Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Speirs, David"'
Autor:
Speirs, David C., Ruiz-Ruiz, Juan, Giacomin, Maurizio, Hall-Chen, Valerian H., Phelps, Alan D. R., Vann, Roddy, Huggard, Peter G., Wang, Hui, Field, Anthony, Ronald, Kevin
Plasma turbulence on disparate spatial and temporal scales plays a key role in defining the level of confinement achievable in tokamaks, with the development of reduced numerical models for cross-scale turbulence effects informed by experimental meas
Externí odkaz:
http://arxiv.org/abs/2408.15807
Autor:
Hall-Chen, Valerian H., Parra, Felix I., Hillesheim, Jon C., Ruiz, Juan Ruiz, Crocker, Neal A., Shi, Peng, Chu, Hong Son, Freethy, Simon J., Kogan, Lucy A., Peebles, William A., Pratt, Quinn T., Rhodes, Terry L., Ronald, Kevin, Scannell, Rory, Speirs, David C., Storment, Stephen, Trisno, Jonathan
The Doppler backscattering (DBS) diagnostic, also referred to as Doppler reflectometry, measures turbulent density fluctuations of intermediate length scales. However, when the beam's wavevector is not properly aligned perpendicular to the magnetic f
Externí odkaz:
http://arxiv.org/abs/2211.17141
Akademický článek
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Autor:
Wilson Thomas, Freethy Simon, Henderson Mark, Köhn-Seeman Alf, Konoplev Ivan, Saarelma Samuli, Speirs David, Vann Roddy
Publikováno v:
EPJ Web of Conferences, Vol 277, p 01011 (2023)
GENRAY and CQL3D were used to estimate the Electron Bernstein Wave (EBW) current drive profiles and normalised current drive efficiency ζCD (6) for several STEP reactor concepts with varying temperature, density, geometry and magnetic field. ζCD >
Externí odkaz:
https://doaj.org/article/67a911a716cd423bba877cb07c5dad7c
Autor:
Freethy Simon, Figini Lorenzo, Henderson Mark, El-Haroun Hana, Eliason Bengt, Gibson Sam, Kirov Krassimir, Köhn-Seemann Alf, Konoplev Ivan, Saarelma Samuli, Sharma Ridhima, Speirs David, Vann Roddy, Webster Helen, Wilson Thomas
Publikováno v:
EPJ Web of Conferences, Vol 277, p 04001 (2023)
The UK’s Spherical Tokamak for Energy Production (STEP) reactor design program has recently taken the decision to use exclusively microwave-based heating and current drive (HCD) actuators for its reactor concepts. This is based on a detailed assess
Externí odkaz:
https://doaj.org/article/a314240aa5b342c28da57083840a0a4b
Autor:
Wilson, Kieran J, Selman, Liam, Whyte, Colin G, MacInnes, Philip, Young, Alan R, Phelps, Alan R, Cross, Adrian W, Zhang, Liang, Eliasson, Bengt, Speirs, David C, Robertson, Craig W, Ronald, Kevin, Cairns, Robert, Alan, Bingham, Robert, Bamford, Ruth, Koepke, Mark E
Publikováno v:
63rd Annual Meeting of the APS Division of Plasma Physics
As a non-linear medium, parametric instabilities arise when powerful EM waves propagate in plasma. Such effects are seen in laser-plasma, RF–ionospheric and tokamak heating scenarios. Fusion plasmas in a spherical aspect tokamak are difficult to he
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=core_ac_uk__::c7d03ab5745d5e7a93b5d89febd7c98e
https://strathprints.strath.ac.uk/79446/1/Wilson_etal_APS_2021_Characterisation_oga_helicon_source_for_non_linear_microwave_coupling_experiments_in_a_magnetised_plasma.pdf
https://strathprints.strath.ac.uk/79446/1/Wilson_etal_APS_2021_Characterisation_oga_helicon_source_for_non_linear_microwave_coupling_experiments_in_a_magnetised_plasma.pdf
Autor:
Speirs, David L.
The precipitation of nitrogen fron iron-molybdenum-nitrogen alloys has been studied by X-ray, electron microscopic and optical metallographic techniques in the temperature range 100 - 800°C. By experimental control of reaction conditions, nine diffe
Externí odkaz:
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.550314
Publikováno v:
In Resources, Conservation & Recycling 2001 31(2):149-170
Ionospheric heating experiments using high frequency ordinary (O) mode electromagnetic waves have shown the induced formation of magnetic field-aligned density striations in the ionospheric F-region. These striations are observed in association with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=core_ac_uk__::2199c3b61d8cf401a989c4a8da684cb0
https://strathprints.strath.ac.uk/61896/8/Spiers_etal_JGRSP_2017_Two_dimensional_Vlasov_simulations_of_fast_stochastic_electron_heating.pdf
https://strathprints.strath.ac.uk/61896/8/Spiers_etal_JGRSP_2017_Two_dimensional_Vlasov_simulations_of_fast_stochastic_electron_heating.pdf