期刊
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
卷 13, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevSTAB.13.091301
关键词
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资金
- DFG [TR18]
- Association EURATOM-Max-Planck-Institut fuer Plasmaphysik
- Munich Centre for Advanced Photonics (MAP)
- Laserlab-Europe/Labtech [228334]
- Alexander von Humbold Foundation
- RFBR [08-02-01245-a, 08-02-01137-a]
- Engineering and Physical Sciences Research Council [EP/D06337X/1] Funding Source: researchfish
- EPSRC [EP/D06337X/1] Funding Source: UKRI
We demonstrate a laser wakefield accelerator with a novel electron injection scheme resulting in enhanced stability, reproducibility, and ease of use. In order to inject electrons into the accelerating phase of the plasma wave, a sharp downward density transition is employed. Prior to ionization by the laser pulse this transition is formed by a shock front induced by a knife edge inserted into a supersonic gas jet. With laser pulses of 8 fs duration and with only 65 mJ energy on target, the accelerator produces a monoenergetic electron beam with tunable energy between 15 and 25 MeV and on average 3.3 pC charge per electron bunch. The shock-front injector is a simple and powerful new tool to enhance the reproducibility of laser-driven electron accelerators, is easily adapted to different laser parameters, and should therefore allow scaling to the energy range of several hundred MeV.
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