Hot Spot Evolution Measured by High-Resolution X-Ray Spectroscopy at the National Ignition Facility

被引：14

作者：

Gao, Lan ^{[1
]}

Kraus, B. F. ^{[1
]}

Hill, K. W. ^{[1
]}

Schneider, M. B. ^{[2
]}

Christopherson, A. ^{[3
]}

Bachmann, B. ^{[2
]}

Bitter, M. ^{[1
]}

Efthimion, P. ^{[1
]}

Pablant, N. ^{[1
]}

Betti, R. ^{[3
]}

Thomas, C. ^{[3
]}

Thorn, D. ^{[2
]}

MacPhee, A. G. ^{[2
]}

Khan, S. ^{[2
]}

Kauffman, R. ^{[2
]}

Liedahl, D. ^{[2
]}

Chen, H. ^{[2
]}

Bradley, D. ^{[2
]}

Kilkenny, J. ^{[2
]}

Lahmann, B. ^{[4
]}

Stambulchik, E. ^{[5
]}

Maron, Y. ^{[5
]}

机构：

[1] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

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

[3] Univ Rochester, Lab Laser Energet, Rochester, NY 14623 USA

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

[5] Weizmann Inst Sci, Fac Phys, IL-7610001 Rehovot, Israel

来源：

PHYSICAL REVIEW LETTERS | 2022年 / 128卷 / 18期

关键词：

INERTIAL CONFINEMENT FUSION; DYNAMICS; PLASMA;

D O I：

10.1103/PhysRevLett.128.185002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Evolution of the hot spot plasma conditions was measured using high-resolution x-ray spectroscopy at the National Ignition Facility. The capsules were filled with DD gas with trace levels of Kr and had either a high-density-carbon (HDC) ablator or a tungsten (W)-doped HDC ablator. Time-resolved measurement of the Kr He?? spectra, absolutely calibrated by a simultaneous time-integrated measurement, allows inference of the electron density and temperature through observing Stark broadening and the relative intensities of dielectronic satellites. By matching the calculated hot spot emission using a collisional-radiative code to experimental observations, the hot spot size and areal density are determined. These advanced spectroscopy techniques further reveal the effect of W dopant in the ablator on the hot spot parameters for their improved implosion performance.

引用

页数：6

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