Free Access

Fig. 8

image

Regularization of a bi-symmetric (m = 1) spiral magnetic field that diverges for r → 0. Upper panel:field as given by Eq. (36), where Br ∝ 1∕r, so that all field lines meet at r = 0. Bottom panel: modified field inside radius r′ = R∕10 (Eq. (43)), so that field lines now avoid the center.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.