期刊
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
卷 18, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevSTAB.18.121302
关键词
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资金
- German Research Foundation (DFG [SFB/TR18, EXC 158]
- Euratom research and training programme within the framework of the EUROfusion Consortium [633053]
- Max-Planck-Society
- Engineering and Physical Sciences Research Council [EP/H011145/1]
- Leverhulme Trust [F/08776/G]
- Engineering and Physical Sciences Research Council [EP/H011145/1] Funding Source: researchfish
- Science and Technology Facilities Council [ST/K001582/1, ST/J002011/1, ST/G008531/1, John Adams Institute, ST/J002011/1 John Adams Inst] Funding Source: researchfish
- EPSRC [EP/H011145/1] Funding Source: UKRI
- STFC [ST/K001582/1, ST/G008531/1, ST/J002011/1, John Adams Institute] Funding Source: UKRI
We present single-shot measurements of the longitudinal bunch profile from a laser-wakefield accelerator with sub-fs resolution, based on detection of coherent transition radiation in a broad spectral range. A previously developed phase retrieval algorithm enables reconstruction of the bunch profile without prior assumptions about its shape. In this study, a variable-length gas target is used to explore the dynamics of bunch evolution. Our results show that once the laser energy is depleted the time structure of the generated electron beam changes from a single bunch to a double bunch structure, well suited for driver-witness type experiments.
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