Study of stability and rotation of a chain of saturated, freely-rotating magnetic islands in tokamaks

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F21%3A00543310" target="_blank" >RIV/61389021:_____/21:00543310 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/21:10432144 RIV/68407700:21340/21:00353906

Result on the web

<a href="https://iopscience.iop.org/article/10.1088/1361-6587/abfbbd" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6587/abfbbd</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6587/abfbbd" target="_blank" >10.1088/1361-6587/abfbbd</a>

Result language

angličtina

Original language name

Study of stability and rotation of a chain of saturated, freely-rotating magnetic islands in tokamaks

Original language description

The non-linear dynamics of a chain of stationary, saturated magnetic islands is studied by solving a four-field system of equations that include non-ideal effects, lowest order finite Larmor radius corrections and neoclassical terms. The magnetic island rotation velocity is calculated self-consistently with the fields profiles. The solutions for the island rotation velocity and for the ion polarization current are determined as a function of the characteristic parameters of the system and the results are discussed. The results of the calculations show that island rotation velocity and the ion polarization current depend in a non-trivial way on the parameters characterizing the system, and some clear patterns emerge only in particular cases. An analysis of magnetic island rotation velocity is performed on experiments in COMPASS tokamak. Measured island rotation velocity is compared with the calculated ion and electron flow velocities, for different hypotheses on the toroidal rotation of the plasma. The comparison shows that the island rotation velocity is consistent with the ion flow velocity, under the hypothesis of slow toroidal rotation and low collisionality. Theoretical calculation of the island rotation velocity according to the model here developed suggests that the islands rotate weakly in the ion direction, in the hypothesis of slow toroidal rotation and high collisionality. The impossibility of directly measuring the plasma rotation velocity makes it difficult to distinguish between these different regimes.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

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

Name of the periodical

Plasma Physics and Controlled Fusion

ISSN

0741-3335

e-ISSN

1361-6587

Volume of the periodical

63

Issue of the periodical within the volume

7

Country of publishing house

GB - UNITED KINGDOM

Number of pages

16

Pages from-to

074004

UT code for WoS article

000657941000001

EID of the result in the Scopus database

—