期刊
PHYSICAL REVIEW LETTERS
卷 116, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.116.185003
关键词
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资金
- AFOSR [FA9550-14-1-0045]
- U.S. DOE-NNSA [DE-NA0002008]
- U.S. DOE [DE-FG02-04ER54742]
- DOE SCGF [DE-AC05-06OR23100]
- UK EPSRC [EP/G054940/1, EP/G055165/1, EP/G056803/1]
- EPSRC [EP/G055165/1, EP/G056803/1, EP/G054940/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G056803/1, EP/G054940/1] Funding Source: researchfish
We use numerical simulations to demonstrate that a source of collimated multi-MeV photons with high conversion efficiency can be achieved using an all-optical single beam setup at an intensity of 5 x 10(22) W/cm(2) that is already within reach of existing laser facilities. In the studied setup, an unprecedented quasistatic magnetic field (0.4 MT) is driven in a significantly overdense plasma, coupling three key aspects of laser-plasma interactions at high intensities: relativistic transparency, direct laser acceleration, and synchrotron photon emission. The quasistatic magnetic field enhances the photon emission process, which has a profound impact on electron dynamics via radiation reaction and yields tens of TW of directed MeV photons for a PW-class laser.
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