Development of a Superconducting Transverse-Gradient Undulator for Laser-Wakefield Accelerators

作者：Rodriguez Veronica Afonso^*; Bernhard Axel; Keilmann Alexander; Peiffer Peter; Rossmanith Robert; Widmann Christina; Baumbach Tilo; Nicolai Maria; Kaluza Malte C

来源：IEEE Transactions on Applied Superconductivity, 2013, 23(3): 4101505.

DOI：10.1109/TASC.2013.2240151

• Finite element methods
• plasma accelerators
• superconducting coils
• synchrotron radiation
• undulators

Relativistic electrons with small energy spread propagating through undulators produce monochromatic radiation with high spectral intensity. The working principle of undulators requires a small energy spread of the electron beam in the order of Delta E/ E similar to 0.1%. Laser-wakefield accelerators can produce electron bunches with an energy of several 100 MeV within a few millimeters acceleration length, but with a relatively large energy spread (Delta E/E similar to 1-10%). In order to produce monochromatic undulator radiation with these electrons, a novel scheme involving transverse-gradient superconducting undulators was proposed in an earlier work. This paper reports on the design-optimization and construction of an iron-free cylindrical superconducting undulator tailored to the particular beam properties of the laser-wakefield electron accelerator at the University of Jena, Germany.

• 出版日期2013-6