Ultrasmooth plasma polymerized coatings for laser fusion targets

Conference · Tue Aug 26 00:00:00 EDT 1980

OSTI ID:5117809

Letts, S A; Myers, D W; Witt, L A

Coatings for laser fusion were deposited up to 135..mu..m thick by plasma polymerization onto 140 ..mu..m diameter DT filled glass microspheres. Ultrasmooth surfaces (no defect higher than 0.1 ..mu..m) were achieved by eliminating particulate contamination. Process generated particles were eliminated by determining the optimum operating conditions of power (20 watts), gas flow (0.3 sccm trans-2-butene, 10.0 sccm hydrogen), and pressure (75 millitorr), and maintaining these conditions through feedback control. From a study of coating defects grown over known surface irregularities, a quantitative relationship between irregularity size, film thickness, and defect size was determined. This relationship was used to set standards for the maximum microshell surface irregularity tolerable in the production of hydrocarbon or fluorocarbon coated laser fusion targets.

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5117809
• Report Number(s): UCRL-844475; CONF-801037-12; TRN: 80-016002
• Resource Relation: Conference: American Vacuum Society conference, Detroit, MI, USA, 13 Oct 1980
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
LASER TARGETS
COATINGS
DEUTERIUM TRITIDES
MICROSPHERES
PLASMA
POLYMERIZATION
SIZE
THICKNESS
CHEMICAL REACTIONS
DEUTERIUM COMPOUNDS
DIMENSIONS
HYDROGEN COMPOUNDS
LABELLED COMPOUNDS
TARGETS
TRITIUM COMPOUNDS
060201* - Fusion Fuels- Fabrication & Testing- (1980-1987)