Open AccessThe role of hot spot mix in the low-foot and high-foot implosions on the NIF
Author(s) -
T. Ma,
P. K. Patel,
N. Izumi,
P. T. Springer,
M. H. Key,
L. J. Atherton,
M. A. Barrios,
L. R. Benedetti,
R. M. Bionta,
E. Bond,
D. K. Bradley,
J. A. Caggiano,
D. A. Callahan,
D. T. Casey,
P. M. Celliers,
C. Cerjan,
J. A. Church,
D. S. Clark,
E. L. Dewald,
Thomas Dittrich,
S. N. Dixit,
T. Döppner,
Rebecca DyllaSpears,
D. H. Edgell,
R. Epstein,
J. E. Field,
D. N. Fittinghoff,
J. A. Frenje,
M. Gatu Johnson,
S. Glenn,
S. H. Glenzer,
G. P. Grim,
N. Guler,
S. W. Haan,
B. A. Hammel,
R. Hatarik,
H. W. Herrmann,
D. G. Hicks,
D. E. Hinkel,
L. Berzak Hopkins,
W. W. Hsing,
O. A. Hurricane,
O. S. Jones,
R. L. Kauffman,
S. F. Khan,
J. D. Kilkenny,
J. L. Kline,
B. Kozioziemski,
A. L. Kritcher,
G. A. Kyrala,
O. L. Landen,
J. D. Lindl,
S. Le Pape,
B. J. MacGowan,
A. J. Mackin,
A. G. MacPhee,
N. B. Meezan,
F. E. Merrill,
J. D. Moody,
E. I. Moses,
S. R. Nagel,
A. Nikroo,
A. Pak,
T. Parham,
H.S. Park,
J. E. Ralph,
S. P. Regan,
B. A. Remington,
H. F. Robey,
M. D. Rosen,
J. R. Rygg,
Jeffrey S. Ross,
J. D. Salmonson,
J. Sater,
D. B. Sayre,
M. B. Schneider,
D. A. Shaughnessy,
H. Sio,
B. K. Spears,
V. A. Smalyuk,
L. J. Suter,
R. Tommasini,
R. P. J. Town,
P. L. Volegov,
A. Wan,
S. V. Weber,
K. Widmann,
C. H. Wilde,
C. B. Yeamans,
M. J. Edwards
Publication year - 2017
Publication title -
physics of plasmas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.75
H-Index - 160
eISSN - 1089-7674
pISSN - 1070-664X
DOI - 10.1063/1.4983625
Subject(s) - physics , inertial confinement fusion , foot (prosody) , yield (engineering) , hot spot (computer programming) , neutron , radiation , nuclear physics , nuclear engineering , plasma , philosophy , linguistics , computer science , engineering , thermodynamics , operating system
Hydrodynamic mix of the ablator into the DT fuel layer and hot spot can be a critical performance limitation in inertial confinement fusion implosions. This mix results in increased radiation loss, cooling of the hot spot, and reduced neutron yield. To quantify the level of mix, we have developed a simple model that infers the level of contamination using the ratio of the measured x-ray emission to the neutron yield. The principal source for the performance limitation of the “low-foot” class of implosions appears to have been mix. Lower convergence “high-foot” implosions are found to be less susceptible to mix, allowing velocities of >380 km/s to be achieved.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom