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Division Spotlight
Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
Meeting Spotlight
Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Christmas Night
Twas the night before Christmas when all through the houseNo electrons were flowing through even my mouse.
All devices were plugged in by the chimney with careWith the hope that St. Nikola Tesla would share.
H. Xu, A. Nikroo, J. R. Wall, R. Doerner, M. Baldwin, J. H. Yu
Fusion Science and Technology | Volume 49 | Number 4 | May 2006 | Pages 778-785
Technical Paper | Target Fabrication | doi.org/10.13182/FST06-A1201
Articles are hosted by Taylor and Francis Online.
Beryllium is one of the preferred ablators for achieving ignition in inertial confinement fusion (ICF). Thin and thick coatings of Be on CH shells have been deposited using a sputter coater established at UCSD's PISCES facility and examined using a variety of characterization techniques. Due to the spherical nature of these substrates, shadowing effects are expected to play significant roles in film growth as well as the expected surface diffusion length of deposited atoms. Be coatings on flat surfaces and spherical surfaces have been deposited and compared to understand the material growth behaviors on different surfaces and as a function of processing parameters. On flat surfaces, Be film developed polycrystalline morphology with columnar growth. On spherical surfaces, Be film also showed columnar growth at lower powers, which then transitioned into a twisted grain structure at higher powers. Cycling of parameters has been used to investigate possible grain growth interruption during growth and improving morphology. Initial results also suggest that copper doping during deposition does not change the columnar growth morphology. Measurements of the surface roughness of beryllium-coated shells indicate roughness growth proportional to the thickness with an exponent of 0.8 to 1.2, which is consistent with shadowing dominated roughening. As ion-beam-assisted growth may improve the surface finish and micro-structure of deposited films, we have also studied the effect of process parameters on the flux and energy of the ions reaching the substrates using an offline energy dispersive mass spectrometer system.