@article{oai:sucra.repo.nii.ac.jp:00016075,
 author = {山納, 康 and 宮内, 泰寿 and 小林, 信一},
 journal = {埼玉大学紀要. 工学部 第1編 第1部 論文集, The Science and Engineering Reports of Saitama University},
 month = {},
 note = {Arrays of dc-superconducting quantum interference devices (dc-SQUIDs) consisting of at least 100 repeated dc-SQUID elements connected in series were investigated experimentally and analytically to obtain a low noise current amplifier. The dependences of flux noise on the number of the elements and the number of turns of the input coil were examined. It was found that the flux noise is significantly influenced by the dynamic resistance of the array when the number of the elements exceeds 100, although the influence by the dynamic resistance for a single dc-SQUID is negligibly small. It was also found that the flux noise does not depend on the turn number of the input coil. These results agreed well with the measured flux noise for SQUID arrays constructed using a Nb/AlOx/Nb fabrication process. An ultra low current noise of 1 pA/√Hz was achieved using a SQUID array amplifier consisting of 128 dc-SQUID elements, each of which had a 7-turn input coil and a mutual inductance of 460 pH. On the basis of an equation for the flux noise, device parameters were optimized systematically. The optimized SQUID amplifier achieved a dynamic range of 87 dB for input signals of 50 kHz bandwidth, which is sufficiently wide for X-ray detection applications., text, application/pdf},
 pages = {1--5},
 title = {真空中における沿面放電時のリアルタイム帯電分布測に関する研究<論文>},
 volume = {38},
 year = {2005},
 yomi = {ヤマノウ, ヤスシ and ミヤウチ, ヤストシ and コバヤシ, シンイチ}
}