Proton acceleration by irradiation of isolated spheres with an intense laser pulse

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dc.contributor.utaustinauthorDitmire, T.en_US
dc.contributor.utaustinauthorDonovan, M. E.en_US
dc.contributor.utaustinauthorDyer, G.en_US
dc.contributor.utaustinauthorGaul, E.en_US
dc.contributor.utaustinauthorGordon, J.en_US
dc.contributor.utaustinauthorHegelich, B. M.en_US
dc.contributor.utaustinauthorMartinez, M.en_US
dc.contributor.utaustinauthorMcCary, E.en_US
dc.contributor.utaustinauthorMeadows, A. R.en_US
dc.contributor.utaustinauthorSpinks, M.en_US
dc.contributor.utaustinauthorWagner, C.en_US
dc.creatorOstermayr, T. M.en_US
dc.creatorHaffa, D.en_US
dc.creatorHilz, P.en_US
dc.creatorPauw, V.en_US
dc.creatorAllinger, K.en_US
dc.creatorBamberg, K. U.en_US
dc.creatorBohl, P.en_US
dc.creatorBomer, C.en_US
dc.creatorBolton, P. R.en_US
dc.creatorDeutschmann, F.en_US
dc.creatorDitmire, T.en_US
dc.creatorDonovan, M. E.en_US
dc.creatorDyer, G.en_US
dc.creatorGaul, E.en_US
dc.creatorGordon, J.en_US
dc.creatorHegelich, B. M.en_US
dc.creatorKiefer, D.en_US
dc.creatorKlier, C.en_US
dc.creatorKreuzer, C.en_US
dc.creatorMartinez, M.en_US
dc.creatorMcCary, E.en_US
dc.creatorMeadows, A. R.en_US
dc.creatorMoschuring, N.en_US
dc.creatorRosch, T.en_US
dc.creatorRuhl, H.en_US
dc.creatorSpinks, M.en_US
dc.creatorWagner, C.en_US
dc.creatorSchreiber, J.en_US
dc.date.accessioned2017-07-18T20:09:09Z
dc.date.available2017-07-18T20:09:09Z
dc.date.issued2016-09en_US
dc.description.abstractWe report on experiments irradiating isolated plastic spheres with a peak laser intensity of 2-3 x 10(20) W cm(-2). With a laser focal spot size of 10 mu m full width half maximum (FWHM) the sphere diameter was varied between 520 nm and 19.3 mu m. Maximum proton energies of similar to 25 MeV are achieved for targets matching the focal spot size of 10 mu m in diameter or being slightly smaller. For smaller spheres the kinetic energy distributions of protons become nonmonotonic, indicating a change in the accelerating mechanism from ambipolar expansion towards a regime dominated by effects caused by Coulomb repulsion of ions. The energy conversion efficiency from laser energy to proton kinetic energy is optimized when the target diameter matches the laser focal spot size with efficiencies reaching the percent level. The change of proton acceleration efficiency with target size can be attributed to the reduced cross-sectional overlap of subfocus targets with the laser. Reported experimental observations are in line with 3D3V particle in cell simulations. They make use of well-defined targets and point out pathways for future applications and experiments.en_US
dc.description.departmentPhysicsen_US
dc.description.sponsorshipDFG via the Cluster of Excellence Munich-Centre for Advanced Photonics (MAP) Transregio SFB TR18en_US
dc.description.sponsorshipNNSA DE-NA0002008en_US
dc.description.sponsorshipSuper-MUC pr48meen_US
dc.description.sponsorshipIvo Cermaken_US
dc.description.sponsorshipCGC Instruments in design and realization of the Paul trap systemen_US
dc.description.sponsorshipIMPRS-APSen_US
dc.description.sponsorshipLMUexcellent Junior Research Funden_US
dc.description.sponsorshipDAAD|ToIFEen_US
dc.description.sponsorshipEuropean Union's Horizon research and innovation programme 633053en_US
dc.identifierdoi:10.15781/T2R20SB9X
dc.identifier.citationOstermayr, T. M., D. Haffa, P. Hilz, V. Pauw, K. Allinger, K-U. Bamberg, P. Böhl et al. "Proton acceleration by irradiation of isolated spheres with an intense laser pulse." Physical Review E 94, no. 3 (2016): 033208.en_US
dc.identifier.doi10.1103/PhysRevE.94.033208en_US
dc.identifier.issn2470-0045en_US
dc.identifier.urihttp://hdl.handle.net/2152/61064
dc.language.isoEnglishen_US
dc.relation.ispartofUT Faculty/Researcher Worksen_US
dc.relation.ispartofserialPhysical Review Een_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionopenen_US
dc.subjection-accelerationen_US
dc.subjectwater dropletsen_US
dc.subjectplasmaen_US
dc.subjectparticlesen_US
dc.subjectmassen_US
dc.titleProton acceleration by irradiation of isolated spheres with an intense laser pulseen_US
dc.typeArticleen_US

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