Pulsed X-Ray Exposures and Modeling for Tungsten as an IFE First Wall Material

Journal Article · Fri Apr 15 04:00:00 EDT 2005 · Fusion Science and Technology

OSTI ID:20849929

Latkowski, J F; Abbott, R P; Schmitt, R C ^[1]

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1. Lawrence Livermore National Laboratory Livermore (United States)

Dry-wall inertial fusion energy (IFE) power plants must survive repeated exposure to target threats that include x-rays, ions, and neutrons. While this exposure may lead to sputtering, exfoliation, transmutation, and swelling, more basic effects are thermomechanical in nature. In the present work, we use the newly developed RadHeat code to predict time-temperature profiles in a tungsten armor, which has been proposed for use in an IFE power plant. The XAPPER x-ray damage experiment is used to simulate thermal effects by operating at fluences that produce similar peak temperatures, temperature gradients, or thermomechanical stresses. Soft x-ray fluences in excess of 1 J/cm{sup 2} are possible. Using RadHeat, we determine the XAPPER x-ray fluence needed to match expected peak surface temperatures. Such calculations are the first step in predicting the thermomechanical effects that are expected in an IFE system. Here, we report our findings and detail directions for future experiments and modeling.

• OSTI ID: 20849929
• Journal Information: Fusion Science and Technology, Journal Name: Fusion Science and Technology Journal Issue: 3 Vol. 47; ISSN 1536-1055
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COMPUTERIZED SIMULATION
FIRST WALL
ICF DEVICES
INERTIAL CONFINEMENT
INERTIAL FUSION DRIVERS
IONS
NEUTRONS
PLASMA SIMULATION
SOFT X RADIATION
SPUTTERING
STRESSES
SWELLING
TEMPERATURE DEPENDENCE
TEMPERATURE GRADIENTS
THERMONUCLEAR POWER PLANTS
TRANSMUTATION
TUNGSTEN