Wepresentananalyticalandnumericalstudyoftheinteractionofamulti-petawatt,pancake-shaped laser pulsewithanunmagnetizedplasma.Thestudyhasbeenperformedintheultrarelativisticregimeof electron jittervelocities,inwhichtheplasmaelectronsarealmostcompletelyexpelledfromthepulse region. Thecalculationsareappliedtoalaserwake field accelerationschemewithspecifications that may beavailableinthenextgenerationofTi:Salasersandwiththeuseofrecentlydevelopedpulse compression techniques.Asetofnovelnonlinearequationsisderivedusingathree-timescaledescrip- tion, withanintermediatetimescaleassociatedwiththenonlinearphaseoftheelectromagneticwave and withthespatialbendingofitswavefront.Theydescribe,onanequalfooting,boththestrongandthe moderatelaserintensityregimes,pertinenttothecoreandtotheedgesofthepulse.
Semi-analytical fluid study of the laser wake field excitation in the strong intensity regime
S De Nicola
2016
Abstract
Wepresentananalyticalandnumericalstudyoftheinteractionofamulti-petawatt,pancake-shaped laser pulsewithanunmagnetizedplasma.Thestudyhasbeenperformedintheultrarelativisticregimeof electron jittervelocities,inwhichtheplasmaelectronsarealmostcompletelyexpelledfromthepulse region. Thecalculationsareappliedtoalaserwake field accelerationschemewithspecifications that may beavailableinthenextgenerationofTi:Salasersandwiththeuseofrecentlydevelopedpulse compression techniques.Asetofnovelnonlinearequationsisderivedusingathree-timescaledescrip- tion, withanintermediatetimescaleassociatedwiththenonlinearphaseoftheelectromagneticwave and withthespatialbendingofitswavefront.Theydescribe,onanequalfooting,boththestrongandthe moderatelaserintensityregimes,pertinenttothecoreandtotheedgesofthepulse.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
