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학술지 Shock Ion Acceleration by an Ultrashort Circularly Polarized Laser Pulse Via Relativistic Transparency in an Exploded Target
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저자
김영국, 조명훈, 송형선, 강태연, 박형주, 정문연, 허민섭
발행일
201510
출처
Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, v.92 no.4, pp.1-6
ISSN
1539-3755
출판사
American Physical Society(APS)
DOI
https://dx.doi.org/10.1103/PhysRevE.92.043102
협약과제
14MC1200, 종양치료용 레이저 이온 가속 시스템 원천 기술 개발, 정문연
초록
We investigated ion acceleration by an electrostatic shock in an exploded target irradiated by an ultrashort, circularly polarized laser pulse by means of one- and three-dimensional particle-in-cell simulations. We discovered that the laser field penetrating via relativistic transparency (RT) rapidly heated the upstream electron plasma to enable the formation of a high-speed electrostatic shock. Owing to the RT-based rapid heating and the fast compression of the initial density spike by a circularly polarized pulse, a new regime of the shock ion acceleration driven by an ultrashort (20-40 fs), moderately intense (1-1.4 PW) laser pulse is envisaged. This regime enables more efficient shock ion acceleration under a limited total pulse energy than a linearly polarized pulse with crystal laser systems of {\\lambda}~1μm.
KSP 제안 키워드
Circularly polarized laser pulse, Electron plasma, High Speed, Ion acceleration, Laser field, Linearly polarized, Particle-in-Cell simulations, Pulse energy, Rapid heating, Three dimensional(3D)