Alfvénic-turbulence-heated magnetic loops: Effects of lateral expansion and magnetic twist

Bo Li*, Xing Li

*Awdur cyfatebol y gwaith hwn

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

2 Dyfyniadau (Scopus)

Crynodeb

Using a 1.5-dimensional two-fluid magnetic loop model in which loops are heated by Alfvénic turbulence, we explore the effects on the loop parameters of the varying cross-section and the magnetic twist. The introduced magnetic twist is set to be around the kink instability threshold for a curved loop. It is found that: (i) The lateral expansion, which takes place close to footpoints, can significantly influence the heating profile, leading to a significant footpoint plasma flow. When observed on disc, the corresponding footpoint blue/red shift may be found for upper transition region lines, (ii) The effects introduced by magnetic twist are twofold. Firstly, the twist-related force may contribute to the axial force balance. Secondly, the projection effect reduces the electron and proton thermal conductivities. The former is found to be of little significance; however, the latter gives rise to considerable changes compared to the untwisted case.

Iaith wreiddiolSaesneg
Tudalennau (o-i)533-536
Nifer y tudalennau4
CyfnodolynPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Cyfrol364
Rhif cyhoeddi1839
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 15 Chwef 2006

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