PAC2013 - List of Authors (Caspi, S.)

Paper	Title	Page
WEPBA12	3D Toroidal Field Multipoles for Curved Accelerator Magnets	907
	L.N. Brouwer, S. Caspi, D. Robin, W. Wan LBNL, Berkeley, California, USA
	Funding: Director, Office of Science, High Energy Physics, and U.S. Department of Energy under contract No. DE-AC02-05CH11231 National Science Foundation under grant No. DGE 1106400. Curved magnets producing continuously rotating field multipoles along the length of the bend can provide strong and continuous transverse focusing, making them of interest for accelerator systems such as compact ion beam gantries and synchrotron light sources. Evaluating the utility of such rotating multipole systems requires an accurate description of field behavior for beam physics calculations. This paper presents a helical scalar potential solution in 3D toroidal harmonics relevant to boundary conditions on the surface of a torus. The resulting fields are evaluated for a curved helical quadrupole channel to illustrate field rotation and the effect of magnet curvature.

Paper

Title

Page

3D Toroidal Field Multipoles for Curved Accelerator Magnets

907

L.N. Brouwer, S. Caspi, D. Robin, W. Wan
LBNL, Berkeley, California, USA

Funding: Director, Office of Science, High Energy Physics, and U.S. Department of Energy under contract No. DE-AC02-05CH11231 National Science Foundation under grant No. DGE 1106400.
Curved magnets producing continuously rotating field multipoles along the length of the bend can provide strong and continuous transverse focusing, making them of interest for accelerator systems such as compact ion beam gantries and synchrotron light sources. Evaluating the utility of such rotating multipole systems requires an accurate description of field behavior for beam physics calculations. This paper presents a helical scalar potential solution in 3D toroidal harmonics relevant to boundary conditions on the surface of a torus. The resulting fields are evaluated for a curved helical quadrupole channel to illustrate field rotation and the effect of magnet curvature.