<empty>
Home Trabalhos Científicos Artigos em Revistas Científicas Plasma Physics Controlled Fusion

Plasma Physics Controlled Fusion
Bright spots generated by lower hybrid waves on JET
  K M Rantamäki1, V Petrzílka, P Andrew, I Coffey, A Ekedahl, K Erents, V Fuchs, M Goniche, G Granucci, E Joffrin, S J Karttunen, P Lomas, J Mailloux, M Mantsinen, M-L Mayoral, D C McDonald, J-M Noterdaeme, V Parail, A A Tuccillo, F Zácek and Contributors to the EFDA—JET Workprogramme
  2005
  DOI
 
Resumo
 
Observations of bright spots on the JET divertor aprons during lower hybrid current drive experiments are described. These bright spots are important because they can potentially cause damage to large tokamaks. The bright spots arise due to the impact of a fast particle beam. This beam originates from the front of the lower hybrid launcher, where thermal particles are accelerated according to theory by interaction with the high spatial harmonics of the lower hybrid wave. The bright spots are clearly related to the lower hybrid power as they disappear when the lower hybrid power is switched off. According to the analysis versus various parameters, the brightness of the spots clearly decreases with increasing plasma–wall distance, i.e. the distance between the last closed flux surface and the poloidal limiter. This is clearly beneficial for ITER, as it is designed to operate at a large plasma–wall distance.

 

Versão Portuguesa Englsih Version Páginia Inicial / Main Page

[ Artigos em Revistas Científicas ] [ Comunicações a Reuniões Científicas ] [ Teses de Mestrado ] [ Teses de Doutoramento ] [ Relatórios Internos ]

Webmaster
Copyright © 2008 Centro de Fusão Nuclear