scholarly journals Laser beam propagation through inertial confinement fusion hohlraum plasmas

2007 ◽  
Vol 14 (5) ◽  
pp. 055705 ◽  
Author(s):  
D. H. Froula ◽  
L. Divol ◽  
N. B. Meezan ◽  
S. Dixit ◽  
P. Neumayer ◽  
...  
Keyword(s):  
Laser Beam ◽  
Inertial Confinement Fusion ◽  
Beam Propagation ◽  
Inertial Confinement ◽  
Laser Beam Propagation ◽  
Confinement Fusion

Role of laser beam geometry in improving implosion symmetry and performance for indirect-drive inertial confinement fusion

2003 ◽  
Vol 10 (6) ◽  
pp. 2429-2432 ◽  
Author(s):  
R. E. Turner ◽  
P. A. Amendt ◽  
O. L. Landen ◽  
L. J. Suter ◽  
R. J. Wallace ◽  
...  
Keyword(s):  
Laser Beam ◽  
Inertial Confinement Fusion ◽  
Inertial Confinement ◽  
Beam Geometry ◽  
Confinement Fusion ◽  
Indirect Drive ◽  
And Performance

scholarly journals Laser amplification by electric pulse power

2006 ◽  
Vol 24 (4) ◽  
pp. 525-533 ◽  
Author(s):  
F. WINTERBERG
Keyword(s):  
Laser Beam ◽  
Inertial Confinement Fusion ◽  
Electric Pulse ◽  
Fast Ignition ◽  
Pulse Power ◽  
Inertial Confinement ◽  
Pinch Effect ◽  
Laser Amplification ◽  
Confinement Fusion ◽  
Indirect Drive

It is proposed that it is possible to amplify the energy of a pulsed laser beam by imploding it inside a capillary metallic liner. If imploded with megaampere currents by the pinch effect, implosion velocities up to ∼3 × 108 cm/s can be reached, imploding a few cm long liner with an inner radius of 2 × 10−3 cm in about ∼10−10 s. If the liner radius can be imploded by 30-fold, the laser pulse would in the absence of absorption losses into the linear wall be amplified 1000-fold. Because the amplification is through the conversion from longer to shorter wave lengths, the concept offers the prospect of intense short wave length laser pulses in the far ultraviolet and soft X-ray domain. Apart from the direct drive laser beam compression by the pinch effect, an alternative indirect drive through the conversion of the electric pulse power into soft X-rays is possible as well. The limitations of this concept are the absorption losses into the liner wall, and ways to overcome these losses are presented. The most important application of the proposed laser amplification scheme might be for the fast ignition of various inertial confinement fusion schemes. An integrated fast ignition inertial confinement fusion concept using the indirect drive is also presented.

scholarly journals Laser beam zooming and deflection using a nonlinear metamaterial refracting medium

2018 ◽  
Vol 5 ◽  
pp. 8
Author(s):  
Andrew James Comley
Keyword(s):  
Laser Beam ◽  
Inertial Confinement Fusion ◽  
Analytical Approach ◽  
Focal Spot ◽  
Spot Size ◽  
Inertial Confinement ◽  
Lower Intensity ◽  
Focal Spot Size ◽  
Confinement Fusion ◽  
Nonlinear Metamaterial

In-process control of the focal spot size and pointing position of a laser as it interacts with a target (beam zooming and deflection) offers the possibility of unprecedented efficiency improvements in a number of applications, such as inertial confinement fusion and laser micromachining. Here is described a system in which the focussing characteristics of a laser beam at one wavelength can be controlled by a lower-intensity beam at another wavelength, via their mutual interaction with a nonlinear metamaterial refracting medium. Such a metamaterial approach permits the optical response of the medium to be tailored according to the wavelengths of interest and time response required in a given application. A metamolecule unit cell design is described in terms of an equivalent circuit based on a pair of LCR (inductance, capacitance, resistance) circuits coupled by a common nonlinear capacitor. The circuit is studied using an analytical approach to obtain an understanding of its properties and design relationships between circuit parameters. Potential realisations of the circuit are discussed.

Analysis of electroless nickel thin films

1991 ◽  
Vol 49 ◽  
pp. 510-511 ◽  
Author(s):  
C. W. Price ◽  
E. F. Lindsey
Keyword(s):  
Thin Films ◽  
Inertial Confinement Fusion ◽  
Electroless Nickel ◽  
Inertial Confinement ◽  
Plating Bath ◽  
X Ray ◽  
Nickel Thin Films ◽  
Nickel Deposits ◽  
Confinement Fusion ◽  
Thickness Measurements

Thickness measurements of thin films are performed by both energy-dispersive x-ray spectroscopy (EDS) and x-ray fluorescence (XRF). XRF can measure thicker films than EDS, and XRF measurements also have somewhat greater precision than EDS measurements. However, small components with curved or irregular shapes that are used for various applications in the the Inertial Confinement Fusion program at LLNL present geometrical problems that are not conducive to XRF analyses but may have only a minimal effect on EDS analyses. This work describes the development of an EDS technique to measure the thickness of electroless nickel deposits on gold substrates. Although elaborate correction techniques have been developed for thin-film measurements by x-ray analysis, the thickness of electroless nickel films can be dependent on the plating bath used. Therefore, standard calibration curves were established by correlating EDS data with thickness measurements that were obtained by contact profilometry.

scholarly journals Pulsed power indirect drive approach to inertial confinement fusion

2020 ◽  
Vol 36 ◽  
pp. 100749 ◽  
Author(s):  
R.E. Olson ◽  
R.J. Leeper ◽  
S.H. Batha ◽  
R.R. Peterson ◽  
P.A. Bradley ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Pulsed Power ◽  
Inertial Confinement ◽  
Confinement Fusion ◽  
Indirect Drive

Shell mass effect on the hot-spot pressure in inertial confinement fusion implosion

2021 ◽  
Vol 28 (3) ◽  
pp. 032713
Author(s):  
Dongguo Kang ◽  
Huasen Zhang ◽  
Shiyang Zou ◽  
Wudi Zheng ◽  
Shaoping Zhu ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Hot Spot ◽  
Mass Effect ◽  
Inertial Confinement ◽  
Shell Mass ◽  
Confinement Fusion
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