Studies of Plastic-Ablator Compressibility for Direct-Drive Inertial Confinement Fusion on Omega

2008 ◽  
Vol 100 (18) ◽  
Author(s):  
S. X. Hu ◽  
V. A. Smalyuk ◽  
V. N. Goncharov ◽  
J. P. Knauer ◽  
P. B. Radha ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Inertial Confinement ◽  
Direct Drive ◽  
Confinement Fusion

Improved performance of direct-drive inertial confinement fusion target designs with adiabat shaping using an intensity picket

2003 ◽  
Vol 10 (5) ◽  
pp. 1906-1918 ◽  
Author(s):  
V. N. Goncharov ◽  
J. P. Knauer ◽  
P. W. McKenty ◽  
P. B. Radha ◽  
T. C. Sangster ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Inertial Confinement ◽  
Direct Drive ◽  
Confinement Fusion ◽  
Fusion Target ◽  
Improved Performance ◽  
Inertial Confinement Fusion Target

scholarly journals Laser driven implosion

1990 ◽  
Vol 8 (1-2) ◽  
pp. 3-17 ◽  
Author(s):  
C. Yamanaka
Keyword(s):  
Inertial Confinement Fusion ◽  
Laser Energy ◽  
Laser Fusion ◽  
Plastic Shell ◽  
Inertial Confinement ◽  
Liquid Density ◽  
Direct Drive ◽  
Uniform Compression ◽  
Confinement Fusion ◽  
Key Issues

Inertial confinement fusion (ICF) has made great progress. In fact several significant scientific firsts have been achieved in the last year. These developments have presented the ICF community with an opportunity to embark on a new phase in ICF research. The key issues of laser fusion are to attain a high absorption of laser light in a plasma, to prevent preheating of fuel during the compression, and to achieve highly efficient implosion by uniform compression of fuel due to the homogeneous deposition of laser energy on the pellet surface. Direct drive and indirect drive have been investigated. The progress in both schemes is remarkable. The neutron yield by the stagnation free compression of the LHART target has attained 1013 which corresponds to a pellet gain of 1/500. The plastic shell target has reached a fuel density as large as 600 times the liquid density which is measured by the Si activation method as well as the D knockon method. A cryogenic foam target is now under investigation.

scholarly journals Thermodynamic properties of thermonuclear fuel in inertial confinement fusion

2016 ◽  
Vol 34 (3) ◽  
pp. 539-544 ◽  
Author(s):  
V. Brandon ◽  
B. Canaud ◽  
M. Temporal ◽  
R. Ramis
Keyword(s):  
Kinetic Energy ◽  
Inertial Confinement Fusion ◽  
Hot Spot ◽  
Inertial Confinement ◽  
Direct Drive ◽  
Aspect Ratios ◽  
Confinement Fusion ◽  
Thermonuclear Fuel ◽  
Target Family ◽  
Very High

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.

Fabrication of Hollow Silica Aerogel Spheres for Direct Drive Inertial Confinement Fusion (ICF) Experiments

2005 ◽  
Vol 901 ◽  
Author(s):  
Reny Richard Paguio ◽  
Abbas Nikroo ◽  
Jared F Hund ◽  
Christopher A. Frederick ◽  
Javier Jaquez ◽  
...  
Keyword(s):  
Wall Thickness ◽  
Silica Aerogel ◽  
Inertial Confinement Fusion ◽  
Gelation Time ◽  
High Yield ◽  
Full Density ◽  
Laser Fusion ◽  
Inertial Confinement ◽  
Direct Drive ◽  
Confinement Fusion

AbstractHollow foam spheres are needed for laser fusion experiments on the OMEGA laser facility at the University of Rochester as part of the demonstration of the feasibility of inertial confinement fusion. Previously polymer based foam and aerogel shells have been produced using resorcinol-formaldehyde (R/F) and divinylbenzene (DVB). In this paper we discuss the development of silica aerogel (SAG) shells. SAG may have the increased robustness, which is important in processing these laser targets. SAG shells were fabricated by the microencapsulation method using a triple orifice droplet generator. This technique allows for precise control of the shell diameter and wall thickness. Reduction of the aerogel gelation time is crucial to fabrication of intact shells with high yield. In addition, the proper choice of the components of the different phases of the microencapsulation process is essential for fabrication of intact SAG shells with proper sphericity and wall uniformity. The density of shells fabricated is approximately 100 mg/cc and the diameter ranges from 700–2000 μm, with a wall thickness of 50–200 μm. Development of a full density permeation barrier for retention of the fusion fuel will also be discussed.

scholarly journals OMEGA Upgrade laser for direct-drive target experiments

1993 ◽  
Vol 11 (2) ◽  
pp. 317-321 ◽  
Author(s):  
J.M. Soures ◽  
R.L. McCrory ◽  
T.R. Boehly ◽  
R.S. Craxton ◽  
S.D. Jacobs ◽  
...  
Keyword(s):  
Pulse Shape ◽  
Inertial Confinement Fusion ◽  
Pulse Shaping ◽  
Laser System ◽  
Beam Power ◽  
Power Balance ◽  
Inertial Confinement ◽  
Design Rationale ◽  
Direct Drive ◽  
Confinement Fusion

Validation of the direct-drive approach to inertial confinement fusion requires the development of a 351-nm wavelength, 30-kJ, 50-TW laser system with flexible pulse shaping and irradiation uniformity approaching 1%. An upgrade of the existing OMEGA direct-drive facility at Rochester is planned to meet these objectives. In this article, we review the design rationale and specifications of the OMEGA Upgrade laser with particular emphasis on techniques planned to achieve the required degree of beam smoothing, temporal pulse shape, and beam-to-beam power balance.

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