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標題: Design and Simulation of the Superconducting Quantum Interference Device Measurement System with Planar Gradiometers
作者: 鄭培煜
Cheng, Pei-Yu
關鍵字: 量子超導干涉儀
Superconducting Quantum Interference Device
Planar Gradiometers
出版社: 物理學系所
引用: [1] J. Clarke, Proc. IEEE, 77, 1208 (1989). [2] D. Drung, R. Cantor, M. Peters, H. J. Scheer, and H. Koch, Appl. Phys. Lett. 57, 406 (1990). [3] R. Cantor, L. P. Lee, M. Teepe, V. Vinetskiy, and J. Longo, IEEE Trans. Appl. Supercond. 5, 2927 (1995). [4] R. S. Popović, Hall effect devices: magnetic sensors and characterization of semiconductors, Bristol (1991). [5] Pavel Ripka, “Fluxgate Sensors,” in Magnetic sensors and magnetometers. Artech Boston (2001). [6] Hans Hauser and Mark Tondra, “Magnetoresistors,” in Magnetic sensors and magnetometers (2000). [7] B. D. Josephson, Phys. Lett. 1, 251 (1962). [8] P. W. Anderson and J. M. Rowell, Phys. Rev. Lett. 10, 230 (1963). [9] 楊鴻昌,〈約瑟芬效應簡介〉,《物理雙月刊》5, 189 (1983)。 [10] R. C. Jaklevic, J. Lambe, A. H. Silver, and J. E. Mercereau, Phys. Rev. Lett. 12, 159 (1964). [11] A. H. Silver and J. E. Zimmerman, Phys. Rev. Lett. 15, 888 (1965). [12] C. Kittel, “ Introduction to Solid State Physics” Eighth edition Wiley (2005). [13] M. Tinkham , “Introduction to superconductivity” Second edition McGraw-Hill (1995). [14] A. H. Miklich, John Clarke, M. S. Colcough and K. Char, Appl. Phys. Lett. 60, 1899 (2002). [15] Tesche and J. Clarke, Low Temp. Phys. 29,301 (1977). [16] D. Koelle, R. Kleiner, F. Ludwig, E. Dantsker and John Clarke, Reviews of Modern Physics 71, 613 (1999). [17] K. Eupuku, Y. Shimomura, and T. Kisu, J. Appl.Phys. 73, 7929 (1993). [18] D.Drung, R. Cantor, M. Peters, H. J. Scheer, and H. Koch, Appl. Phys. Lett. 57,406 (1990). [19] John Clarke and Alex I. Braginski. “the SQUID Handbook” 11 (2004). [20] PcSQUID User`s manual, Star Cryoelectronics, 25-A Bisbee Court Santa Fe, NM 87508, USA (2006). [21] David K. Cheng, “Field and Wave Electromagnetics” Second edition Addison Wesley (1989). [22] Antonio Barone, “Superconducting Quantum Interference Devices”, World Scientific (1992).
摘要: 超導量子干涉元件已經被廣為用在微小磁場訊號的探測。在系統上加了平面梯度計讓我們可以用這套系統把外界的背景訊號給去除。我們利用平面梯度計以及超導量子干涉元件建構出一套測量系統來測量在強磁場影響下GaAs的磁矩變化。我們利用數學模擬軟體去估算樣品所可以產生的磁通量大小、線圈的電感和最後可以被測量到的電壓訊號,以及分析超導量子干涉元件測量系統的回授系統。估算出來在AC訊號頻率為221Hz的情況之下,可以得到的輸出電壓值約為10mV。最後我們提出可以增加磁通的方法像是增加梯度計的線圈匝數,以及將AC訊號頻率提高,如此一來可以預期讓訊號提升2至3個數量級,在未來的實驗中做修正。
Superconducting QUantum Interference Devices (SQUIDs) have been extensively used in the detection of very small magnetic signals. We have designed a SQUID measurement system including a pick-up coil in a gradiometer configuration which can cancel the background noise and strong uniform DC magnetic field. We use this system to detect the variation of the magnetic dipoles of GaAs in a strong magnetic field. We have estimated the flux from the sample, inductance of the coils and also the detecting limit of the voltage signal. We demonstrate the operation method of the feedback loop worked in our SQUIDs measurement system. At the end, we propose several methods to improve the sensitivity, such as increasing the number of the coil and the frequency of the AC signal. We expect the detected signal can be enhanced around 2 to 3 orders of magnitude.
其他識別: U0005-1607201018281100
Appears in Collections:物理學系所



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