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Enhanced hot-electron localization and heating in high-contrast ultraintense laser irradiation of microcone targets.
- Source :
-
Physical review. E, Statistical, nonlinear, and soft matter physics [Phys Rev E Stat Nonlin Soft Matter Phys] 2009 Mar; Vol. 79 (3 Pt 2), pp. 036408. Date of Electronic Publication: 2009 Mar 31. - Publication Year :
- 2009
-
Abstract
- We report experiments demonstrating enhanced coupling efficiencies of high-contrast laser irradiation to nanofabricated conical targets. Peak temperatures near 200 eV are observed with modest laser energy (10 J), revealing similar hot-electron localization and material heating to reduced mass targets (RMTs), despite having a significantly larger mass. Collisional particle-in-cell simulations attribute the enhancement to self-generated resistive (approximately 10 MG) magnetic fields forming within the curvature of the cone wall, which confine energetic electrons to heat a reduced volume at the tip. This represents a different electron confinement mechanism (magnetic, as opposed to electrostatic sheath confinement in RMTs) controllable by target shape.
Details
- Language :
- English
- ISSN :
- 1539-3755
- Volume :
- 79
- Issue :
- 3 Pt 2
- Database :
- MEDLINE
- Journal :
- Physical review. E, Statistical, nonlinear, and soft matter physics
- Publication Type :
- Academic Journal
- Accession number :
- 19392065
- Full Text :
- https://doi.org/10.1103/PhysRevE.79.036408