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Article Dans Une Revue Nuclear Instruments and Methods in Physics Research Année : 2010

A methodforestimatingthetemperatureinhighenergydensityfreeelectron laser experiments

Résumé

Presentandforthcomingfreeelectronlaser(FEL)largescalefacilitiesdeliverhighfluenceultrafastsoft and hardX-raypulsesabletocreateandprobewarmdensematter(WDM).Properdiagnosticforbasic physicalquantities,liketemperatureanddensity,isnecessary,buttheshortlifetimeoftheWDMstate (few ps)makestheirmeasurementsachallengingtask.Inthisworkweproposeamethodtoestimate the WDMtemperatureusingtheexperimentalinformationfromaslowtemperaturepyrometricprobe exploitingthepropertiesoftheheatdiffusionequation.Numericalsimulationsshowthatfortypical thin foilsamples,atemperaturemeasurementwith1210 ms temporalresolutionatthedistanceof about3002500 mm fromthebeamcentercontainssufficientinformationtoretrievetheinitialspatial temperaturedistributionwithsufficientaccuracyprovidinginformationonthetemperaturereachedin the WDMregime.TheinversionoftheexperimentalinformationisobtainedbymeansofaBayesian approachexploitingaMetropolisMonteCarlonumericalprocedure.Themodelandcalculations presentedinthisworkprovidethetheoreticalbackgroundforthedevelopmentofadevicefor temperaturediagnosticsoftheTIMEXend-stationattheFermi@ElettraFELfacility.
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Dates et versions

hal-00560126 , version 1 (27-01-2011)

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  • HAL Id : hal-00560126 , version 1

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Emiliano Principi, Carino Ferrante, Adriano Filipponi, Filippo Bencivengo, Francesco d'Amico, et al.. A methodforestimatingthetemperatureinhighenergydensityfreeelectron laser experiments. Nuclear Instruments and Methods in Physics Research, 2010, 621, pp.643-649. ⟨hal-00560126⟩
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