scholarly journals Density determination of the thermonuclear fuel region in inertial confinement fusion implosions

2020 ◽  
Vol 127 (8) ◽  
pp. 083301 ◽  
Author(s):  
P. L. Volegov ◽  
S. H. Batha ◽  
V. Geppert-Kleinrath ◽  
C. R. Danly ◽  
F. E. Merrill ◽  
...  
2012 ◽  
Vol 85 (6) ◽  
Author(s):  
Y. Kim ◽  
J. M. Mack ◽  
H. W. Herrmann ◽  
C. S. Young ◽  
G. M. Hale ◽  
...  

X-ray spectroscopy provides a variety of means for studying the interaction of lasers with plasmas, in particular the interaction with imploding targets in inertial confinement fusion. A typical fusion target is composed of materials other than the thermonuclear fuel which play a variety of roles (tamping, shielding, thermal isolation, etc.). These structural elements emit characteristic X-ray lines and continua, and through their spectral and spatial distributions can yield very valuable information on the interaction and implosion dynamics. Examples are the study of heat conductivity, the mixing of different target layers, and the determination of temperature and density at the compressed target core. Results will be shown for electron densities N e = 10 24 cm -3 and temperatures T = 1 keV measured during compression of argon-filled targets with a six-beam laser of peak power 2 TW.


2019 ◽  
Vol 26 (6) ◽  
pp. 062702 ◽  
Author(s):  
T. R. Joshi ◽  
S. C. Hsu ◽  
P. Hakel ◽  
N. M. Hoffman ◽  
H. Sio ◽  
...  

2016 ◽  
Vol 34 (3) ◽  
pp. 539-544 ◽  
Author(s):  
V. Brandon ◽  
B. Canaud ◽  
M. Temporal ◽  
R. Ramis

AbstractHot-spot path in the thermodynamic space $({\rm \rho} R,T_{\rm i} )_{{\rm hs}} $ is investigated for direct-drive scaled-target family covering a huge interval of kinetic energy on both sides of kinetic threshold for ignition. Different peak implosion velocities and two initial aspect ratios have been considered. It is shown that hot spot follows almost the same path during deceleration up to stagnation whatever the target is. As attended, after stagnation, a clear distinction is done between non-, marginally-, or fully igniting targets. For the last, ionic temperature can reach very high values when the thermonuclear energy becomes very high.


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