Gamma-ray irradiation tests of High-Tc SQUID
Creators
- 1. Tokyo Denki Univ., Applied Superconductivity Research Laboratory, Inzai, Chiba (Japan)
- 2. Sumitomo Electric Hightechs Co., Ltd., Development Division, Itami, Hyogo (Japan)
- 3. Japan Atomic Energy Research Inst., Takasaki, Gunma (Japan). Takasaki Radiation Chemistry Research Establishment
Description
Gamma-ray irradiation tests of High-Tc SQUIDs were carried out to examine their workability in nuclear reactor environments. The SQUIDs were made of a HoBa2Cu3O7-x superconductive thin film on SrTiO3 substrates. Some were encapsulated in separate cases of glass-fiber-rein-forced epoxy resin. Gamma-ray irradiation was performed with a Co-60 gamma-ray source. Irradiation dose rates were (8.1 to 12.2) x 103 Gy/h (i.e., (1.0 to 1.5) x 106 R/h), and the maximum absorption dose was about 10.4 MGy. During and after irradiation, noises of SQUIDs were measured with a power spectrum analyzer. Changes in modulation voltage were also investigated. No gamma-ray induced noise was observed during irradiation. The noise level and modulation voltage did not change until a total irradiation dose of about 3 MGy, and after that it decreased slightly. We concluded that the tested high-Tc SQUIDs are very resistant to gamma-ray irradiation, and thus the application of high-Tc SQUIDs in inspection of reactor components seems promising. (author)
Additional details
Publishing Information
- Journal Title
- Nippon Oyo Jiki Gakkai-Shi
- Journal Volume
- 26
- Journal Issue
- 4
- Journal Page Range
- p. 530-534
- ISSN
- 0285-0192
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 33036194
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- ELECTRIC CONDUCTIVITY; GAMMA RADIATION; HIGH-TC SUPERCONDUCTORS; HOLMIUM COMPOUNDS; IRRADIATION; NOISE; OXIDES; PERFORMANCE TESTING; SQUID DEVICES; TEMPERATURE DEPENDENCE
- Descriptors DEC
- CHALCOGENIDES; ELECTRICAL PROPERTIES; ELECTROMAGNETIC RADIATION; ELECTRONIC EQUIPMENT; EQUIPMENT; FLUXMETERS; IONIZING RADIATIONS; MEASURING INSTRUMENTS; MICROWAVE EQUIPMENT; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RADIATIONS; RARE EARTH COMPOUNDS; SUPERCONDUCTING DEVICES; SUPERCONDUCTORS; TESTING; TYPE-II SUPERCONDUCTORS
Optional Information
- Notes
- 5 refs., 8 figs., 1 tab.