Full wave 2D Theory of LH Grills suitable for large structure

0371204 - ÚFP 2012 RIV US eng C - Conference Paper (international conference)
Preinhaelter, Josef - Urban, Jakub - Vahala, L. - Vahala, G. - Záruba, M.
Full wave 2D Theory of LH Grills suitable for large structure.
AIP Conference Proceedings 1406. Vol. 1406. New York: American Institute of Physics, 2011 - (Phillips, C.; Wilson, J.), s. 149-152. AIP Conference Proceedings, 1406. ISBN 978-0-7354-0978-1.
[Topical Conference on Radio Frequency Power in Plasmas/19./. Newport (US), 01.06.2011-03.06.2011]
R&D Projects: GA ČR GA202/08/0419
Institutional research plan: CEZ:AV0Z20430508
Keywords : Tokamak * Lower Hybrid waves * Grill coupling * COMPASS * full wave
Subject RIV: BL - Plasma and Gas Discharge Physics
http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=APCPCS001406000001000149000001&idtype=cvips&doi=10.1063/1.3664950&prog=normal

Fast algorithm for the full wave solution of lower hybrid wave-guide grill is developed. Propagation of waves in collisional cold plasma is solved by finite elements method with adaptive mesh of nodes and also adaptive length of the integration interval. Application of high order Gauss rule in accessibility region and trapezoidal rule with iteratively tabulated integrand in inaccessibility region allow to use one mesh points for plasma related part of integrands for all coupling admitances. This mesh of solutions is independent on the grill parameters so it could be used for arbitrary structure. We have determined precisely which part of the radiated power by the waveguide grill goes to standing waves in the inaccessible region.
Permanent Link: http://hdl.handle.net/11104/0006811