The recent achievement of fusion ignition with laser-driven technologies at the National Ignition Facility sets a historic accomplishment in fusion energy research.This accomplishment paves the way for using laser ine...The recent achievement of fusion ignition with laser-driven technologies at the National Ignition Facility sets a historic accomplishment in fusion energy research.This accomplishment paves the way for using laser inertial fusion as a viable approach for future energy production.Europe has a unique opportunity to empower research in this field internationally,and the scientific community is eager to engage in this journey.We propose establishing a European programme on inertial-fusion energy with the mission to demonstrate laser-driven ignition in the direct-drive scheme and to develop pathway technologies for the commercial fusion reactor.The proposed roadmap is based on four complementary axes:(ⅰ)the physics of laser-plasma interaction and burning plasmas;(ⅱ)high-energy high repetition rate laser technology;(ⅲ)fusion reactor technology and materials;and(ⅳ)reinforcement of the laser fusion community by international education and training programmes.We foresee collaboration with universities,research centres and industry and establishing joint activities with the private sector involved in laser fusion.This project aims to stimulate a broad range of high-profile industrial developments in laser,plasma and radiation technologies along with the expected high-level socio-economic impact.展开更多
This paper provides an up-to-date review of the problems related to the generation,detection and mitigation of strong electromagnetic pulses created in the interaction of high-power,high-energy laser pulses with diffe...This paper provides an up-to-date review of the problems related to the generation,detection and mitigation of strong electromagnetic pulses created in the interaction of high-power,high-energy laser pulses with different types of solid targets.It includes new experimental data obtained independently at several international laboratories.The mechanisms of electromagnetic field generation are analyzed and considered as a function of the intensity and the spectral range of emissions they produce.The major emphasis is put on the GHz frequency domain,which is the most damaging for electronics and may have important applications.The physics of electromagnetic emissions in other spectral domains,in particular THz and MHz,is also discussed.The theoretical models and numerical simulations are compared with the results of experimental measurements,with special attention to the methodology of measurements and complementary diagnostics.Understanding the underlying physical processes is the basis for developing techniques to mitigate the electromagnetic threat and to harness electromagnetic emissions,which may have promising applications.展开更多
The interaction of ultra-intense high-power lasers with solid-state targets has been largely studied for the past 20 years as a future compact proton and ion source.Indeed,the huge potential established on the target ...The interaction of ultra-intense high-power lasers with solid-state targets has been largely studied for the past 20 years as a future compact proton and ion source.Indeed,the huge potential established on the target surface by the escaping electrons provides accelerating gradients of TV/m.This process,called target normal sheath acceleration,involves a large number of phenomena and is very difficult to study because of the picosecond scale dynamics.At the SPARC LAB Test Facility,the high-power laser FLAME is employed in experiments with solid targets,aiming to study possible correlations between ballistic fast electrons and accelerated protons.In detail,we have installed in the interaction chamber two different diagnostics,each one devoted to characterizing one beam.The first relies on electro-optic sampling,and it has been adopted to completely characterize the ultrafast electron components.On the other hand,a time-of-flight detector,based on chemical-vapour-deposited diamond,has allowed us to retrieve the proton energy spectrum.In this work,we report preliminary studies about simultaneous temporal resolved measurements of both the first forerunner escaping electrons and the accelerated protons for different laser parameters.展开更多
文摘The recent achievement of fusion ignition with laser-driven technologies at the National Ignition Facility sets a historic accomplishment in fusion energy research.This accomplishment paves the way for using laser inertial fusion as a viable approach for future energy production.Europe has a unique opportunity to empower research in this field internationally,and the scientific community is eager to engage in this journey.We propose establishing a European programme on inertial-fusion energy with the mission to demonstrate laser-driven ignition in the direct-drive scheme and to develop pathway technologies for the commercial fusion reactor.The proposed roadmap is based on four complementary axes:(ⅰ)the physics of laser-plasma interaction and burning plasmas;(ⅱ)high-energy high repetition rate laser technology;(ⅲ)fusion reactor technology and materials;and(ⅳ)reinforcement of the laser fusion community by international education and training programmes.We foresee collaboration with universities,research centres and industry and establishing joint activities with the private sector involved in laser fusion.This project aims to stimulate a broad range of high-profile industrial developments in laser,plasma and radiation technologies along with the expected high-level socio-economic impact.
基金the framework of the EUROfusion Consortium and funded from the Euratom research and training programme 2014–2018 and 2019– 2020 under grant agreement No. 633053the ELI Beamlines Projects LQ1606 and 19-02545S with financial support from the Czech Science Foundation and the Ministry of Education, Youth and Sports of the Czech Republic+6 种基金support from the European Regional Development Fund, the project ELITAS CZ.02.1.01/0.0/0.0/16 013/0001793the National Programme of ‘Sustainability Ⅱ’ and ELI phase 2 CZ.02.1.01/0.0/0.0/15008/0000162The PETAL project was designed and built by the CEA under the financial auspices of the Region Nouvelle Aquitaine, the French Government and the European Unionsupported by EPSRC grants EP/K022415/1 and EP/R006202supported by the European Cluster of Advanced Laser Light Sources, EUCALL, which has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 654220funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 654148 Laserlab-Europethe use of the EPOCH PIC code (developed under EPSRC grant EP/G054940/1).
文摘This paper provides an up-to-date review of the problems related to the generation,detection and mitigation of strong electromagnetic pulses created in the interaction of high-power,high-energy laser pulses with different types of solid targets.It includes new experimental data obtained independently at several international laboratories.The mechanisms of electromagnetic field generation are analyzed and considered as a function of the intensity and the spectral range of emissions they produce.The major emphasis is put on the GHz frequency domain,which is the most damaging for electronics and may have important applications.The physics of electromagnetic emissions in other spectral domains,in particular THz and MHz,is also discussed.The theoretical models and numerical simulations are compared with the results of experimental measurements,with special attention to the methodology of measurements and complementary diagnostics.Understanding the underlying physical processes is the basis for developing techniques to mitigate the electromagnetic threat and to harness electromagnetic emissions,which may have promising applications.
文摘The interaction of ultra-intense high-power lasers with solid-state targets has been largely studied for the past 20 years as a future compact proton and ion source.Indeed,the huge potential established on the target surface by the escaping electrons provides accelerating gradients of TV/m.This process,called target normal sheath acceleration,involves a large number of phenomena and is very difficult to study because of the picosecond scale dynamics.At the SPARC LAB Test Facility,the high-power laser FLAME is employed in experiments with solid targets,aiming to study possible correlations between ballistic fast electrons and accelerated protons.In detail,we have installed in the interaction chamber two different diagnostics,each one devoted to characterizing one beam.The first relies on electro-optic sampling,and it has been adopted to completely characterize the ultrafast electron components.On the other hand,a time-of-flight detector,based on chemical-vapour-deposited diamond,has allowed us to retrieve the proton energy spectrum.In this work,we report preliminary studies about simultaneous temporal resolved measurements of both the first forerunner escaping electrons and the accelerated protons for different laser parameters.