Hydrodynamic instabilities seeded by the X-ray shadow of ICF capsule fill-tubes

A. G. Macphee; V. A. Smalyuk; O. L. Landen; C. R. Weber; H. F. Robey; E. L. Alfonso; K. L. Baker; L. F. Berzak Hopkins; J. Biener; T. Bunn; D. T. Casey; D. S. Clark; J. W. Crippen; L. Divol; M. Farrell; S. Felker; J. E. Field; W. W. Hsing; C. Kong; S. Le Pape; D. A. Martinez; P. Michel; J. Milovich; A. Moore; A. Nikroo; L. Pickworth; N. Rice; M. Stadermann; C. Yeamans; C. Wild

doi:10.1063/1.5037816

Hydrodynamic instabilities seeded by the X-ray shadow of ICF capsule fill-tubes

A. G. Macphee
, V. A. Smalyuk
, O. L. Landen
, C. R. Weber
, H. F. Robey
, E. L. Alfonso
, K. L. Baker
, L. F. Berzak Hopkins
, J. Biener
, T. Bunn
, D. T. Casey
, D. S. Clark
, J. W. Crippen
, L. Divol
, M. Farrell
, S. Felker
, J. E. Field
, W. W. Hsing
, C. Kong
, S. Le Pape

D. A. Martinez, P. Michel, J. Milovich, A. Moore, A. Nikroo, L. Pickworth, N. Rice, M. Stadermann, C. Yeamans, C. Wild

Lawrence Livermore National Laboratory
General Atomics
Diamond Materials GmbH

Research output: Contribution to journal › Article › peer-review

Abstract

During the first few hundred picoseconds of indirect drive for inertial confinement fusion on the National Ignition Facility, x-ray spots formed on the hohlraum wall when the drive beams cast shadows of the fuel fill-tube on the capsule surface. Differential ablation at the shadow boundaries seeds perturbations which are hydrodynamically unstable under subsequent acceleration and can grow to impact capsule performance. We have characterized this shadow imprint mechanism and demonstrated two techniques to mitigate against it using (i) a reduced diameter fuel fill-tube, and (ii) a pre-pulse to blow down the fill-tube before the shadow forming x-ray spots from the main outer drive beams develop.

Original language	English
Article number	082702
Journal	Physics of Plasmas
Volume	25
Issue number	8
DOIs	https://doi.org/10.1063/1.5037816
Publication status	Published - 1 Aug 2018
Externally published	Yes

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Macphee, A. G., Smalyuk, V. A., Landen, O. L., Weber, C. R., Robey, H. F., Alfonso, E. L., Baker, K. L., Berzak Hopkins, L. F., Biener, J., Bunn, T., Casey, D. T., Clark, D. S., Crippen, J. W., Divol, L., Farrell, M., Felker, S., Field, J. E., Hsing, W. W., Kong, C., ... Wild, C. (2018). Hydrodynamic instabilities seeded by the X-ray shadow of ICF capsule fill-tubes. Physics of Plasmas, 25(8), Article 082702. https://doi.org/10.1063/1.5037816

@article{f3b90aa9098c4689bf0f75b9bd4b6204,

title = "Hydrodynamic instabilities seeded by the X-ray shadow of ICF capsule fill-tubes",

abstract = "During the first few hundred picoseconds of indirect drive for inertial confinement fusion on the National Ignition Facility, x-ray spots formed on the hohlraum wall when the drive beams cast shadows of the fuel fill-tube on the capsule surface. Differential ablation at the shadow boundaries seeds perturbations which are hydrodynamically unstable under subsequent acceleration and can grow to impact capsule performance. We have characterized this shadow imprint mechanism and demonstrated two techniques to mitigate against it using (i) a reduced diameter fuel fill-tube, and (ii) a pre-pulse to blow down the fill-tube before the shadow forming x-ray spots from the main outer drive beams develop.",

author = "Macphee, \{A. G.\} and Smalyuk, \{V. A.\} and Landen, \{O. L.\} and Weber, \{C. R.\} and Robey, \{H. F.\} and Alfonso, \{E. L.\} and Baker, \{K. L.\} and \{Berzak Hopkins\}, \{L. F.\} and J. Biener and T. Bunn and Casey, \{D. T.\} and Clark, \{D. S.\} and Crippen, \{J. W.\} and L. Divol and M. Farrell and S. Felker and Field, \{J. E.\} and Hsing, \{W. W.\} and C. Kong and \{Le Pape\}, S. and Martinez, \{D. A.\} and P. Michel and J. Milovich and A. Moore and A. Nikroo and L. Pickworth and N. Rice and M. Stadermann and C. Yeamans and C. Wild",

note = "Publisher Copyright: {\textcopyright} 2018 Author(s).",

year = "2018",

month = aug,

day = "1",

doi = "10.1063/1.5037816",

language = "English",

volume = "25",

journal = "Physics of Plasmas",

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Macphee, AG, Smalyuk, VA, Landen, OL, Weber, CR, Robey, HF, Alfonso, EL, Baker, KL, Berzak Hopkins, LF, Biener, J, Bunn, T, Casey, DT, Clark, DS, Crippen, JW, Divol, L, Farrell, M, Felker, S, Field, JE, Hsing, WW, Kong, C, Le Pape, S, Martinez, DA, Michel, P, Milovich, J, Moore, A, Nikroo, A, Pickworth, L, Rice, N, Stadermann, M, Yeamans, C & Wild, C 2018, 'Hydrodynamic instabilities seeded by the X-ray shadow of ICF capsule fill-tubes', Physics of Plasmas, vol. 25, no. 8, 082702. https://doi.org/10.1063/1.5037816

TY - JOUR

T1 - Hydrodynamic instabilities seeded by the X-ray shadow of ICF capsule fill-tubes

AU - Macphee, A. G.

AU - Smalyuk, V. A.

AU - Landen, O. L.

AU - Weber, C. R.

AU - Robey, H. F.

AU - Alfonso, E. L.

AU - Baker, K. L.

AU - Berzak Hopkins, L. F.

AU - Biener, J.

AU - Bunn, T.

AU - Casey, D. T.

AU - Clark, D. S.

AU - Crippen, J. W.

AU - Divol, L.

AU - Farrell, M.

AU - Felker, S.

AU - Field, J. E.

AU - Hsing, W. W.

AU - Kong, C.

AU - Le Pape, S.

AU - Martinez, D. A.

AU - Michel, P.

AU - Milovich, J.

AU - Moore, A.

AU - Nikroo, A.

AU - Pickworth, L.

AU - Rice, N.

AU - Stadermann, M.

AU - Yeamans, C.

AU - Wild, C.

PY - 2018/8/1

Y1 - 2018/8/1

N2 - During the first few hundred picoseconds of indirect drive for inertial confinement fusion on the National Ignition Facility, x-ray spots formed on the hohlraum wall when the drive beams cast shadows of the fuel fill-tube on the capsule surface. Differential ablation at the shadow boundaries seeds perturbations which are hydrodynamically unstable under subsequent acceleration and can grow to impact capsule performance. We have characterized this shadow imprint mechanism and demonstrated two techniques to mitigate against it using (i) a reduced diameter fuel fill-tube, and (ii) a pre-pulse to blow down the fill-tube before the shadow forming x-ray spots from the main outer drive beams develop.

AB - During the first few hundred picoseconds of indirect drive for inertial confinement fusion on the National Ignition Facility, x-ray spots formed on the hohlraum wall when the drive beams cast shadows of the fuel fill-tube on the capsule surface. Differential ablation at the shadow boundaries seeds perturbations which are hydrodynamically unstable under subsequent acceleration and can grow to impact capsule performance. We have characterized this shadow imprint mechanism and demonstrated two techniques to mitigate against it using (i) a reduced diameter fuel fill-tube, and (ii) a pre-pulse to blow down the fill-tube before the shadow forming x-ray spots from the main outer drive beams develop.

UR - https://www.scopus.com/pages/publications/85051124283

U2 - 10.1063/1.5037816

DO - 10.1063/1.5037816

M3 - Article

AN - SCOPUS:85051124283

SN - 1070-664X

VL - 25

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 8

M1 - 082702

ER -

Hydrodynamic instabilities seeded by the X-ray shadow of ICF capsule fill-tubes

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