Dependence of squid intrinsic flux noise on stewart-mccumber parameter beta(c) of josephson junction
文献类型：期刊论文
| 作者 | Wang, Hai1,2; Wang, Yongliang1; Kong, Xiangyan1; Zhang, Guofeng1; Zhang, Yi3; Xie, Xiaoming1 |
| 刊名 | Ieee transactions on applied superconductivity
 |
| 出版日期 | 2016-08-01 |
| 卷号 | 26期号:5页码:5 |
| 关键词 | Dc superconducting quantum interference device (squid) Intrinsic flux noise Readout electronics Stewart-mccumber parameter beta(c) Two-stage scheme (tss) |
| ISSN号 | 1051-8223 |
| DOI | 10.1109/tasc.2016.2565605 |
| 通讯作者 | Kong, xiangyan(xykong@mail.sim.ac.cn) |
| 英文摘要 | It is known that three superconducting quantum interference device (squid) parameters, namely, the intrinsic flux noise delta phi(s), the flux-to-voltage transfer coefficient partial derivative v/partial derivative phi, and the dynamic resistance r-d, increase with increasing the stewart-mccumber parameter beta(c) of josephson junction. it is very difficult to obtain the low values of dfs for a strongly damped squid due to its small partial derivative v/partial derivative phi. in this paper, we employ a two-stage scheme (tss) to measure dfs directly. here, we use single chip readout electronics and a weakly damped squid with a beta(c) of 1.2, both acting as a readout-squid system (a preamplifier). the flux noise of the readout-squid system is about 4.8 mu phi(0)/root hz with a corner frequency of about 10 hz. the front-end squid is coupled to the readout squid via the input coil with a mutual inductance of m-i. in our experiment, the flux gain for a readout squid, i.e., g(phi) = m-i x (partial derivative i/partial derivative phi)(front-end) is adjusted to be 20. using the tss, we measured dfs with different beta(c) changing from 0.3 to 13.5 and found dfs increasing from 1.0 to 5.0 mu phi(0)root hz. we also discussed the relations between l-s, beta(c), and dfs quantitatively. finally, we proposed designing a suitable beta(c) tomatch the preamplifier in a direct readout scheme to simplify a squid measurement system. |
| WOS关键词 | QUANTUM INTERFERENCE DEVICE ; DC SQUID ; MAGNETOMETER ; ELECTRONICS ; AMPLIFIER |
| WOS研究方向 | Engineering ; Physics |
| WOS类目 | Engineering, Electrical & Electronic ; Physics, Applied |
| 语种 | 英语 |
| WOS记录号 | WOS:000379754100001 |
| 出版者 | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2374734 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Kong, Xiangyan |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Shanghai 20050, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Forschungszentrum Julich, Peter Grunberg Inst PGI 8, D-52425 Julich, Germany |
| 推荐引用方式 GB/T 7714 | Wang, Hai,Wang, Yongliang,Kong, Xiangyan,et al. Dependence of squid intrinsic flux noise on stewart-mccumber parameter beta(c) of josephson junction[J]. Ieee transactions on applied superconductivity,2016,26(5):5. |
| APA | Wang, Hai,Wang, Yongliang,Kong, Xiangyan,Zhang, Guofeng,Zhang, Yi,&Xie, Xiaoming.(2016).Dependence of squid intrinsic flux noise on stewart-mccumber parameter beta(c) of josephson junction.Ieee transactions on applied superconductivity,26(5),5. |
| MLA | Wang, Hai,et al."Dependence of squid intrinsic flux noise on stewart-mccumber parameter beta(c) of josephson junction".Ieee transactions on applied superconductivity 26.5(2016):5. |
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来源：中国科学院大学
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