Speaker
Halima Ali
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P5.1012.pdf
Effects of magnetic topology on axisymmetric divertors
Halima Ali1, Alkesh Punjabi1, and Allen Boozer2
1
Hampton University, Hampton, VA 23668, USA
2
Columbia University, New York, NY 10227, USA
The effects of the magnetic topology on the size and structure of points of intersection of
magnetic flux tubes is studied. Two distinct magnetic topologies are investigated: the open-
unbounded and the closed-compact. Open-unbounded magnetic topology is generically
represented by the simple map [A. Punjabi, A. Verma, and A. Boozer, Phys. Rev. Lett. 69,
3322 (1992)] and the closed-compact topology represented by the symmetric quartic map [M.
Jones et al, Phys. Plasmas 16, 042511 (2009)]. Identical magnetic perturbation is applied in
both topologies and field lines are given an artificial radial spiraling velocity. How the loss
time, the size, and the structure of the intersection points scale with the spiraling velocity is
studied and compared for both topologies; and from this comparison the effects of topology
on the axisymmetric divertor are evaluated. This work is supported by the US DOE grants
DE-FG02-01ER54624 and DE-FG02-04ER54793 to Hampton University. This research used
resources of the NERSC, supported by the Office of Science, US DOE, under Contract No.
DE-AC02-05CH11231.
