Design of inertial fusion implosions reaching the burning plasma regime

被引：157

作者：

Kritcher, A. L. ^{[1
]}

Young, C., V ^{[1
]}

Robey, H. F. ^{[2
]}

Weber, C. R. ^{[1
]}

Zylstra, A. B. ^{[1
]}

Hurricane, O. A. ^{[1
]}

Callahan, D. A. ^{[1
]}

Ralph, J. E. ^{[1
]}

Ross, J. S. ^{[1
]}

Baker, K. L. ^{[1
]}

Casey, D. T. ^{[1
]}

Clark, D. S. ^{[1
]}

Doppner, T. ^{[1
]}

Divol, L. ^{[1
]}

Hohenberger, M. ^{[1
]}

Hopkins, L. Berzak ^{[1
]}

Le Pape, S. ^{[3
]}

Meezan, N. B. ^{[1
]}

Pak, A. ^{[1
]}

Patel, P. K. ^{[1
]}

Tommasini, R. ^{[1
]}

Ali, S. J. ^{[1
]}

Amendt, P. A. ^{[1
]}

Atherton, L. J. ^{[1
]}

Bachmann, B. ^{[1
]}

Bailey, D. ^{[1
]}

Benedetti, L. R. ^{[1
]}

Betti, R. ^{[4
]}

Bhandarkar, S. D. ^{[1
]}

Biener, J. ^{[1
]}

Bionta, R. M. ^{[1
]}

Birge, N. W. ^{[2
]}

Bond, E. J. ^{[1
]}

Bradley, D. K. ^{[1
]}

Braun, T. ^{[1
]}

Briggs, T. M. ^{[1
]}

Bruhn, M. W. ^{[1
]}

Celliers, P. M. ^{[1
]}

Chang, B. ^{[1
]}

Chapman, T. ^{[1
]}

Chen, H. ^{[1
]}

Choate, C. ^{[1
]}

Christopherson, A. R. ^{[1
]}

Crippen, J. W. ^{[5
]}

Dewald, E. L. ^{[1
]}

Dittrich, T. R. ^{[1
]}

Edwards, M. J. ^{[1
]}

Farmer, W. A. ^{[1
]}

Field, J. E. ^{[1
]}

Fittinghoff, D. ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[2] Los Alamos Natl Lab, Los Alamos, NM USA

[3] Ecole Polytech, Lab Utilisat Lasers Intenses, Palaiseau, France

[4] Univ Rochester, Laser Energet Lab, Rochester, NY USA

[5] Gen Atom Co, San Diego, CA USA

[6] MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[7] SLAC Natl Accelerator Lab, Menlo Pk, CA USA

[8] Aldermaston, Atom Weap Estab, Aldermaston, England

[9] Diamond Mat Gmbh, Freiburg, Germany

来源：

NATURE PHYSICS | 2022年 / 18卷 / 03期

关键词：

SIMULATIONS; HYDRA;

D O I：

10.1038/s41567-021-01485-9

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In a burning plasma state(1-7), alpha particles from deuterium-tritium fusion reactions redeposit their energy and are the dominant source of heating. This state has recently been achieved at the US National Ignition Facility(0) using indirect-drive inertial-confinement fusion. Our experiments use a laser-generated radiation-filled cavity (a hohlraum) to spherically implode capsules containing deuterium and tritium fuel in a central hot spot where the fusion reactions occur. We have developed more efficient hohlraums to implode larger fusion targets compared with previous experiments(9,10). This delivered more energy to the hot spot, whereas other parameters were optimized to maintain the high pressures required for inertial-confinement fusion. We also report improvements in implosion symmetry control by moving energy between the laser beams(11-16) and designing advanced hohlraum geometry(17) that allows for these larger implosions to be driven at the present laser energy and power capability of the National Ignition Facility. These design changes resulted in fusion powers of 1.5 petawatts, greater than the input power of the laser, and 170 kJ of fusion energy(18,19). Radiation hydrodynamics simulations(20,21) show energy deposition by alpha particles as the dominant term in the hot-spot energy balance, indicative of a burning plasma state.

引用

页码：251 / +

页数：18

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