Study of direct-drive capsule implosions in inertial confinement fusion with proton radiography

C. K. Li, F. H. Séguin, J. A. Frenje, M. Manuel, R. D. Petrasso, V. A. Smalyuk, R. Betti, J. Delettrez, J. P. Knauer, F. Marshall, D. D. Meyerhofer, D. Shvarts, C. Stoeckl, W. Theobald, J. R. Rygg, O. L. Landen, R. P.J. Town, P. A. Amendt, C. A. Back, J. D. Kilkenny

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Implosions of spherical and cone-in-shell targets in direct-drive inertial confinement fusion (ICF) are studied with proton radiography. Time-gated, 15 MeV proton images provide a unique and comprehensive picture of ICF implosions that cover all the implosion phases from acceleration, through coasting, deceleration to stagnation. A self-generated internal radial electric field that reserves the direction during the course of implosions is observed. It is initially directed inward (at ∼109 V m-1), eventually reverses direction (∼108 V m-1) and is probably the consequence of the electron pressure gradient. Monte Carlo simulations quantitatively confirm the observations of the electric field and its evolution. The observations are compared with self-emitted x-rays and hydrodynamic simulations.

Original languageEnglish
Article number014003
JournalPlasma Physics and Controlled Fusion
Issue number1
StatePublished - 29 Jun 2009

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Condensed Matter Physics


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