Resistive wall modes in the EXTRAP T2R reversed-field pinch
2003 (English)In: Physics of Plasmas, ISSN 1070-664X, Vol. 10, 3823- p.Article in journal (Refereed) Published
Resistive wall modes (RWM) in the reversed field pinch are studied and a detailed comparison of experimental growth rates and linear magnetohydrodynamic (MHD) theory is made. RWM growth rates are experimentally measured in the thin shell device EXTRAP T2R [P. R. Brunsell , Plasma Phys. Controlled Fusion 43, 1 (2001)]. Linear MHD calculations of RWM growth rates are based on experimental equilibria. Experimental and linear MHD RWM growth rate dependency on the equilibrium profiles is investigated experimentally by varying the pinch parameter Theta=B-theta(a)/<B-phi> in the range Theta=1.5-1.8. Quantitative agreement between experimental and linear MHD growth rates is seen. The dominating RWMs are the internal on-axis modes (having the same helicity as the central equilibrium field). At high Theta, external nonresonant modes are also observed. For internal modes experimental growth rates decrease with Theta while for external modes, growth rates increase with Theta. The effect of RWMs on the reversed-field pinch plasma performance is discussed.
Place, publisher, year, edition, pages
2003. Vol. 10, 3823- p.
magnetohydrodynamic stability, shell, instabilities, configurations, rotation, distant, hbtx1c
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-5423DOI: 10.1063/1.1604775ISI: 000185422500003OAI: oai:DiVA.org:kth-5423DiVA: diva2:9785
QC 201009292006-03-082006-03-082011-12-12Bibliographically approved