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Laser ion source for heavy ion inertial fusion

Matter and Radiation at Extremes 2018年第2期3卷 61-66页

作者： Masahiro Okamura Collider-Accelerator Department Brookhaven National LaboratoryBuilding 930UptonNY 11973USA

The proposed heavy ion inertial fusion(HIF)scenarios require ampere class low charge state ion beams of heavy species.The laser ion source(LIS)is recognized as one of the promising candidates of ion beam providers,since it can deliver high brightness heavy ion beams to accelerators.The design of LIS for the HIF depends on the accelerator structure and accelerator complex following the source.In this article,we discuss the specifications and design of an appropriate LIS assuming two major types of the accelerators:radio frequency(RF)high quality factor cavity type and non-resonant induction core type.We believe that a properly designed LIS would satisfy the requirements of both types,while some issues need to be verified experimentally.

关键词： inertial fusion Accelerator Ion source Laser ablation Heavy ion source

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Ignition Conditions for Simulated Fuel Pellets in Degenerate Plasma

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Plasma Science and Technology 2013年第4期15卷 323-328页

作者： M. MAHDAVI A. GHOLAMI Physics Department Mazandaran University

A high-density, low-temperature plasma can be obtained during the compression phase in inertial confinement fusion. When high density and low temperature are reached in the plasma in the fast ignition approach, the plasma electrons can be degenerate. The electronic stopping of a slow ion is smaller than that given by the classical formula, because some transitions between the electron states are forbidden. In this case, bremsstrahlung emission is strongly sup- pressed and the ignition temperature becomes lower than that in classical plasma. The equations that predict the behavior of these plasmas are different from the classical ones, and this is the main factor in the process of decreasing the ignition temperature of the plasma. In this work, physical conditions of ignition are studied by calculating the effect of radiation loss on the ignition temperature for a simulated fuel pellet, （D/Tx/3Hey）, in degenerate plasma. In fast ignition, the energy needed for obtaining high densities is minimized and the gain can be increased considerably.

关键词： inertial fusion degenerate plasma ignition temperature bremsstrahlungemission

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An evaluation of sustainability and societal impact of high-power laser and fusion technologies:a case for a new European research infrastructure

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High Power Laser Science and Engineering 2021年第4期9卷 66-69页

作者： S.Atzeni D.Batani C.N.Danson L.A.Gizzi M.Perlado M.Tatarakis V.Tikhonchuk L.Volpe Dipartimento SBAI Universitàdi Roma"La Sapienza"Roma 00161Italy CELIA Universitéde Bordeaux-CNRS-CEAUMR 510733405 TalenceFrance AWE AldermastonReading RG74PRUK Centre for Intertial fusion Studies Blackett LaboratoryImperial College LondonLondon SW72AZUK Istituto Nazionale di Ottica Consiglio Nazionale delle Ricerche56125 PisaItaly Instituto Fusión Nuclear"Guillermo Velarde"Universidad Politecnica 28006 MadridSpain Institute of Plasma Physics and Lasers Hellenic Mediterranean University Research Centre74100 RethymnoGreece Department of Electronic Engineering Hellenic Mediterranean University73133 ChcmiaGreece ELI-Beamlines Center Institute of PhysicsCzech Academy of Sciences25241 Dolni BrezanyCzech Republic Centro de Laseres Pulsados(CLPU) Parque CientificoE-37185 VillamayorSalamancaSpain Laser-Plasma Chair at the University of Salamanca E-37185 VillamayorSalamancaSpain

fusion energy research is delivering impressive new results emerging from different infrastructures and industrial devices evolving rapidly from ideas to proof-of-principle demonstration and aiming at the conceptual design of reactors for the production of electricity.A major milestone has recently been announced in laser fusion by the Lawrence Livermore National Laboratory and is giving new thrust to laser-fusion energy research worldwide.Here we discuss how these circumstances strongly suggest the need for a European intermediate-energy facility dedicated to the physics and technology of laser-fusion ignition,the physics of fusion materials and advanced technologies for high-repetitionrate,high-average-power broadband lasers.We believe that the participation of the broader scientific community and the increased engagement of industry,in partnership with research and academic institutions,make most timely the construction of this infrastructure of extreme scientific attractiveness.

关键词： fusion energy high power lasers plasmas inertial fusion high energy density

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Laser-direct-drive program: Promise, challenge, and path forward

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Matter and Radiation at Extremes 2017年第2期2卷 37-54页

作者： E.M.Campbell V.N.Goncharov T.C.Sangster S.P.Regan P.B.Radha R.Betti J.F.Myatt D.H.Froula M.J.Rosenberg I.V.Igumenshchev W.Seka A.A.Solodov A.V.Maximov J.A.Marozas T.J.B.Collins D.Turnbull F.J.Marshall A.Shvydky J.P.Knauer R.L.McCrory A.B.Sefkow M.Hohenberger P.A.Michel T.Chapman L.Masse C.Goyon S.Ross J.W.Bates M. Karasik J.Oh J.Weaver A.J.Schmitt K.Obenschain S.P.Obenschain S.Reyes B.Van Wonterghem Laboratory for Laser Energetics University of RochesterRochesterNYUSA Lawrence Livermore National Laboratory LivermoreCAUSA Naval Research Laboratory WashingtonDCUSA

Along with laser-indirect(X-ray)-drive and magnetic-drive target concepts,laser direct drive is a viable approach to achieving ignition and gain with inertial confinement fusion.In the United States,a national program has been established to demonstrate and understand the physics of laser direct drive.The program utilizes the Omega Laser Facility to conduct implosion and coupling physics at the nominally 30-kJ scale and lasereplasma interaction and coupling physics at the MJ scale at the National Ignition Facility.This article will discuss the motivation and challenges for laser direct drive and the broad-based program presently underway in the United States.

关键词： inertial fusion Direct drive Laser interactions Hydrodynamics Omega National ignition facility

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