| Autor: |
Akli KU; The Ohio State University, Columbus, Ohio 43210, USA., Orban C, Schumacher D, Storm M, Fatenejad M, Lamb D, Freeman RR |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review. E, Statistical, nonlinear, and soft matter physics [Phys Rev E Stat Nonlin Soft Matter Phys] 2012 Dec; Vol. 86 (6 Pt 2), pp. 065402. Date of Electronic Publication: 2012 Dec 28. |
| DOI: |
10.1103/PhysRevE.86.065402 |
| Abstrakt: |
Cu wires attached to Al cones are used to investigate the energy coupling efficiency of laser light to fast electrons through a cone into a dense plasma. We present experimental and simulation results demonstrating the effect on the energy coupling of effectively placing the cone in a surrounding high density plasma as well as the effect of a large preformed plasma inside the cone. Thick cone walls, simulating plasma surrounding the cone in fast ignition, reduce the energy coupling by a factor of up to 4. An increase in prepulse inside the cone by a factor of 50 further reduces coupling by a factor of 3. Simulations with the pic code lsp that include the laser plasma interaction and the preformed plasma from the flash code show that electron refluxing in thin cone-wall targets enhances coupling to the wire. The implications for full-scale cone-guided fast ignition are discussed. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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