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Original title:
OLGA – efficient full wave code for the coupling of LH grills
Authors: Preinhaelter, Josef ; Hillairet, J. ; Urban, Jakub
Document type: Papers
Conference/Event: 45th EPS Conference on Plasma Physics, Praha (CZ), 20180702
Year: 2018
Language: eng
Abstract: The full wave code OLGA, for determining the coupling of a single row lower hybrid launcher (waveguide grills) to the plasma, is extended to handle multirow multijunction active passive structures (like the C3 and C4 launchers on TORE SUPRA) by implementing the scattering matrix formalism. The extended code is still computationally fast because of the use of (i) 2D splines of the plasma surface admittance in the accessibility region of the k-space, (ii) high order Gaussian quadrature rules for the integration of the coupling elements and (iii) utilizing the symmetries of the coupling elements in the multiperiodic structures. The extended OLGA code is benchmarked against the ALOHA-1D, ALOHA-2D and TOPLHA codes for the coupling of the C3 and C4 TORE SUPRA launchers for several plasma configurations derived from reflectometry and interferometery. Unlike nearly all codes (except the ALOHA-1D code), OLGA does not require large computational resources and can be used for everyday usage in planning experimental runs. In particular, it is shown that the OLGA code correctly handles the coupling of the C3 and C4 launchers over a very wide range of plasma densities in front of the grill.
Keywords: coupling; full-wave; large multirow multijunction grills; lower hybrid waves; tokamak
Project no.: 8D15001 (CEP), LM2015045 (CEP)
Funding provider: GA MŠk, GA MŠk
Host item entry: 45th EPS Conference on Plasma Physics, europhysics conference abstracts, ISBN 979-10-96389-08-7
Institution: Institute of Plasma Physics AS ČR (web)
Document availability information: Fulltext is available at external website.
External URL: http://ocs.ciemat.es/EPS2018PAP/pdf/P1.1069.pdf
Original record: http://hdl.handle.net/11104/0289239
Permalink: http://www.nusl.cz/ntk/nusl-387727
The record appears in these collections:
Research > Institutes ASCR > Institute of Plasma Physics
Conference materials > Papers
Authors: Preinhaelter, Josef ; Hillairet, J. ; Urban, Jakub
Document type: Papers
Conference/Event: 45th EPS Conference on Plasma Physics, Praha (CZ), 20180702
Year: 2018
Language: eng
Abstract: The full wave code OLGA, for determining the coupling of a single row lower hybrid launcher (waveguide grills) to the plasma, is extended to handle multirow multijunction active passive structures (like the C3 and C4 launchers on TORE SUPRA) by implementing the scattering matrix formalism. The extended code is still computationally fast because of the use of (i) 2D splines of the plasma surface admittance in the accessibility region of the k-space, (ii) high order Gaussian quadrature rules for the integration of the coupling elements and (iii) utilizing the symmetries of the coupling elements in the multiperiodic structures. The extended OLGA code is benchmarked against the ALOHA-1D, ALOHA-2D and TOPLHA codes for the coupling of the C3 and C4 TORE SUPRA launchers for several plasma configurations derived from reflectometry and interferometery. Unlike nearly all codes (except the ALOHA-1D code), OLGA does not require large computational resources and can be used for everyday usage in planning experimental runs. In particular, it is shown that the OLGA code correctly handles the coupling of the C3 and C4 launchers over a very wide range of plasma densities in front of the grill.
Keywords: coupling; full-wave; large multirow multijunction grills; lower hybrid waves; tokamak
Project no.: 8D15001 (CEP), LM2015045 (CEP)
Funding provider: GA MŠk, GA MŠk
Host item entry: 45th EPS Conference on Plasma Physics, europhysics conference abstracts, ISBN 979-10-96389-08-7
Institution: Institute of Plasma Physics AS ČR (web)
Document availability information: Fulltext is available at external website.
External URL: http://ocs.ciemat.es/EPS2018PAP/pdf/P1.1069.pdf
Original record: http://hdl.handle.net/11104/0289239
Permalink: http://www.nusl.cz/ntk/nusl-387727
The record appears in these collections:
Research > Institutes ASCR > Institute of Plasma Physics
Conference materials > Papers
Record created 2018-11-15, last modified 2021-11-24