Related Experiment Video
Updated: Jan 1, 2026
08:10
Building Langmuir Probes and Emissive Probes for Plasma Potential Measurements in Low Pressure, Low Temperature Plasmas
Published on: May 25, 2021
5.2K
Plasma Density Measurements of the Inner Shell Release
D Haberberger1, A Shvydky1, V N Goncharov1
1Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.
Physical Review Letters
|December 24, 2019
Summary
Material release from CH shells in inertial confinement fusion experiments expanded more than simulations predicted. This expansion reduced implosion performance, specifically lowering areal density at peak compression.
Area of Science:
- Plasma Physics
- Fusion Energy
- Materials Science
Background:
- Inertial confinement fusion (ICF) relies on imploding spherical shells to achieve high energy densities.
- Understanding material behavior during ICF implosions is crucial for optimizing fusion performance.
- CH (plastic) shells are commonly used, but their behavior under extreme conditions requires detailed study.
Purpose of the Study:
- To experimentally probe material release from CH shells opposite the laser drive under ICF-relevant conditions.
- To compare experimental observations with predictions from radiation-hydrodynamic simulations.
- To identify the cause of reduced ICF implosion performance.
Main Methods:
- Experimental investigation of material release from CH shells.
- Utilizing radiation-hydrodynamic simulations for comparison.
- Analyzing shell relaxation and its impact on implosion dynamics.
Main Results:
- Observed material release expanded further and had a longer scale length than simulation predictions.
- Simulations incorporating measured back-side shell relaxation accurately predicted the reduced implosion performance.
- Experimentally verified reduction in areal density at peak compression was linked to shell relaxation.
Conclusions:
- Radiation-hydrodynamic simulations need refinement to accurately model material release in ICF.
- Shell relaxation on the side opposite the laser drive significantly impacts ICF implosion efficiency.
- Accurate modeling of shell dynamics is essential for achieving successful ICF energy production.
Related Concept Videos
01:29Atomic Emission Spectroscopy: Lab
507
AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
507
01:19Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview
1.6K
In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then...
1.6K
03:21The Energies of Atomic Orbitals
29.6K
In an atom, the negatively charged electrons are attracted to the positively charged nucleus. In a multielectron atom, electron-electron repulsions are also observed. The attractive and repulsive forces are dependent on the distance between the particles, as well as the sign and magnitude of the charges on the individual particles. When the charges on the particles are opposite, they attract each other. If both particles have the same charge, they repel each other.
29.6K
01:05Density and Archimedes' Principle
8.4K
When a lump of clay is dropped into water, it sinks. But if the same lump of clay is molded into the shape of a boat, it starts to float. Because of its shape, the clay boat displaces more water than the lump and experiences a greater buoyant force, even though its mass is the same. The same holds true for steel ships. The average density of an object majorly determines if the object will float. If an object's average density is less than that of the surrounding fluid, it will float. The...
8.4K
00:56Density
18.9K
Density is an important characteristic of substances, crucial in determining whether an object sinks or floats in a fluid. Its SI unit is kg/m3, and its cgs unit is g/cm3. The density of an object helps in identifying its composition, and also reveals information about the phase of the matter and its substructure. The densities of liquids and solids are roughly comparable, consistent with the fact that their atoms are in close contact. However, gases have much lower densities than liquids and...
18.9K
01:14Atomic Nuclei: Nuclear Spin State Population Distribution
2.3K
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
2.3K