Home > Research > Publications & Outputs > Measurement of Magnetic-Field Structures in a L...


Text available via DOI:

View graph of relations

Measurement of Magnetic-Field Structures in a Laser-Wakefield Accelerator

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • M. C. Kaluza
  • H. -P. Schlenvoigt
  • S. P. D. Mangles
  • A. G. R. Thomas
  • A. E. Dangor
  • H. Schwoerer
  • W. B. Mori
  • Z. Najmudin
  • K. M. Krushelnick
Article number115002
<mark>Journal publication date</mark>7/09/2010
<mark>Journal</mark>Physical review letters
Issue number11
Number of pages4
Publication StatusPublished
<mark>Original language</mark>English


Experimental measurements of magnetic fields generated in the cavity of a self-injecting laser-wakefield accelerator are presented. Faraday rotation is used to determine the existence of multimegagauss fields, constrained to a transverse dimension comparable to the plasma wavelength similar to lambda(p) and several lambda(p) longitudinally. The fields are generated rapidly and move with the driving laser. In our experiment, the appearance of the magnetic fields is correlated with the production of relativistic electrons, indicating that they are inherently tied to the growth and wave breaking of the nonlinear plasma wave. This evolution is confirmed by numerical simulations, showing that these measurements provide insight into the wakefield evolution with high spatial and temporal resolution.