Ultrathick Boron Carbide Coatings for Nuclear Fusion Targets

Shin, Swanee J.; Bayu Aji, Leonardus B.; Engwall, Alison M.; Bae, John H.; Taylor, Gregory V.; Mirkarimi, Paul B.; Aracne-Ruddle, Chantel; Nguyen, Jack; Kong, Casey W. N.; Kucheyev, Sergei O.

doi:10.1080/15361055.2023.2194238

Ultrathick Boron Carbide Coatings for Nuclear Fusion Targets

Journal Article · Wed May 03 00:00:00 EDT 2023 · Fusion Science and Technology

DOI:https://doi.org/10.1080/15361055.2023.2194238· OSTI ID:2006767

^[1]; Bayu Aji, Leonardus B. ^[1]; Engwall, Alison M. ^[1]; Bae, John H. ^[2]; Taylor, Gregory V. ^[1]; Mirkarimi, Paul B. ^[1]; Aracne-Ruddle, Chantel ^[1]; Nguyen, Jack ^[1]; Kong, Casey W. N. ^[2]; Kucheyev, Sergei O. ^[1]

Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
General Atomics, San Diego, CA (United States)

Boron carbide is an attractive ablator for next-generation inertial confinement fusion (ICF) targets. Here we describe several aspects of our ongoing systematic studies of the deposition and processing of B₄C coatings for ICF targets. We show that residual compressive stress in films can be reduced and the deposition rate increased by N-doping. Further, we also demonstrate successful Si substrate etching and surface polishing and discuss remaining challenges and offer potential solutions to the buildup of particulates in the deposition chamber during prolonged coating runs, control of nodular growth defects, and lateral nonuniformity of film properties for deposition conditions with relatively low target-to-substrate distances.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); General Atomics, San Diego, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: AC52-07NA27344; 89233119CNA000063

OSTI ID:: 2006767

Report Number(s):: LLNL--JRNL-840162; 1061358

Journal Information:: Fusion Science and Technology, Journal Name: Fusion Science and Technology Journal Issue: 7 Vol. 79; ISSN 1536-1055

Publisher:: Taylor & FrancisCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Boron carbide
DCMS
Inertial confinement fusion targets
Nitrogen doping
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Ultrathick Boron Carbide Coatings for Nuclear Fusion Targets

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