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Characteristics of Bremsstrahlung x-ray sources created by picosecond laser pulses and radioprotection issues for petawatt lasers

hal.structure.identifierDAM Île-de-France [DAM/DIF]
dc.contributor.authorCOMPANT LA FONTAINE, A.
hal.structure.identifierDAM Île-de-France [DAM/DIF]
dc.contributor.authorCOURTOIS, Christian
hal.structure.identifierDAM Île-de-France [DAM/DIF]
dc.contributor.authorLANDOAS, O.
hal.structure.identifierDAM Île-de-France [DAM/DIF]
dc.contributor.authorLIDOVE, G.
hal.structure.identifierDAM Île-de-France [DAM/DIF]
dc.contributor.authorMÉOT, V.
hal.structure.identifierDAM Île-de-France [DAM/DIF]
dc.contributor.authorMOREL, Pierre
hal.structure.identifierDAM Île-de-France [DAM/DIF]
dc.contributor.authorNUTER, R.
hal.structure.identifierDAM Île-de-France [DAM/DIF]
dc.contributor.authorLEFEBVRE, E.
hal.structure.identifierCentre d'études scientifiques et techniques d'Aquitaine [CESTA]
dc.contributor.authorBOSCHERON, A.
hal.structure.identifierCentre d'études scientifiques et techniques d'Aquitaine [CESTA]
dc.contributor.authorGRENIER, J.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorALÉONARD, M.M.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorCLAVERIE, G.
dc.contributor.authorGERBAUX, M.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorGOBET, F.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorHANNACHI, F.
dc.contributor.authorMALKA, G.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorSCHEURER, J.N.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorTARISIEN, M.
dc.date.issued2008
dc.date.conference2008-08-31
dc.description.abstractEnPrevious experimental and numerical results have shown that in multi-MeV Bremsstrahlung x-ray sources created by picosecond laser pulses, the delivered on-axis dose increases if the laser interacts with under-critical plasmas. The effect of the laser-plasma interaction as a function of the plasma density gradient is thus first studied here, by focusing the short pulse of the Alisé laser on a solid tantalum target coated with plastic. Interaction conditions are modified by irradiating the target front side with a secondary nanosecond heating beam, prior to the main pulse. The length of the expanding plasma is modified by adjusting the delay between the interaction and heating beams. Various diagnostics give access to a whole set of consistent experimental results on the x-ray source properties which are compared successfully to self-consistent numerical simulations obtained with coupled PIC and Monte Carlo codes. All source parameters increase as the plasma length increases, in reason of the increasing number of high-energy electrons near the axis. In a second part of this talk, we use our simulation tools to predict the x-ray and neutron (produced by photonuclear interactions in the target) flash characteristics that can be expected on future PW lasers. Favourable scaling laws for the production of an intense, directional and short duration x-ray source versus intensity are observed. However, these findings also stress that radioprotection will become an important issue for future petawatt lasers operating at the kJ level.
dc.language.isoen
dc.source.titleHigh Energy Density Physics with Intense Ion and Laser Beams
dc.title.enCharacteristics of Bremsstrahlung x-ray sources created by picosecond laser pulses and radioprotection issues for petawatt lasers
dc.typeCommunication dans un congrès
dc.subject.halPhysique [physics]/Physique Nucléaire Expérimentale [nucl-ex]
bordeaux.countryDE
bordeaux.title.proceedingHigh Energy Density Physics with Intense Ion and Laser Beams
bordeaux.conference.cityDarmstadt
bordeaux.peerReviewedoui
hal.identifierin2p3-00399863
hal.version1
hal.invitednon
hal.proceedingsoui
hal.conference.end2008-09-05
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//in2p3-00399863v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=High%20Energy%20Density%20Physics%20with%20Intense%20Ion%20and%20Laser%20Beams&rft.date=2008&rft.au=COMPANT%20LA%20FONTAINE,%20A.&COURTOIS,%20Christian&LANDOAS,%20O.&LIDOVE,%20G.&M%C3%89OT,%20V.&rft.genre=unknown


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