Observations of Multiple Nuclear Reaction Histories and Fuel-Ion Species Dynamics in Shock-Driven Inertial Confinement Fusion Implosions

被引：20

作者：

Sio, H. ^{[1
]}

Frenje, J. A. ^{[1
]}

Le, A. ^{[2
]}

Atzeni, S. ^{[3
]}

Kwan, T. J. T. ^{[2
]}

Johnson, M. Gatu ^{[1
]}

Kagan, G. ^{[2
]}

Stoeckl, C. ^{[4
]}

Li, C. K. ^{[1
]}

Parker, C. E. ^{[1
]}

Forrest, C. J. ^{[4
]}

Glebov, V. ^{[4
]}

Kabadi, N. V. ^{[1
]}

Bose, A. ^{[1
]}

Rinderknecht, H. G. ^{[4
]}

Amendt, P. ^{[5
]}

Casey, D. T. ^{[5
]}

Mancini, R. ^{[6
]}

Taitano, W. T. ^{[2
]}

Keenan, B. ^{[2
]}

Simakov, A. N. ^{[2
]}

Chacon, L. ^{[2
]}

Regan, S. P. ^{[4
]}

Sangster, T. C. ^{[4
]}

Campbell, E. M. ^{[4
]}

Seguin, F. H. ^{[1
]}

Petrasso, R. D. ^{[1
]}

机构：

[1] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA

[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[3] Univ Roma La Sapienza, Dipartimento SBAI, Via Antonio Scarpa 14, I-00161 Rome, Italy

[4] Lab Laser Energet, Rochester, NY 14623 USA

[5] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA

[6] Univ Nevada, Phys Dept, Reno, NV 89557 USA

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 122卷 / 03期

关键词：

PHYSICS BASIS; PERFORMANCE; IGNITION; IMPLICIT; OMEGA;

D O I：

10.1103/PhysRevLett.122.035001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Fuel-ion species dynamics in hydrodynamiclike shock-driven (DTHe)-He-3-filled inertial confinement fusion implosion is quantitatively assessed for the first time using simultaneously measured (DHe)-He-3 and DT reaction histories. These reaction histories are measured with the particle x-ray temporal diagnostic, which captures the relative timing between different nuclear burns with unprecedented precision (similar to 10 ps). The observed 50 +/- 10 ps earlier (DHe)-He-3 reaction history timing (relative to DT) cannot be explained by average-ion hydrodynamic simulations and is attributed to fuel-ion species separation between the D, T, and He-3 ions during shock convergence and rebound. At the onset of the shock burn, inferred He-3/T fuel ratio in the burn region using the measured reaction histories is much higher as compared to the initial gas-filled ratio. As T and He-3 have the same mass but different charge, these results indicate that the charge-to-mass ratio plays an important role in driving fuel-ion species separation during strong shock propagation even for these hydrodynamiclike plasmas.

引用

页数：6

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