2015 Fiscal Year Final Research Report
Highly intensified emission of laser-accelerated electrons from a foil plasma by controlling the density and electric field distributions
| Project/Area Number |
26800280
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Plasma science
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Keywords | 高強度レーザープラズマ / フェムト秒レーザー / レーザー加速 |
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| Outline of Final Research Achievements |
The laser-accelerated electron pulses have great potential for ultrafast science because of their high brightness and short bunch length. However, the majority of the fast electrons cannot escape from the laser irradiation target because they are trapped by a strong quasi-static electric field, called the sheath field, produced around the steep density gradient boundary. We suppressed the sheath field by using two time-delayed femtosecond laser pulses to control the electron density distributions of the target and substantially increase of the number of escaping electrons. The experimental results are well supported by numerical simulations and analytical evaluation.
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| Free Research Field |
プラズマ科学
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