Pulse shape optimization for electron-positron production in rotating fields
| Autor: | François Fillion-Gourdeau, Florian Hebenstreit, Steve MacLean, Denis Gagnon |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Quantum Physics 530 Physics 010308 nuclear & particles physics Linear polarization Numerical analysis FOS: Physical sciences Parameter space 01 natural sciences Computational physics High Energy Physics - Phenomenology Polynomial basis High Energy Physics - Phenomenology (hep-ph) Classical mechanics Pair production Electric field Differential evolution 0103 physical sciences Shape optimization Quantum Physics (quant-ph) 010306 general physics |
| Zdroj: | Physical Review D. 96 |
| ISSN: | 2470-0029 2470-0010 |
| Popis: | We optimize the pulse shape and polarization of time-dependent electric fields to maximize the production of electron-positron pairs via strong field quantum electrodynamics processes. The pulse is parametrized in Fourier space by a B-spline polynomial basis, which results in a relatively low-dimensional parameter space while still allowing for a large number of electric field modes. The optimization is performed by using a parallel implementation of the differential evolution, one of the most efficient metaheuristic algorithms. The computational performance of the numerical method and the results on pair production are compared with a local multistart optimization algorithm. These techniques allow us to determine the pulse shape and field polarization that maximize the number of produced pairs in computationally accessible regimes. Comment: 16 pages, 10 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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