Design and Simulation of the Superconducting Quantum Interference Device Measurement System with Planar Gradiometers
碩士 === 國立中興大學 === 物理學系所 === 98 === 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 noi...
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ndltd-TW-098NCHU51980142015-10-30T04:05:02Z http://ndltd.ncl.edu.tw/handle/26411779958457707859 Design and Simulation of the Superconducting Quantum Interference Device Measurement System with Planar Gradiometers 量子超導干涉儀及平面梯度計的設計與模擬 Pei-Yu Cheng 鄭培煜 碩士 國立中興大學 物理學系所 98 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. 孫允武 2010 學位論文 ; thesis 40 zh-TW |
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碩士 === 國立中興大學 === 物理學系所 === 98 === 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.
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孫允武 |
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孫允武 Pei-Yu Cheng 鄭培煜 |
author |
Pei-Yu Cheng 鄭培煜 |
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Pei-Yu Cheng 鄭培煜 Design and Simulation of the Superconducting Quantum Interference Device Measurement System with Planar Gradiometers |
author_sort |
Pei-Yu Cheng |
title |
Design and Simulation of the Superconducting Quantum Interference Device Measurement System with Planar Gradiometers |
title_short |
Design and Simulation of the Superconducting Quantum Interference Device Measurement System with Planar Gradiometers |
title_full |
Design and Simulation of the Superconducting Quantum Interference Device Measurement System with Planar Gradiometers |
title_fullStr |
Design and Simulation of the Superconducting Quantum Interference Device Measurement System with Planar Gradiometers |
title_full_unstemmed |
Design and Simulation of the Superconducting Quantum Interference Device Measurement System with Planar Gradiometers |
title_sort |
design and simulation of the superconducting quantum interference device measurement system with planar gradiometers |
publishDate |
2010 |
url |
http://ndltd.ncl.edu.tw/handle/26411779958457707859 |
work_keys_str_mv |
AT peiyucheng designandsimulationofthesuperconductingquantuminterferencedevicemeasurementsystemwithplanargradiometers AT zhèngpéiyù designandsimulationofthesuperconductingquantuminterferencedevicemeasurementsystemwithplanargradiometers AT peiyucheng liàngzichāodǎogànshèyíjípíngmiàntīdùjìdeshèjìyǔmónǐ AT zhèngpéiyù liàngzichāodǎogànshèyíjípíngmiàntīdùjìdeshèjìyǔmónǐ |
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1718114825410707456 |