Radial electron beam autoaccelerator for inertial confinement fusion

1984 ◽  
Vol 55 (1) ◽  
pp. 138-149
Author(s):  
J. W. Poukey ◽  
J. P. VanDevender ◽  
J. P. Quintenz ◽  
T. R. Lockner
Keyword(s):  
Electron Beam ◽  
Inertial Confinement Fusion ◽  
Inertial Confinement ◽  
Confinement Fusion

scholarly journals High energy electron radiography scheme with high spatial and temporal resolution in three dimension based on a e-LINAC

2016 ◽  
Vol 34 (2) ◽  
pp. 338-342 ◽  
Author(s):  
Y. Zhao ◽  
Z. Zhang ◽  
W. Gai ◽  
Y. Du ◽  
S. Cao ◽  
...  
Keyword(s):  
Electron Beam ◽  
Temporal Resolution ◽  
Inertial Confinement Fusion ◽  
High Energy ◽  
High Energy Density ◽  
Inertial Confinement ◽  
Three Dimension ◽  
Scattered Electron ◽  
Electron Linear Accelerator ◽  
Confinement Fusion

AbstractWe present a scheme of electron beam radiography to dynamically diagnose the high energy density (HED) matter in three orthogonal directions simultaneously based on electron Linear Accelerator. The dynamic target information such as, its profile and density could be obtained through imaging the scattered electron beam passing through the target. Using an electron bunch train with flexible time structure, a very high temporal evolution could be achieved. In this proposed scheme, it is possible to obtain 1010 frames/second in one experimental event, and the temporal resolution can go up to 1 ps, spatial resolution to 1 µm. Successful demonstration of this concept will have a major impact for both future inertial confinement fusion science and HED physics research.

scholarly journals Direct observation of imploded core heating via fast electrons with super-penetration scheme

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
T. Gong ◽  
H. Habara ◽  
K. Sumioka ◽  
M. Yoshimoto ◽  
Y. Hayashi ◽  
...  
Keyword(s):  
Electron Beam ◽  
Direct Observation ◽  
Inertial Confinement Fusion ◽  
Short Pulse ◽  
Coupling Efficiency ◽  
High Energy ◽  
Inertial Confinement ◽  
Particle In Cell ◽  
Short Pulse Laser ◽  
Confinement Fusion

AbstractFast ignition (FI) is a promising approach for high-energy-gain inertial confinement fusion in the laboratory. To achieve ignition, the energy of a short-pulse laser is required to be delivered efficiently to the pre-compressed fuel core via a high-energy electron beam. Therefore, understanding the transport and energy deposition of this electron beam inside the pre-compressed core is the key for FI. Here we report on the direct observation of the electron beam transport and deposition in a compressed core through the stimulated Cu Kα emission in the super-penetration scheme. Simulations reproducing the experimental measurements indicate that, at the time of peak compression, about 1% of the short-pulse energy is coupled to a relatively low-density core with a radius of 70 μm. Analysis with the support of 2D particle-in-cell simulations uncovers the key factors improving this coupling efficiency. Our findings are of critical importance for optimizing FI experiments in a super-penetration scheme.

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.

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