T, Shi Y, Zhan W 等
2022 Oct 1
置信度 0.82
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The high density fluctuation poloidal wavenumber, k θ (k θ > 8 cm -1 , k θ ρ s > 5, ρ s is the ion gyro radius using the ion sound velocity), measurement capability of a new Doppler backscattering (DBS) system at the DI…
pubmed
Damba J, Pratt Q, Hall-Chen VH, Hong R 等
2022 Oct 1
置信度 0.82
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Hard x-ray (HXR) spectroscopy is applied for diagnostics of runaway electrons in nuclear fusion reactors. The scintillation counter is one of the most commonly used types of detectors for HXR spectroscopy. It consists of a detector that emits light when excite…
pubmed
Nowak Vel Nowakowski P, Makowski D, Jabłoński B, Szajerski P 等
2022 Oct 1
置信度 0.82
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A tokamak, a torus-shaped nuclear fusion device, needs an electric current in the plasma to produce magnetic field in the poloidal direction for confining fusion plasmas. Plasma current is conventionally generated by electromagnetic induction. However, for a s…
pubmed
Na YS, Seo J, Lee Y, Choi G 等
2022 Oct 29
置信度 0.82
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The analysis of turbulence in plasmas is fundamental in fusion research. Despite extensive progress in theoretical modeling in the past 15 years, we still lack a complete and consistent understanding of turbulence in magnetic confinement devices, such as tokam…
pubmed
Han W, Pietersen RA, Villamor-Lora R, Beveridge M 等
2022 Oct 28
置信度 0.82
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Tokamak operational regimes with small edge localized modes (ELMs) could be a solution to the problem of large transient heat loads in fusion reactors. A ballooning mode near the last closed flux surface governed by the pressure gradient and the magnetic shear…
pubmed
Harrer GF, Faitsch M, Radovanovic L, Wolfrum E 等
2022 Oct 14
置信度 0.82
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The nonlinear excitation of zonal flows (ZFs) generated by the ion-temperature-gradient turbulence in a tokamak plasma is investigated by using the global gyrokinetic code nlt. It is found that ZFs are initially driven by the nonlinear self-interaction of the …
pubmed
Wang Z, Dai Z, Wang S
2022 Sep
置信度 0.82
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We report on laser shock peening (LSP) of tungsten, a material used as a divertor in Tokamak machine for magnetic confinement fusion reactions such as the ITER facility (France) and JET facility (UK). Peak compressive stresses of -370 MPa and depths of up to 1…
pubmed
Banerjee S, Spear J, Dalton PJ
2022 Aug 29
置信度 0.82
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One of the remaining challenges in magnetic thermonuclear fusion is survival of the heat shield protecting the tokamak reactor vessel against excessive plasma heat fluxes. Unmitigated high confinement edge localized mode (ELM) is a regular heat pulse damaging …
pubmed
Horacek J, Lukes S, Adamek J, Havlicek J 等
2022
置信度 0.82
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The most performant deuterium-tritium (DT) plasma discharges realized by the Joint European Torus (JET) tokamak in the recent DT campaign have produced neutron yields on the order of 10 18 n/s. At such high neutron yields, gamma-ray spectroscopy measurements w…
pubmed
Marcer G, Khilkevitch E, Shevelev A, Croci G 等
2022 Sep 1
置信度 0.82
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Neutral Beam Injection (NBI) is one of the four efficient ways of assistant heating on the Experimental Advanced Superconducting Tokamak (EAST) device. Measures have been taken to ensure more reliable monitoring of NBI components' thermal data. Infrared thermo…
pubmed
Shi C, Liu Z, Liang L, Liu W 等
2022 Sep 1
置信度 0.82
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A new concept for velocity space thermal ion loss detection is presented. This diagnostic provides pitch angle resolved measurements that are unfeasible with current diagnostics. It uses the same detection principle as the Fast-Ion Loss Detector with a scintil…
pubmed
Poley-Sanjuán J, Galdón-Quiroga J, Viezzer E, Rueda-Rueda J 等
2022 Sep 1
置信度 0.82
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The Joint European Torus (JET) is the only tokamak in the world able to operate in Deuterium-Tritium (DT) plasmas. A successful DT experimental campaign, the DTE2, has recently been carried out, providing unique opportunities for studying both physics and tech…
pubmed
Rigamonti D, Dal Molin A, Gorini G, Marcer G 等
2022 Sep 1
置信度 0.82
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A time domain algorithm has been developed to remove the vacuum pickup generated by both coil current (DC) and induced vessel current (AC) in real time from three dimensional (3D) magnetic diagnostic signals in the National Spherical Torus Experiment-Upgrade (…
pubmed
Munaretto S, Myers CE, Gerhardt SP, Logan NC 等
2022 Sep 1
置信度 0.82
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Runaway electrons (REs) are passively studied by hard x-ray (HX) emissions generated by REs. A LaBr 3 (Ce) detector-based HX spectroscopic diagnostic (operational within ∼75 keV to 3.5 MeV) has been set up on the ADITYA-U. The diagnostic acqui…
pubmed
Purohit S, Gupta MK, Chowdhuri MB, Mansuri I 等
2022 Sep 1
置信度 0.82
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We present methods for analyzing Beam Emission Spectroscopy (BES) data to obtain the plasma density evolution associated with rapid sawtooth crash events at the DIII-D tokamak. BES allows coverage over a 2D spatial plane, inherently local measurements, with fa…
pubmed
Bose S, Fox W, Liu D, Yan Z 等
2022 Sep 1
置信度 0.82
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Electromagnetic waves emitted during a tokamak discharge can be partially ascribed to coupling with plasma waves. In particular, in the presence of runaway electrons, the electromagnetic waves deliver information, otherwise inaccessible, about kinetic instabil…
pubmed
Bin W, Buratti P, Cardinali A, Castaldo C 等
2022 Sep 1
置信度 0.82
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Neutron flux measurements are important in fusion devices for both safety requirements and physics studies. A new system has been built for the Mega-Amp Spherical Tokamak Upgrade (MAST Upgrade) that provides neutron count, DC, and Campbell mode measurements fo…
pubmed
Vincent C, Allan S, Naylor G, Stephen R 等
2022 Sep 1
置信度 0.82
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Organic solar cells are famous for their cheap solution processing. Their industrialization needs fast designing of efficient materials. For this purpose, testing of large number of materials is necessary. Machine learning is a better option due to cheaper pre…
pubmed
Alwadai N, Khan SU, Elqahtani ZM, Ud-Din Khan S
2022 Sep 11
置信度 0.82
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An accessibility enhanced efficient fundamental X-mode electron cyclotron heating (ECH) current start-up regime was identified for a reactorlike toroidal magnetic field range which has more than 100 times higher current drive efficiency compared to more conven…
pubmed
Ono M, Bertelli N, Shevchenko V, Idei H 等
2022 Aug
置信度 0.82
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Revamped German stellarator should run longer, hotter and compete with tokamaks.
pubmed
Clery D
2022 Sep 9
置信度 0.82
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Nuclear fusion is one of the most attractive alternatives to carbon-dependent energy sources 1 . Harnessing energy from nuclear fusion in a large reactor scale, however, still presents many scientific challenges despite the many years of research and steady ad…
pubmed
Han H, Park SJ, Sung C, Kang J 等
2022 Sep
置信度 0.82
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A double crystal assembly (DCA) for multiple atomic spectra measurements, including helium-like Ar and hydrogen-like Ar, and other impurity lines are applied for the x-ray imaging crystal spectrometer in Korea Superconducting Tokamak Advanced Research. The DCA…
pubmed
Lee SG, KSTAR Team
2022 Aug 1
置信度 0.82
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A synthetic electron cyclotron emission (ECE) diagnostic is used to interpret ECE signals from preset plasma equilibrium profiles, including magnetic field, electron density, and electron temperature. According to the simulation results, the electron temperatu…
pubmed
Yu X, Shi ZB, Jiang M, Yu GY 等
2022 Aug 1
置信度 0.82
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A new visible imaging system characterizing a flexible optical design and delivering high resolution frames is established on the HL-2A tokamak. It features a modular configuration, consisting of a front-end imaging lens, a set of bilateral telecentric relay l…
pubmed
Liu L, Yu DL, Shi ZB, Zhai WY 等
2022 Aug 1
置信度 0.82
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The motional Stark effect (MSE) diagnostic system at KSTAR (Korea Superconducting Tokamak Advanced Research) often suffers from the drawback of possible systematic uncertainties in measurements due to overlap of the MSE spectra generated from three different i…
pubmed
Ko J
2022 Aug 1
置信度 0.82
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Toroidal current profile measurements in the tokamak plasma edge are critical for fusion plasma physics research and model validation. A three-wave Faraday-effect polarimeter-interferometer with a sub-centimeter spatial resolution is proposed on the DIII-D tok…
pubmed
Chen J, Brower DL, Benedett T
2022 Aug 1
置信度 0.82
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Eddy currents induced in electrically conductive objects can be used to locate metallic objects as well as to assess the properties of materials non-destructively without physical contact. This technique is useful for material identification, such as measuring…
pubmed
Elson L, Meraki A, Rushton LM, Pyragius T 等
2022 Aug 9
置信度 0.82
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The transition from strong (fluidlike) to nearly marginal (Floquet-type) regimes of ion-temperature-gradient (ITG) driven turbulence is studied in the stellarator Wendelstein 7-X by means of numerical simulations. Close to marginality, extended (along magnetic…
pubmed
Zocco A, Podavini L, Garcìa-Regaña JM, Barnes M 等
2022 Jul
置信度 0.82
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Kinetic instabilities driven by runaway electrons (REs) have recently received attention in the fusion community as a means to control and diagnose REs in a tokamak. Experiments aimed at studying such kinetic instabilities have been performed at the Frascati T…
pubmed
Bin W, Castaldo C, Napoli F, Buratti P 等
2022 Jul 22
置信度 0.82
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A novel dual-reflection configuration is introduced for the International Tokamak Experimental Reactor (ITER) core x-ray spectrometer to fit the allocated space where it will be placed accompanied by moving the detectors backward to reduce the incident radiati…
pubmed
Cheng Z, Bader A, De Bock M, Barnsley R 等
2022 Jul 1
置信度 0.82
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A hard x-ray spectrometer based on a φ25 × 25 mm 2 LaBr 3 scintillator has been developed to measure the runaway electron bremsstrahlung. Simulation results by GEANT4 show that x rays with an energy of 15 MeV can be effectively detected. I…
pubmed
Yuan G, Wen Z, Wei L, Zhang J 等
2022 Jul 1
置信度 0.82
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In a Heavy Ion Beam Diagnostic (HIBD), the plasma potential is obtained by measuring the energy of the secondary ions resulting from beam-plasma collisions by an electrostatic energy analyzer with split-plate detector (SPD), which relates the secondary ion bea…
pubmed
Nedzelskiy I, Malaquias A, Henriques R, Sharma R
2022 Jul 8
置信度 0.82
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Fusion energy is a promising source of clean energy, which could solve energy shortages and environmental pollution. Research into controlled fusion energy has been ongoing for over half a century. China has created a clear roadmap for magnetic confinement fus…
pubmed
Zheng J, Qin J, Lu K, Xu M 等
2022 Jul 12
置信度 0.82
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Long-pulse operation of a self-sustained fusion reactor using toroidal magnetic containment requires control over the content of alpha particles produced by D-T fusion reactions. On the one hand, MeV-class alpha particles must stay confined to heat the plasma.…
pubmed
Bierwage A, Shinohara K, Kazakov YO, Kiptily VG 等
2022 Jul 8
置信度 0.82
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In absence of external torque, plasma rotation in tokamaks results from a balance between collisional magnetic braking and turbulent drive. The outcome of this competition and cooperation is essential to determine the plasma flow. A reduced model, supported by…
pubmed
Varennes R, Garbet X, Vermare L, Sarazin Y 等
2022 Jun 24
置信度 0.82
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A quasisymmetry is a special symmetry that enhances the ability of a magnetic field to trap charged particles. Quasisymmetric magnetic fields may allow the realization of next generation fusion reactors (stellarators) with superior performance when compared wi…
pubmed
Sato N
2022 Jul 5
置信度 0.82
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Interferometry is one of the key diagnostics for fusion research. This diagnostic measures electron plasma density. Interferometers that work on an intermediate frequency are widespread nowadays. The phase shift between interferometer signals has to be measure…
pubmed
Drozd A, Sergeev D
2022 Jun 1
置信度 0.82
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The role of turbulence in setting boundary plasma conditions is presently a key uncertainty in projecting to fusion energy reactors. To robustly diagnose edge turbulence, we develop and demonstrate a technique to translate brightness measurements of HeI line r…
pubmed
Mathews A, Terry JL, Baek SG, Hughes JW 等
2022 Jun 1
置信度 0.82
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It is well documented that the central electron temperature in the national spherical torus experiment (NSTX) remains largely unchanged as the external heating power, and hence the normalized volume averaged plasma pressure β increases [Stutman, Phys. Re…
pubmed
Jardin SC, Ferraro NM, Guttenfelder W, Kaye SM 等
2022 Jun 17
置信度 0.82
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We present a gyrokinetic analysis of the vortex flow evolution in a magnetic island in collisionless tokamak plasmas. In a short term ω[over ¯]_{D}t<1, where ω[over ¯]_{D} is the secular magnetic drift of the orbit center, initial mono…
pubmed
Choi GJ, Hahm TS
2022 Jun 3
置信度 0.82
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Long-lived mode (LLM) in rotating plasmas is studied by using a alternative dispersion relation. This work offers a theoretical interpretation of LLM observed in experiments [Heidbrink, Phys. Rev. Lett. 57, 835 (1986)10.1103/PhysRevLett.57.835; Chapman, Nucl. …
pubmed
Xie W
2022 May
置信度 0.82
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The unique arrangement of the heavy-ion beam diagnostic in ISTTOK enables one to measure the evolution of temperature, density and pressure-like profiles in normal and AC discharges. The fast chopping beam technique provided the possibility to reduce the noise…
pubmed
Malaquias A, Nedzelskiy IS, Henriques R, Sharma R
2022 May 26
置信度 0.82
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Octalithium ceramics with their high stoichiometric concentration of lithium offer exceptionally high tritium breeding ratios in comparison with other candidate breeder materials for tokamak fusion reactors, this is especially true with incorporation of a neut…
pubmed
Davies AW, Murphy ST
2022 Jul 1
置信度 0.82
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A first-principles scaling law, based on turbulent transport considerations, and a multimachine database of density limit discharges from the ASDEX Upgrade, JET, and TCV tokamaks, show that the increase of the boundary turbulent transport with the plasma colli…
pubmed
Giacomin M, Pau A, Ricci P, Sauter O 等
2022 May 6
置信度 0.82
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We open an avenue for discussing how we can pave the way for compliance with existing regulations is a far-reaching factor for settling nuclear fusion technology. Based on a model of the Korean Fusion Demonstration Reactor (K-DEMO) with a target fusion power o…
pubmed
Kim BS, Hong SH, Kim K
2022 May 18
置信度 0.82
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Ion cyclotron resonance heating (ICRH), one of the main auxiliary methods, for high-power and long-pulse plasma heating had been developed in Experimental Advanced Superconducting Tokamak (EAST). An impedance matching system, one important part of ICRH, had be…
pubmed
Liu LN, Wang L, Yuan S, Mao YZ 等
2022 Apr 1
置信度 0.82
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Analyzing the radiation spectra of impurity ions is a widely applied diagnostic scheme for plasma ion temperature and rotation measurements on tokamaks. High precision wavelength calibration is a prerequisite for the accurate measurement of plasma parameters, …
pubmed
Fu S, Yin X, Fu J, Li Y 等
2022 Apr 1
置信度 0.82
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In a tokamak, disruption is defined as losing control over a confined plasma resulting in sudden extinction of the plasma current. Machine learning offers potent solutions to classify plasma discharges into disruptive and non-disruptive classes. Evolving exper…
pubmed
Chandrasekaran J, Jayaraman S, Jayakumar Chandrasekaran, Sangeetha Jayaraman
2022 Mar 1
置信度 0.82
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Laser-aided interferometers are employed as the common diagnostics for electron density measurements. On the EAST (Experimental Advanced Superconducting Tokamak), we have four main electron density diagnostics-the far-infrared hydrogen cyanide interferometer, …
pubmed
Yao Y, Li W, Zhang Y, Song Y 等
2022 Mar 1
置信度 0.82
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A practical procedure of determining the best choice of particle tracking velocimetry (PTV) methods for the analysis of two-dimensional (2D) dusty plasmas is provided. Using the measured particle positions with errors, the algorithm of PTV introduces further s…
pubmed
Zeng Y, Ma Z, Feng Y
2022 Mar 1
置信度 0.82
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Magnetic measurements during dc helicity injection tokamak startup indicate Alfvénic turbulence in the injected current streams mediates magnetic relaxation and results in macroscopic plasma current drive. Localization of such activity to the injected cur…
pubmed
Richner NJ, Bodner GM, Bongard MW, Fonck RJ 等
2022 Mar 11
置信度 0.82
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The first principle gyrokinetic simulations of trapped electron turbulence in tokamak fusion plasmas demonstrate the energy transfers from the most linearly unstable modes at high [Formula: see text] to intermediate [Formula: see text] via parametric decay pro…
pubmed
Qi L
2022 Mar 23
置信度 0.82
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Building a successful device for the magnetic fusion energy production is a great challenge. ITER is an international project of the tokamak based magnetic fusion design being developed for the demonstration of the feasibility of thermonuclear technologies for…
pubmed
Sizyuk V, Hassanein A
2022 Mar 18
置信度 0.82
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High-β_{θe} (a ratio of the electron thermal pressure to the poloidal magnetic pressure) steady-state long-pulse plasmas with steep central electron temperature gradient are achieved in the Experimental Advanced Superconducting Tokamak. An intrinsi…
pubmed
Li E, Zou XL, Xu LQ, Chu YQ 等
2022 Feb 25
置信度 0.82
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ITER must meet safety concerns before welding giant tokamak sections.
pubmed
Clery D
2022 Mar 4
置信度 0.82
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The trapping of a lower hybrid wave in the tokamak edge transport barrier is predicted, reducing by 3 orders of magnitude the excitation threshold for the absolute parametric decay instability that leads to side scattering of the ordinary microwave pump in ele…
pubmed
Gusakov EZ, Popov AY
2022 Feb 11
置信度 0.82
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In the recent past, plasma waste technology has emerged to be an environmental friendly and beneficial technology. In this review, current status of thermal plasma, non-thermal plasma and its application for nano-scale high-tech plasmonic materials based on th…
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Khan SU, Khan R, Hussain S
2022
置信度 0.82
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World's largest tokamak paves the way for ITER with a capstone run of pulses using power-producing tritium.
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Clery D
2022 Feb 11
置信度 0.82
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A novel approach for density measurements at the edge of a hot plasma device is presented-Microwave Interferometer in the Limiter Shadow (MILS). The diagnostic technique is based on measuring the change in phase and power of a microwave beam passing tangential…
pubmed
Usoltceva M, Heuraux S, Khabibullin I, Faugel H
2022 Jan 1
置信度 0.82
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The role of self-generated zonal flows in the collisionless trapped-electron-mode (CTEM) turbulence is a long-standing open issue in tokamak plasmas. Here, we show, for the first time, that the zonal flow excitation in the CTEM turbulence is formally isomorphi…
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Chen H, Chen L
2022 Jan 14
置信度 0.82
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Over the past several years, high- β N experiments have been carried out on HL-2A. The high- β N is realized using double transport barriers (DTBs) with hybrid scenarios. A stationary high- β N ( > 2 ) scenario was obtained by pure neutral…
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Chen W, Yu L, Xu M, Ji X 等
2022 Sep
置信度 0.82
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In many fields of science, comprehensive and realistic computational models are available nowadays. Often, the respective numerical calculations call for the use of powerful supercomputers, and therefore only a limited number of cases can be investigated expli…
pubmed
Farcaş IG, Merlo G, Jenko F
2022
置信度 0.82
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Fast ion phase-space flow, driven by Alfvén eigenmodes (AEs), is measured by an imaging neutral particle analyzer in the DIII-D tokamak. The flow firstly appears near the minimum safety factor at the injection energy of neutral beams, and then moves radia…
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Du XD, Van Zeeland MA, Heidbrink WW, Gonzalez-Martin J 等
2021 Dec 3
置信度 0.82
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Sources of negative ions such as H - are essential elements of proton accelerators and tokamaks. They have limited lifetime. The replacement of an ion source is a costly process causing delays in the operation of the entire machine. The hot tungsten filament i…
pubmed
Yampolsky N, Rybarcyk L, Henestroza E, Draganic I
2021 Nov 1
置信度 0.82
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We introduce a new correlation analysis technique for thermal helium beam (THB) diagnostics. Instead of directly evaluating line ratios from fluctuating time series, we apply arithmetic operations to all available He I lines and construct time series with desi…
pubmed
Nishizawa T, Griener M, Dux R, Grenfell G 等
2021 Oct 1
置信度 0.82