scholarly journals Time-dependent measurement of high-power laser light reflection by low-Z foam plasma

2021 ◽  
Vol 9 ◽  
Author(s):  
M. Cipriani ◽  
S. Yu. Gus’kov ◽  
F. Consoli ◽  
R. De Angelis ◽  
A. A. Rupasov ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Diagnostic Techniques ◽  
Experimental Results ◽  
Time Dependent ◽  
Light Reflection ◽  
Inertial Confinement ◽  
Solid Media ◽  
Dependent Measurement ◽  
Laser Produced Plasma ◽  
Confinement Fusion

Abstract Porous materials have many applications for laser–matter interaction experiments related to inertial confinement fusion. Obtaining new knowledge about the properties of the laser-produced plasma of porous media is a challenging task. In this work, we report, for the first time to the best of our knowledge, the time-dependent measurement of the reflected light of a terawatt laser pulse from the laser-produced plasma of low-Z foam material of overcritical density. The experiments have been performed with the ABC laser, with targets constituted by foam of overcritical density and by solid media of the same chemical composition. We implemented in the MULTI-FM code a model for the light reflection to reproduce and interpret the experimental results. Using the simulations together with the experimental results, we indicate a criterion for estimating the homogenization time of the laser-produced plasma, whose measurement is challenging with direct diagnostic techniques and still not achieved.

scholarly journals A Novel Spectrometer for Measuring Laser-Produced Plasma X-Ray in Inertial Confinement Fusion

2012 ◽  
Vol 2012 ◽  
pp. 1-5
Author(s):  
Zhu Gang ◽  
Xiong Xian-cai ◽  
Zhong Xian-xin ◽  
Yang Yan
Keyword(s):  
Inertial Confinement Fusion ◽  
Bragg Diffraction ◽  
Bragg Angle ◽  
Experimental Investigations ◽  
Inertial Confinement ◽  
Crystal Spectrometer ◽  
Temperature Plasma ◽  
X Ray ◽  
Laser Produced Plasma ◽  
Confinement Fusion

In the experimental investigations of inertial confinement fusion, the laser-produced high-temperature plasma contains very abundant information, such as the electron temperature and density, ionization. In order to diagnose laser-plasma distribution in space and evolution in time, an elliptical curved crystal spectrometer has been developed and applied to diagnose X-ray of laser-produced plasma in 0.2~2.46 nm region. According to the theory of Bragg diffraction, four kinds of crystal including LiF, PET, MiCa, and KAP were chosen as dispersive elements. The distance of crystal lattice varies from 0.4 to 2.6 nm. Bragg angle is in the range of 30°~67.5°, and the spectral detection angle is in 55.4°~134°. The curved crystal spectrometer mainly consists of elliptical curved crystal analyzer, vacuum configuration, aligning device, spectral detectors and three-dimensional microadjustment devices. The spectrographic experiment was carried out on the XG-2 laser facility. Emission spectrum of Al plasmas, Ti plasma, and Au plasmas have been successfully recorded by using X-ray CCD camera. It is demonstrated experimentally that the measured wavelength is accorded with the theoretical value.

scholarly journals Refraction-enhanced x-ray radiography for inertial confinement fusion and laser-produced plasma applications

2009 ◽  
Vol 105 (11) ◽  
pp. 113112 ◽  
Author(s):  
Jeffrey A. Koch ◽  
Otto L. Landen ◽  
Bernard J. Kozioziemski ◽  
Nobuhiko Izumi ◽  
Eduard L. Dewald ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Inertial Confinement ◽  
X Ray ◽  
Laser Produced Plasma ◽  
Confinement Fusion ◽  
Plasma Applications

Angular radiation temperature simulation for time-dependent capsule drive prediction in inertial confinement fusion

2015 ◽  
Vol 22 (2) ◽  
pp. 022709 ◽  
Author(s):  
Longfei Jing ◽  
Shaoen Jiang ◽  
Dong Yang ◽  
Hang Li ◽  
Lu Zhang ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Time Dependent ◽  
Radiation Temperature ◽  
Inertial Confinement ◽  
Confinement Fusion

scholarly journals Quantitative observation of monochromatic X-rays emitted from implosion hotspot in high spatial resolution in inertial confinement fusion

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kuan Ren ◽  
Junfeng Wu ◽  
Jianjun Dong ◽  
Yaran Li ◽  
Tianxuan Huang ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Inertial Confinement Fusion ◽  
High Spatial Resolution ◽  
Theoretical Calculations ◽  
Photon Number ◽  
Experimental Results ◽  
Inertial Confinement ◽  
X Rays ◽  
Gaussian Source ◽  
Confinement Fusion

AbstractIn inertial confinement fusion, quantitative and high-spatial resolution ($$< 10\,\upmu $$ < 10 μ m) measurements of the X-rays self-emitted by the hotspot are critical for studying the physical processes of the implosion stagnation stage. Herein, the 8 ± 0.39-keV monochromatic X-ray distribution from the entire hotspot is quantitatively observed in 5-$$\upmu $$ μ m spatial resolution using a Kirkpatrick–Baez microscope, with impacts from the responses of the diagnosis system removed, for the first time, in implosion experiments at the 100 kJ laser facility in China. Two-dimensional calculations along with 2.5% P2 drive asymmetry and 0.3 ablator self-emission are congruent with the experimental results, especially for the photon number distribution, hotspot profile, and neutron yield. Theoretical calculations enabled a better understanding of the experimental results. Furthermore, the origins of the 17.81% contour profile of the deuterium-deuterium hotspot and the accurate Gaussian source approximation of the core emission area in the implosion capsule are clarified in detail. This work is significant for quantitatively exploring the physical conditions of the hotspot and updating the theoretical model of capsule implosion.

EFFECTS OF DEUTERIUM–LITHIUM FUSION REACTION ON INTERNAL TRITIUM BREEDING

2010 ◽  
Vol 19 (11) ◽  
pp. 2123-2132
Author(s):  
M. MAHDAVI ◽  
B. JALALY
Keyword(s):  
Inertial Confinement Fusion ◽  
Initial Temperature ◽  
Fusion Reaction ◽  
Time Dependent ◽  
Inertial Confinement ◽  
Tritium Breeding ◽  
Dynamical Equations ◽  
Fuel Pellets ◽  
Runge Kutta Method ◽  
Confinement Fusion

The optimal usage of designed fuel pellets is one of the very important parameters in inertial confinement fusion (ICF) systems. In this research, time-dependent dynamical equations for D/D fuel are written by considering impurity of 6 Li . Then dependency of gain on temperature, density and pellet radius is studied using Runge–Kutta method. The obtained results show that the energy gain will be maximized at the initial temperature 35 keV, density, 5000 g/cm3 and ratio impurity of 6 Li , 0.05.

Basic hydrodynamics of Richtmyer–Meshkov-type growth and oscillations in the inertial confinement fusion-relevant conditions

2010 ◽  
Vol 368 (1916) ◽  
pp. 1739-1768 ◽  
Author(s):  
Y. Aglitskiy ◽  
A. L. Velikovich ◽  
M. Karasik ◽  
N. Metzler ◽  
S. T. Zalesak ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
High Energy ◽  
Diagnostic Techniques ◽  
Impulsive Loading ◽  
Inertial Confinement ◽  
Physical Mechanisms ◽  
Direct Observations ◽  
Confinement Fusion ◽  
Instability Growth ◽  
Experimental And Theoretical Studies

In inertial confinement fusion (ICF), the possibility of ignition or high energy gain is largely determined by our ability to control the Rayleigh–Taylor (RT) instability growth in the target. The exponentially amplified RT perturbation eigenmodes are formed from all sources of the target and radiation non-uniformity in a process called seeding. This process involves a variety of physical mechanisms that are somewhat similar to the classical Richtmyer–Meshkov (RM) instability (in particular, most of them are active in the absence of acceleration), but differ from it in many ways. In the last decade, radiographic diagnostic techniques have been developed that made direct observations of the RM-type effects in the ICF-relevant conditions possible. New experiments stimulated the advancement of the theory of the RM-type processes. The progress in the experimental and theoretical studies of such phenomena as ablative RM instability, re-shock of the RM-unstable interface, feedout and perturbation development associated with impulsive loading is reviewed.

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