IPAC2011 - List of Authors (Schoerling, D.)

Paper	Title	Page
THPC158	Field Optimization for Short Period Undulators	3260
	P. Peiffer, A. Bernhard KIT, Karlsruhe, Germany R. Rossmanith Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany D. Schoerling CERN, Geneva, Switzerland
	Undulators dedicated to low energy electron beams, like Laser Wakefield Accelerators, require very short period lengths to achieve X-ray emission. However, at these short period lengths (~5 mm) it becomes difficult to reach magnetic field amplitudes that lead to a K parameter of ~1, which is generally desired. Room temperature permanent magnets and even superconductive undulators using Nb-Ti as conductor material have proven insufficient to achieve the desired field amplitudes. The superconductor Nb3Sn has the theoretical potential to achieve the desired fields. However, up to now it is limited by several technological challenges to much lower field values than theoretically predicted. Alternatives for higher fields would be to manufacture the poles of the undulator body from Holmium instead of iron or to use Nb-Ti wires with a higher superconductor/copper ratio. The advantages and challenges of the different options are compared in this contribution.

Paper

Title

Page

Field Optimization for Short Period Undulators

3260

P. Peiffer, A. Bernhard
KIT, Karlsruhe, Germany
R. Rossmanith
Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
D. Schoerling
CERN, Geneva, Switzerland

Undulators dedicated to low energy electron beams, like Laser Wakefield Accelerators, require very short period lengths to achieve X-ray emission. However, at these short period lengths (~5 mm) it becomes difficult to reach magnetic field amplitudes that lead to a K parameter of ~1, which is generally desired. Room temperature permanent magnets and even superconductive undulators using Nb-Ti as conductor material have proven insufficient to achieve the desired field amplitudes. The superconductor Nb3Sn has the theoretical potential to achieve the desired fields. However, up to now it is limited by several technological challenges to much lower field values than theoretically predicted. Alternatives for higher fields would be to manufacture the poles of the undulator body from Holmium instead of iron or to use Nb-Ti wires with a higher superconductor/copper ratio. The advantages and challenges of the different options are compared in this contribution.