Capillary gas filling of inertial fusion targets

Journal Article · Thu Apr 01 00:00:00 EST 1982 · J. Vac. Sci. Technol.; (United States)

DOI:https://doi.org/10.1116/1.571548· OSTI ID:5572082

Brinker, B A; Miller, J R

High-Z gases are often added to the DT fuel in inertial fusion targets to provide a means for diagnosing target implosion conditions. Various techniques have been used to incorporate some nonfuel gases into fusion targets including permeation, drill-fill-plug, and vertical drop-oven filling. We have developed a new fabrication technique which permits filling fusion targets with most high-Z gases but which does not add geometric perturbations to the stalk-mounted target. The first step of this new technique is to mount a glass microballoon on a thin drawn glass capillary in the usual manner. A few micrometer diameter hole is drilled through the shell at the capillary location with a focused 1.05 ..mu..m wavelength laser. Pusher and ablator layers are then coated onto the capillary mounted shell. The desired gas mixture is introduced into the target through the capillary which is then sealed closed. The gas fill capillary, equivalent in dimensions to the normal target mounting stalk, supports the target during the implosion experiment. In addition, the gas-filled volume in the capillary acts as a reservoir, replenishing gas that permeates out of the target. We have also used this fabrication technique to produce a target which serves as a calibration standard for interferometric characterization.

• Research Organization: Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623
• OSTI ID: 5572082
• Journal Information: J. Vac. Sci. Technol.; (United States), Vol. 20:4
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
LASER TARGETS
FABRICATION
MICROSPHERES
CALIBRATION
CAPILLARIES
DEUTERIUM
GAS FLOW
GASES
LASER IMPLOSIONS
TRITIUM
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BLOOD VESSELS
BODY
CARDIOVASCULAR SYSTEM
FLUID FLOW
FLUIDS
HYDROGEN ISOTOPES
IMPLOSIONS
ISOTOPES
LIGHT NUCLEI
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
ORGANS
RADIOISOTOPES
STABLE ISOTOPES
TARGETS
YEARS LIVING RADIOISOTOPES
700208* - Fusion Power Plant Technology- Inertial Confinement Technology