Mechanical Properties of Organic Materials Used in Superconducting Magnets Irradiated by Gamma Rays at Liquid Nitrogen Temperature

Journal Article · Fri Mar 31 04:00:00 EST 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2192355· OSTI ID:20800171

Nakamoto, T; Kimura, N; Makida, Y; Ogitsu, T; Ohhata, H; Yamamoto, A ^[1]; Idesaki, A; Morishita, N; Itoh, H; Kamiya, T ^[2]

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1. High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki, 305-0801 (Japan)
2. Japan Atomic Energy Research Institute, Takasaki, Gunma, 370-1292 (Japan)

Radiation resistance of organic materials used in superconducting magnets for a 50 GeV-750 kW proton beam line for the J-PARC neutrino experiment was studied with respect to mechanical properties. Specimens cooled at a liquid nitrogen temperature of 77 K were irradiated by gamma rays from 60Co with the maximum dose beyond 10 MGy. The flexural strength of glass-fiber reinforced plastics (GFRPs), the tear strength of polyimide films and the tensile lap-shear strength of adhesive films were evaluated. It was verified that the organic materials used in the superconducting magnets have the sufficient radiation resistance, and the degradation of their mechanical properties after the 10 years operation was estimated to be negligible.

• OSTI ID: 20800171
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 824; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COBALT 60
CRYOGENICS
DOSES
FIBERGLASS
FILMS
FLEXURAL STRENGTH
GAMMA RADIATION
GEV RANGE
IRRADIATION
PHYSICAL RADIATION EFFECTS
PROTON BEAMS
REINFORCED PLASTICS
SHEAR PROPERTIES
SUPERCONDUCTING MAGNETS
TENSILE PROPERTIES