Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Freethy Simon"'
Publikováno v:
EPJ Web of Conferences, Vol 277, p 01009 (2023)
Spherical tokamaks like the MAST Upgrade device are often operated in an overdense regime. As a consequence, conventional electron cyclotron resonance heating (ECRH) and current drive (ECCD) are typically not possible. MAST Upgrade is planned to inve
Externí odkaz:
https://doaj.org/article/08e174ab10b04d49b722d2a0f21fdaec
Autor:
Webster Helen, Freethy Simon, Henderson Mark, Allen Joe, Caretta Ottone, Desai Shail, Holden James, Maszczyk Dariusz, Melidis Elias, Meyer Hendrik, Muir Ewan, Munasinghe Asanka, Surendran Santhosh
Publikováno v:
EPJ Web of Conferences, Vol 277, p 04004 (2023)
MAST-Upgrade (MAST-U) is undergoing several enhancements to deliver increased performance and functionality. One such enhancement is the design, development, and implementation of an Electron Bernstein Wave (EBW) Heating and Current Drive (HCD) Syste
Externí odkaz:
https://doaj.org/article/511dbc790fd14303aba542155adf2229
Publikováno v:
EPJ Web of Conferences, Vol 277, p 01010 (2023)
Three full-wave codes for simulating microwave propagation and O-SX mode conversion in magnetized plasma are described and compared. Their feasibility to investigate mode conversion processes and obtain conversion efficiencies for parameters relevant
Externí odkaz:
https://doaj.org/article/37faaaf70e00414b87cb8f6c71131d1d
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:
Freethy Simon J., Görler Tobias, Creely Alex J., Conway Garrard D., Denk Severin S., Happel Tim, Henniquin Pascale, Koenen Christian, White Anne E.
Publikováno v:
EPJ Web of Conferences, Vol 203, p 03001 (2019)
Guided by predictions from nonlinear gyrokinetic simulations, two new turbulence diagnostics were designed and installed at ASDEX Upgrade (AUG) to probe the fundamentals of ion-scale turbulent electron heat transport. The first, a 30-channel correlat
Externí odkaz:
https://doaj.org/article/011ea87fdde64c98beab73c127a4a66d
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
Publikováno v:
EPJ Web of Conferences, Vol 87, p 03008 (2015)
Bursts of microwave emission are observed during ELM events on the Mega Ampère Spherical Tokamak. In agreement with observations on other machines, these bursts are up to 3 orders of magnitude more intense than the thermal background, but are electr
Externí odkaz:
https://doaj.org/article/9d4c3248c8fd434283ca7bc43cb2477d
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Akademický článek
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