2022 Fiscal Year Annual Research Report
Anomalous Ion Acceleration Mechanism in Intense Laser-Irradiated Graphene
| Project/Area Number |
22J11038
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| Allocation Type | Single-year Grants |
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| Research Institution | Tohoku University |
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Principal Investigator |
KUMAR HARIHARA SUDHAN 東北大学, 工学研究科, 特別研究員(DC2)
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| Project Period (FY) |
2022-04-22 – 2024-03-31
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| Keywords | Laser acceleration / Hybrid simulation / Molecular Dynamics / Particle-in-cell / RPA / TNSA / Graphene |
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| Outline of Annual Research Achievements |
The motivation of this research is to identify the anomalous acceleration mechanism due to which, extremely high energy carbon ions are generated only from an ultra-thin graphene target, when irradiated with an ultra-intense laser. The hypothesis was that the laser prepulse modifies the target structure thus affecting the ion acceleration. However, there were no pre-existing methods to test this hypothesis. Hence, we proposed a hybrid simulation scheme where the prepulse is modeled using molecular dynamics (MD) simulation and then combined with electromagnetic (EM) plasma simulation for the main pulse. Over the FY2022, we succeeded in creating a hybrid simulation that combines MD and EM simulations. The validation study for this simulation showed good agreement with a previous experiment.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The progress made is exactly following the schedule proposed in the DC2 proposal. Since the MD simulation was able to be validated, it was able to be used to identify the anomalous acceleration mechanism.
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| Strategy for Future Research Activity |
Since the progress of the research is following the schedule, currently, we are performing parametric simulation studies to explore the anomalous acceleration mechanism for various laser pulse and target conditions.
A theoretical model describing the anomalous acceleration mechanism has also been developed and the numerical simulation results are expected to be validated using the theory.
Finally, it is important to publish this work and hence, we are currently preparing 2 articles which will be submitted to peer-review journals. Also, there are plans to apply for international conferences where we expect to present the research.
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