Abstract
Time-gated, monoenergetic radiography with 15-MeV protons provides unique measurements of implosion dynamics in direct-drive inertial-confinement fusion. Images obtained during acceleration, coasting, deceleration, and stagnation display a comprehensive picture of spherical implosions. Critical information inferred from such images, hitherto unavailable, characterizes the spatial structure and temporal evolution of self-generated fields and plasma areal density. Results include the first observation of a radial electric field inside the imploding capsule. It is initially directed inward (at ∼109V/m), eventually reverses direction (∼108V/m), and is the probable consequence of the evolution of the electron pressure gradient.
Original language | English |
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Article number | 225001 |
Journal | Physical Review Letters |
Volume | 100 |
Issue number | 22 |
DOIs | |
State | Published - 2 Jun 2008 |
ASJC Scopus subject areas
- Physics and Astronomy (all)