Full Wave 2D Theory of LH Grills Suitable for Large Structures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F11%3A00439695" target="_blank" >RIV/61389021:_____/11:00439695 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1063/1.3664950" target="_blank" >http://dx.doi.org/10.1063/1.3664950</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.3664950" target="_blank" >10.1063/1.3664950</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Full Wave 2D Theory of LH Grills Suitable for Large Structures

Popis výsledku v původním jazyce

Lower hybrid waves are very important for heating and current drive in contemporary tokamaks.Phased arrays of rectangular waveguides are frequently used as launcher. While the simple theory of parallel plate waveguide coupling to the plasma slab with thelinear density profile was successful [1],it neglected the coupling of the fast to slow wave in the inaccessibility region and could not handle the effect of the poloidal field. These drawbacks were overcome by 2D grill theory assuming rectangular waveguides and the full wave solution in the plasma [2].However, this method is rarely used for large structures as it requires the evaluation of a very large number of 2D infinite integrals in k-space [3].Here,we overcome this drawback by using high order Gaussian quadratures and 2D B-splines of the integrands in N-pol,N-tor-space.We adopt efficient and accurate methods of handling the eigenmodes excited by the LH grill in the inaccessible N-tor -region and clarify the role of collisions.

Název v anglickém jazyce

Full Wave 2D Theory of LH Grills Suitable for Large Structures

Popis výsledku anglicky

Lower hybrid waves are very important for heating and current drive in contemporary tokamaks.Phased arrays of rectangular waveguides are frequently used as launcher. While the simple theory of parallel plate waveguide coupling to the plasma slab with thelinear density profile was successful [1],it neglected the coupling of the fast to slow wave in the inaccessibility region and could not handle the effect of the poloidal field. These drawbacks were overcome by 2D grill theory assuming rectangular waveguides and the full wave solution in the plasma [2].However, this method is rarely used for large structures as it requires the evaluation of a very large number of 2D infinite integrals in k-space [3].Here,we overcome this drawback by using high order Gaussian quadratures and 2D B-splines of the integrands in N-pol,N-tor-space.We adopt efficient and accurate methods of handling the eigenmodes excited by the LH grill in the inaccessible N-tor -region and clarify the role of collisions.

Druh

D - Stať ve sborníku

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

AIP Conference Proceedings :Book series: RADIO FREQUENCY POWER IN PLASMAS: PROCEEDINGS OF THE 19TH TOPICAL CONFERENCE

ISBN

978-0-7354-0978-1

ISSN

0094-243X

e-ISSN

—

Počet stran výsledku

4

Strana od-do

149-152

Název nakladatele

American Institute of Physics

Místo vydání

MELVILLE

Místo konání akce

Newport

Datum konání akce

1. 6. 2011

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000301041300034