Radiation-induced rf loss measurements and thermal-stress calculations for ceramic windows

Technical Report · Sat Jan 01 04:00:00 EST 1983

DOI:https://doi.org/10.2172/5668710· OSTI ID:5668710

Fowler, Jr, J D

Irradiation with high energy neutrons can cause increases in loss tangent and thermal resistivity for some ceramics. Loss tangents over the range 0.02 to several MHz have been measured for single and polycrystalline aluminum oxide and polycrystalline beryllium oxide, after irradiation with a spallation neutron source. Some samples of single crystal aluminum oxide were also irradiated with 14-MeV neutrons at RTNS-II to compare spectral effects. Significant increases in loss tangent were observed at the higher frequencies for the RTNS-II irradiated material. Numerical calculations of thermal stresses in rf windows, based on heating from dielectric losses and thermal conductivities, show that stresses can exceed measured fracture strengths in these materials.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5668710
• Report Number(s): LA-UR-83-2783; CONF-830942-40; ON: DE84001304
• Country of Publication: United States
• Language: English

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ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARYON REACTIONS
BERYLLIUM COMPOUNDS
BERYLLIUM OXIDES
CERAMICS
CHALCOGENIDES
DATA
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
FRACTURE PROPERTIES
HADRON REACTIONS
INFORMATION
MECHANICAL PROPERTIES
NEUTRON REACTIONS
NEUTRON SOURCES
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
OPENINGS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SOURCES
PHYSICAL PROPERTIES
RADIATION SOURCES
RADIATIONS
RADIOWAVE RADIATION
STRESSES
THERMAL CONDUCTIVITY
THERMAL STRESSES
THERMODYNAMIC PROPERTIES
WINDOWS