期刊
PHYSICAL REVIEW LETTERS
卷 105, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.115002
关键词
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资金
- DFG [TR18]
- BMBF [03ZIK052]
- Royal Society
- U.S. DOE
- NSF
- Engineering and Physical Sciences Research Council [EP/I014462/1, EP/H00601X/1] Funding Source: researchfish
- EPSRC [EP/H00601X/1, EP/I014462/1] Funding Source: UKRI
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.
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