Results 61 to 70 of about 1,348 (158)

Expanding the role of impurity spectroscopy for investigating the physics of high-Z dissipative divertors

Nuclear Materials and Energy, 2017
New techniques that attempt to more fully exploit spectroscopic diagnostics in the divertor and pedestal region during highly dissipative scenarios are demonstrated using experimental results from recent low-Z seeding experiments on Alcator C-Mod, JET ...
M.L. Reinke, A. Meigs, E. Delabie, R. Mumgaard, F. Reimold, S. Potzel, M. Bernert, D. Brunner, J. Canik, M. Cavedon, I. Coffey, E. Edlund, J. Harrison, B. LaBombard, K. Lawson, B. Lomanowski, J. Lore, M. Stamp, J. Terry, E. Viezzer   +19 more
doaj   +1 more source

Mechanism of central temperature peaking in impurity seeded plasmas [PDF]

Plasma Physics and Controlled Fusion, 2003
Formation of a centrally peaked profile of the ion temperature by impurity seeding has been observed in all the largest tokamaks: JET, JT-60U, TFTR. A possible explanation of this phenomenon is proposed, which takes into account the suppression of ion temperature gradient instability induced anomalous transport through increasing ion effective charge ...
openaire   +2 more sources

Interpretive modeling of tungsten divertor leakage during experiments with neon gas seeding

Nuclear Fusion
Many existing and future tokamaks with tungsten divertors operate, or will operate, with low- Z impurity seeding, but the direct effect of these seeded impurities on tungsten Scrape-off-Layer (SOL) transport has not been explored in detail.
Matthew S. Parsons, Gregory Sinclair, Tyler Abrams, Patrick Byrne, Colin Chrystal, Florian Effenberg, Jeffrey L. Herfindal, Tomas Odstrcil, Robert S. Wilcox   +8 more
doaj   +1 more source

Characterizing core and edge turbulence regimes with fluctuation imaging diagnostics in Wendelstein 7-X

Nuclear Fusion
Two density fluctuation imaging systems, phase contrast imaging (PCI) and gas puff imaging (GPI) measure spatially resolved density fluctuations with high time resolution throughout the core plasma (PCI) and in the scrape-off layer (GPI) of the ...
A. von Stechow, S.G. Baek, J.-P. Bähner, S. Ballinger, D. Cipciar, E.M. Edlund, G. Fuchert, O. Grulke, T. Gonda, S.K. Hansen, C. Killer, S. Kwak, M. Krychowiak, A. Langenberg, N. Pablant, E. Pasch, A. Pavone, M. Porkolab, J. Svensson, J.L. Terry, D. Zhang, the W7-X Team   +21 more
doaj   +1 more source

The effect of impurity seeding on edge toroidal rotation in the ADITYA-U tokamak

Nuclear Fusion
Intrinsic toroidal rotation velocity ( V _φ ) has been measured from the Doppler shift of C ^5+ carbon spectral lines (at 529.05 nm) in the edge region of the ADITYA-U tokamak without any auxiliary torque input in an ohmically heated pure hydrogen (H _2 )
Ankit Kumar, K. Shah, M.B. Chowdhuri, N. Ramaiya, Aman Gauttam, K.A. Jadeja, Bharat Hedge, N. Yadava, Kaushlender Singh, Suman Dolui, Tanmay Macwan, Ashok Kumawat, Pramila Gautam, Laxmikanta Pradhan, Harshita Raj, G. Shukla, Dipexa Modi, S. Patel, Soumitra Banerjee, Injamul Hoque, Komal, Suman Aich, Ankit Patel, Utsav, A. Kanik, Rohit Kumar, Priyanka Verma, K.M. Patel, Kalpesh Galodiya, M. Shah, R.L. Tanna, Joydeep Ghosh   +31 more
doaj   +1 more source

SOLPS-ITER modeling of neon-seeded EAST plasmas under connected double-null configurations and its impact on tungsten impurity behaviors

Nuclear Fusion
The SOLPS-ITER edge modeling package was employed to numerically investigate neon (Ne)-seeded EAST plasmas under connected-double-null configurations, focusing on Ne impurity transport and its impacts on tungsten (W) impurity behaviors.
Fuqiong Wang, R. Yan, Y.F. Xu, S.C. Liu, X.J. Zha, F.C. Zhong, Y. Liang, S.T. Mao, Y.M. Duan, L.Q. Hu   +9 more
doaj   +1 more source

Erosion enhancement by impurity entrainment in the highly collisional plasmas of Magnum-PSI

Nuclear Fusion
Extrinsic impurity seeding is planned for ITER to avoid high heat fluxes to the tungsten divertor targets. Nevertheless, excessive sputtering by impurities would lead to a reduction in fusion power output and divertor lifetime.
Mark J.H. Cornelissen, Jordy W.M. Vernimmen, Jesse D.E. Verstappen, Erwin Zoethout, Ivo G.J. Classen, Job Beckers, Thomas W. Morgan   +6 more
doaj   +1 more source

Crystallization Behavior of Hydroxypivalic Acid Neopentyl Glycol Ester. [PDF]

ACS Omega
Baek SH, Bae CH, Kim TH, Lee SK, Yoo SJ, Kang JW.   +5 more
europepmc   +1 more source

Study on the effect of ammonium (NH₄⁺) as impurity and seed ratio on batch cooling crystallization of nickel sulfate hexahydrate. [PDF]

Sci Rep
Andriyan MW, Yang J, Xu K, Hu Y, Nan T, Liu L, Yu Q.   +6 more
europepmc   +1 more source

Taming harmful bursts and heat flux in high-confinement tokamak plasmas. [PDF]

Nat Commun
Hu QM, Wang HQ, Navarro M, Wang HH, Eldon D, Gu S, Ma XX, Frerichs H, Scotti F, Wang L, Wilcox RS, Wilks TM, Bortolon A, Ceelen L, Effenberg F, Gong XZ, Jia MN, Kim SK, Lasnier CJ, Leonard AW, Li KD, Logan NC, Ma Q, Maingi R, Meng LY, Moser AL, Osborne TH, Paz-Soldan C, Shafer MW, Sun YW, Yang SM, Ye C.   +31 more
europepmc   +1 more source