Controlling the spectrum of x-rays generated in a laser-plasma accelerator by tailoring the laser wavefront
Publikation/Tidskrift/Serie: Applied Physics Letters
Förlag: American Institute of Physics
Övrig information: Copyright (2009) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
By tailoring the wavefront of the laser pulse used in a laser-wakefield accelerator, we show that the properties of the x-rays produced due to the electron beam's betatron oscillations in the plasma can be controlled. By creating a wavefront with coma, we find that the critical energy of the synchrotronlike x-ray spectrum can be significantly increased. The coma does not substantially change the energy of the electron beam, but does increase its divergence and produces an energy-dependent exit angle, indicating that changes in the x-ray spectrum are due to an increase in the electron beam's oscillation amplitude within the wakefield.
- Physics and Astronomy
- plasma X-ray sources
- plasma accelerators
- ISSN: 0003-6951