Radial Confinement in Non-Symmetric Quadrupolar Mirrors
2013 (English)In: Journal of fusion energy, ISSN 0164-0313, E-ISSN 1572-9591, Vol. 32, no 3, 327-335 p.Article in journal (Refereed) Published
Charged particles in symmetric quadrupolar mirrors are radially confined and have an associated radial invariant. In a symmetric quadrupolar field the magnetic field modulus satisfies B(z)=−B(z) along the axis if z = 0 defines the field minimum of the mirror, and the quadrupolar field has a corresponding symmetry. The field in the anchor cells of a tandem mirror need not obey a corresponding symmetry. In this paper, the radial confinement of non-symmetric mirrors is examined by tracing sample ions in the magnetic field. It is found that for non-symmetric mirrors, particles are typically not confined, and no radial invariant exists for such devices. Without attention to this effect in the field and coil design, radial confinement of trapped particles may be lost.
Place, publisher, year, edition, pages
Springer, 2013. Vol. 32, no 3, 327-335 p.
Quadrupolar mirror machine, radial transport
Physical Sciences Engineering and Technology
Research subject Physics with specialization in Space and Plasma Physics; Engineering Science with specialization in Science of Electricity
IdentifiersURN: urn:nbn:se:uu:diva-183354DOI: 10.1007/s10894-012-9573-xISI: 000317973500003OAI: oai:DiVA.org:uu-183354DiVA: diva2:562504