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Fusion Science and Technology
Latest News
DNFSB’s Summers ends board tenure, extending agency’s loss of quorum
Lee
Summers
The Defense Nuclear Facilities Safety Board, the independent agency responsible for ensuring that Department of Energy facilities are protective of public health and safety, announced that the board’s acting chairman, Thomas Summers, has concluded his service with the agency, having completed his second term as a board member on October 18.
Summers’ departure leaves Patricia Lee, who joined the DNFSB after being confirmed by the Senate in July 2024, as the board’s only remaining member and acting chair. Lee’s DNFSB board term ends in October 2027.
Keiji Nagai, Takayoshi Norimatsu, Noriaki Miyanaga, Tatsuhiko Yamanaka
Fusion Science and Technology | Volume 41 | Number 3 | May 2002 | Pages 257-260
Technical Paper | Fourteenth Target Fabrication Specialists' Meeting | doi.org/10.13182/FST02-A17910
Articles are hosted by Taylor and Francis Online.
This paper describes a possibility to control of laser ablation using material functionality. As an example, a remarkable difference is shown in the laser ablation of a polystyrene film coated with a photovoltaic perylene/phthalocyanine bilayer when compared with a bare polystyrene film after irradiation at an intensity range of 109 ∼ 1010W/cm2 (λ=1064 nm, 1.1-ns FWHM). Without the bilayer coating, the laser pulse formed spiky structures in the polystyrene film as self-focusing traces of the laser pulse, while for the coated film, the uniform surface ablation trace without the spiky interior structures was observed. The phenomena in the presence of the organic photovoltaic coating material agree with the required ablation to achieve high-density compression of the fuel capsule for inertial fusion energy.