NAPAC2016 - List of Authors (Fukushima, K.)

Paper

Title

Page

WEA4IO01

Dynamics of Beams With Canonical Angular Momentum in Non-Axisymmetric Optical Elements

use link to see paper's listing under its alternate paper code

C.Y. Wong
NSCL, East Lansing, Michigan, USA
K. Fukushima, S.M. Lund
FRIB, East Lansing, USA

Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661 and the National Science Foundation under Grant No. PHY-1102511.
Magnetized beams emerging from electron cyclotron resonance (ECR) ion sources have large statistical canonical angular momentum that substantially alters the beam dynamics. This paper examines the single-particle dynamics of such beams in non-axisymmetric lattice elements. The work supports commissioning activities at the FRIB Front End by illustrating how xy projections of the components of a multi-species beam become tilted due to dipoles and quadrupoles, which can complicate charge state selection with slits. The results help guide simulations performed using the PIC code WARP to achieve better optimization of the collimation in the charge selection system (CSS). Beam statistical angular momentum also evolves in the CSS which in turn changes the x- and y-plane emittances. Possible implications of this effect on the final thermalized beam emittances delivered by the Front End are discussed.

Slides WEA4IO01 [21.961 MB]

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper	Title	Page
WEA4IO01	Dynamics of Beams With Canonical Angular Momentum in Non-Axisymmetric Optical Elements
SUPO50	use link to see paper's listing under its alternate paper code
	C.Y. Wong NSCL, East Lansing, Michigan, USA K. Fukushima, S.M. Lund FRIB, East Lansing, USA
	Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661 and the National Science Foundation under Grant No. PHY-1102511. Magnetized beams emerging from electron cyclotron resonance (ECR) ion sources have large statistical canonical angular momentum that substantially alters the beam dynamics. This paper examines the single-particle dynamics of such beams in non-axisymmetric lattice elements. The work supports commissioning activities at the FRIB Front End by illustrating how xy projections of the components of a multi-species beam become tilted due to dipoles and quadrupoles, which can complicate charge state selection with slits. The results help guide simulations performed using the PIC code WARP to achieve better optimization of the collimation in the charge selection system (CSS). Beam statistical angular momentum also evolves in the CSS which in turn changes the x- and y-plane emittances. Possible implications of this effect on the final thermalized beam emittances delivered by the Front End are discussed.
	Slides WEA4IO01 [21.961 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)