Direct Measurement of Ice-Ablator Interface Motion for Instability Mitigation in Indirect Drive ICF Implosions

被引：17

作者：

Do, Alexandre ^{[1
]}

Weber, Christopher R. ^{[1
]}

Dewald, Eduard L. ^{[1
]}

Casey, Daniel T. ^{[1
]}

Clark, Daniel S. ^{[1
]}

Khan, Shahab F. ^{[1
]}

Landen, Otto L. ^{[1
]}

MacPhee, Andrew G. ^{[1
]}

Smalyuk, Vladimir A. ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 2022年 / 129卷 / 21期

关键词：

INERTIAL CONFINEMENT FUSION; NATIONAL IGNITION FACILITY; LASER;

D O I：

10.1103/PhysRevLett.129.215003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In indirect drive inertial confinement fusion (ICF) implosions hydrodynamic instability growth at the imploding capsule ablator-DT fuel interface can reduce fuel compressibility and inject ablator into the hot spot hence reducing hot spot pressure and temperature. As a mitigation strategy, a gentle acceleration of this interface is predicted by simulations and theory to significantly reduce this instability growth in the early stage of the implosion. We have performed high-contrast, time-resolved x-ray refraction enhanced radiography (RER) to accurately measure the level of acceleration as a function of the initial laser drive time history for indirect-drive implosions on the National Ignition Facility. We demonstrate a transition from no acceleration to 20 +/- 1.8 mu m ns-2 acceleration by tweaking the drive that should reduce the initial instabilities by an order of magnitude at high modes.

引用

页数：6

共 40 条

[1] Direct observation of mass oscillations due to ablative Richtmyer-Meshkov instability in plastic targets [J].

Aglitskiy, Y ;

Velikovich, AL ;

Karasik, M ;

Serlin, V ;

Pawley, CJ ;

Schmitt, AJ ;

Obenschain, SP ;

Mostovych, AN ;

Gardner, JH ;

Metzler, N .

PHYSICAL REVIEW LETTERS, 2001, 87 (26) :265001-1

[2] Theory of laser-induced adiabat shaping in inertial fusion implosions: The decaying shock [J].

Anderson, K ;

Betti, R .

PHYSICS OF PLASMAS, 2003, 10 (11) :4448-4462

[3]

Atzeni S., 2004, The Physics of Inertial Fusion: BeamPlasma Interaction, Hydrodynamics, Hot Dense Matter

[4] Theory of laser-induced adiabat shaping in inertial fusion, implosions: The relaxation method [J].

Betti, R ;

Anderson, K ;

Knauer, J ;

Collins, TJB ;

McCrory, RL ;

McKenty, RW ;

Skupsky, S .

PHYSICS OF PLASMAS, 2005, 12 (04) :1-18

[5] Direct-drive laser fusion: Status and prospects [J].

Bodner, SE ;

Colombant, DG ;

Gardner, JH ;

Lehmberg, RH ;

Obenschain, SP ;

Phillips, L ;

Schmitt, AJ ;

Sethian, JD ;

McCrory, RL ;

Seka, W ;

Verdon, CP ;

Knauer, JP ;

Afeyan, BB ;

Powell, HT .

PHYSICS OF PLASMAS, 1998, 5 (05) :1901-1918

[6] Exploring implosion designs for increased compression on the National Ignition Facility using high density carbon ablators [J].

Clark, D. S. ;

Casey, D. T. ;

Weber, C. R. ;

Jones, O. S. ;

Baker, K. L. ;

Dewald, E. L. ;

Divol, L. ;

Do, A. ;

Kritcher, A. L. ;

Landen, O. L. ;

Millot, M. ;

Milovich, J. L. ;

Smalyuk, V. A. ;

Strozzi, D. J. ;

Pak, A. E. ;

Tommasini, R. ;

Edwards, M. J. .

PHYSICS OF PLASMAS, 2022, 29 (05)

[7] Three-dimensional modeling and hydrodynamic scaling of National Ignition Facility implosions [J].

Clark, D. S. ;

Weber, C. R. ;

Milovich, J. L. ;

Pak, A. E. ;

Casey, D. T. ;

Hammel, B. A. ;

Ho, D. D. ;

Jones, O. S. ;

Koning, J. M. ;

Kritcher, A. L. ;

Marinak, M. M. ;

Masse, L. P. ;

Munro, D. H. ;

Patel, M. V. ;

Patel, P. K. ;

Robey, H. F. ;

Schroeder, C. R. ;

Sepke, S. M. ;

Edwards, M. J. .

PHYSICS OF PLASMAS, 2019, 26 (05)

[8] Direct observation of density gradients in ICF capsule implosions via streaked Refraction Enhanced Radiography (RER) [J].

Dewald, E. L. ;

Landen, O. L. ;

Ho, D. ;

Hopkins, L. Berzak ;

Ping, Y. ;

Masse, L. ;

Thorn, D. ;

Kroll, J. ;

Nikroo, A. .

HIGH ENERGY DENSITY PHYSICS, 2020, 36

[9] X-ray streaked refraction enhanced radiography for inferring inflight density gradients in ICF capsule implosions [J].

Dewald, E. L. ;

Landen, O. L. ;

Masse, L. ;

Ho, D. ;

Ping, Y. ;

Thorn, D. ;

Izumi, N. ;

Hopkins, L. Berzak ;

Kroll, J. ;

Nikroo, A. ;

Koch, J. A. .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2018, 89 (10)

[10] Capsule Ablator Inflight Performance Measurements Via Streaked Radiography Of ICF Implosions On The NIF [J].

Dewald, E. L. ;

Tommasini, R. ;

Mackinnon, A. ;

MacPhee, A. ;

Meezan, N. ;

Olson, R. ;

Hicks, D. ;

LePape, S. ;

Izumi, N. ;

Fournier, K. ;

Barrios, M. A. ;

Ross, S. ;

Pak, A. ;

Doppner, T. ;

Kalantar, D. ;

Opachich, K. ;

Rygg, R. ;

Bradley, D. ;

Bell, P. ;

Hamza, A. ;

Dzenitis, B. ;

Landen, O. L. ;

MacGowan, B. ;

LaFortune, K. ;

Widmayer, C. ;

Van Wonterghem, B. ;

Kilkenny, J. ;

Edwards, M. J. ;

Atherton, J. ;

Moses, E. I. .

8TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA 2013), 2016, 688

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