Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Article number | 015003 |
---|---|
<mark>Journal publication date</mark> | 2/01/2013 |
<mark>Journal</mark> | Physical review letters |
Issue number | 1 |
Volume | 110 |
Number of pages | 5 |
Publication Status | Published |
<mark>Original language</mark> | English |
Using electron bunches generated by laser wakefield acceleration as a probe, the temporal evolution of magnetic fields generated by a 4 X 10(19) W/cm(2) ultrashort (30 fs) laser pulse focused on solid density targets is studied experimentally. Magnetic field strengths of order B-0 similar to 10(4) T are observed expanding at close to the speed of light from the interaction point of a high-contrast laser pulse with a 10-mu m-thick aluminum foil to a maximum diameter of similar to 1 mm. The field dynamics are shown to agree with particle-in-cell simulations. DOI: 10.1103/PhysRevLett.110.015003