請用此 Handle URI 來引用此文件：
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/66178完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 石明豐(Ming-Feng Shih) | |
| dc.contributor.author | Chia-Teng Hsu | en |
| dc.contributor.author | 許家騰 | zh_TW |
| dc.date.accessioned | 2021-06-17T00:24:34Z | - |
| dc.date.available | 2012-06-27 | |
| dc.date.copyright | 2012-06-27 | |
| dc.date.issued | 2012 | |
| dc.date.submitted | 2012-05-01 | |
| dc.identifier.citation | [1] H. Xia, A. Ben-Amar Baranga, D. Hoffman, and M. V. Romalis, Applied Physics Letters, Vol.89, 211104.
[2] I. K. Komini, T. W. Kornack, J. C. Allred, M. V. Romalis, Letters to Nature, Vol422, 10 April 2003. [3] A. Kastler, J. Phys. Radium 11, 225, 1950. [4] R. W. Wood, Philos. Meg. 44 , 1109, 1922. [5] R. W. Wood and A. Ellett, Proc. R. Soc. London 103, 1923. [6] R. W. Wood and A. Ellett, Phys. Rev. 24, 243, 1924. [7] W. Bell and A. Bloom, Phys. Rev. 107, 1559, 1957. [8] W. Bell and A. Bloom, Phys. Rev. Lett. 6, 280, 1961. [9] H. Dehmelt, Phys. Rev. 105 1924, 1957. [10] I. K. Kominis, T. W. Kornack, J. C. Allred and M. V. Romalis, Nature, vol. 422, 2003 [11] D. Budker and M. Romalis, Nature Physics, vol. 3, 2007 [12] D. Macaluso and O. M. Corbino, Nuovo Cimento, 8, 257, (1898) [13] D. Macaluso and O. M. Corbino, Nuovo Cimento, 9, 384, (1898) [14] D. Budker, W. Gawlik, D. F. Kimball et al., A. Weis, Reviews of Modern Physics, 74, 2002 [15] P. Zeeman, Phil. Mag., 43, 226, (1897) [16] P. Zeeman, Nature, 55, 347, (1897) [17] Szymon Pustelny, “Nonlinear magneto-optical effects,” DISSERTATION, Marian Smoluchowski Institute of Physics, Jagiellonian University, 2007 [18] Tzu Yu Wu, “Shielded three axis vector operation of a multichannel atomic magnetometer,” M. S. thesis, Department of Physics, National Taiean University, 2009. [19] S. Appelt, A. B. Baranga, C. J. Erikson, M. V. Romalis, Physical Review A, 58, 1412, 1998 [20] S. J. Selter and M. V. Romalis, Applied Physics Letters, 85, 2004 [21] M. P. Ledbetter, I. M. Savukov, V. M. Acosta, and D. Budker, Physical Review A, 77, 033408, 2008 [22] Alexander Gusarov, David Levron, Andrei Ben-Amar Baranga, Eugene Paperno, Reuben Shuker , Journal of Applied Physics, Vol.109, Iss.7, pp.07E507, 2011 [23] W. Happer and B. Mathur, Phys. Rev. 163, 12 (1967) [24] T. W. Kornack, Ph.D. thesis, Princeton University, 2005 [25] T. L. Yang, “Spin-Exchange Relaxation Free Potassium Atomic Magnetometer in the Un-shielded Environment,” M. S. thesis, Department of Physics, National Taiean University, 2008 [26]http://www.toptica.com/products/photonicals/adjustable_anamorphic_prism_pair_ app_j.html [27] J. S. Guzman, A. Wojciechowski, J. E. Stalnaker, K. Tsigutkin, V. V. Yashchuk, D. Budker, Phys. Rev. A 74(5) 053415 (2006) [28] T. G. Tiecke, “Properties of Potassium,” van der Waals-Zeeman institute, University of Amsterdam, 2010 [29] J. C. Allred, R. N. Lyman, T. W. Kornack and M. V. Romalis, 2002, Phys. Rev. Lett. 89, 13 [30] R. W. Boyd, Nonlinear Optics, Academic Press, first edition (1984) [31] Y. C. Lin, “Shielded Potassium Atomic Magnetometer with Infrared Heating,” M. S. thesis, Department of Physics, National Taiean University, 2011 [32] T. J. Sumner et al J. Phys. D: Appl. Phys. 20 1095 (1987) [33] www.ic.sunysb.edu/Class/phy122ps/labs/dokuwiki/doku.php?id=phy124off:lab_8 [34] I. M. Savukov and M. V. Romalis, Phys. Rev. A 71, 023405 (2005) [35] A.B. Matsko, I. Novikova, M.O. Scully, G.R. Welch, Physical. Review Letters 87, 133601 (2001). [36] Y. C. Lin, “Shielded Potassium Atomic Magnetometer with Infrared Heating,” M. S. thesis, Department of Physics, National Taiean University, 2011 | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/66178 | - |
| dc.description.abstract | 高靈敏度測磁計在很多領域中都有廣泛的應用，包括物理，生物以及地質等的磁場量測。低溫超導量子干涉儀是磁性測量領域中的紀錄保持者，但維持它的工作溫度需用到液態氦來降溫，也因而造成高額的花費，這個缺點局限了它的運用。近年來，鹼金屬原子測磁計的發展日新月異，到達了與低溫超導量子干涉儀同樣的靈敏度1 ft/√Hz，與此同時，卻沒有其高額花費的缺點。鹼金屬測磁計的原理主要是藉由測量金屬原子自旋極化於極小磁場下的拉莫徑動，進而了解環境磁場的大小。其靈敏度的主要限制是來自於量子雜訊。量子雜訊的大小跟垂直磁場的自旋緩和效率有關，又已知垂直磁場的自旋緩和效率主要是自旋交換碰撞導致。所以可以藉由製造零磁場環境來排除自旋交換碰撞的影響，使自旋緩和效率變的極小。在此條件下，我們稱該原子測磁計為不受自旋交換緩和影響的原子測磁計，這樣的雜訊約略為0.3 ft/√Hz。此論文是在這些理論的基礎之下，模擬以及實驗使系統參數最佳化藉以得到較佳的靈敏度。於驅動雷射的強度為 0.52 W/cm^2時，可得到探測光共振在此系統中的最小寬度是210 μG，此寬度比原有設定之下的寬度小了3倍。此外，藉由平衡偵測器的使用與探測雷射光極化角度的調整使光雜訊從mV變成μV的數量級。 | zh_TW |
| dc.description.abstract | High sensitivity magnetometers are applied in many fields including physics, biology, and geology. For detection of magnetic fields, low-temperature superconducting quantum interference device (SQUID) magnetometers give the most sensitive performance traditionally. However, to maintain SQUID working in the low temperature requires relatively high cost. Recently, alkali-metal magnetometers approach the same sensitivity level without this drawback. The principle of atomic magnetometers is based on the detection of Larmor spin precession in the magnetic fields. The fundamental sensitivity limit of atomic magnetometers comes from the shot noise which is associated with the transverse relaxation time. Spin exchanged collisions contributes to the transverse relaxation time mostly, and it can be reduced by operating in the environment with a near zero magnetic field. As the condition is introduced, it can reduce the noise limit down to 0.3 ft/√Hz. Such environment character is called spin exchange relaxation free (SERF). In this thesis, I analyze the system with simulations and experiments in an attempt to reach the optimization. The narrowest width 210 μG of the dispersion curves is read with the pump beam intensity 0.52 W/cm^2. Besides, the low optical noise system is built via applying a balance detector with appropriately adjusting the polarization of probe beam. The noise level decreases from mV to μV as compared from our previous system. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-17T00:24:34Z (GMT). No. of bitstreams: 1 ntu-101-R98245013-1.pdf: 2624601 bytes, checksum: 367a19dc6c00f21abdb57758ffc41a1b (MD5) Previous issue date: 2012 | en |
| dc.description.tableofcontents | 摘要 i
Abstract ii CONTENTS iii LIST OF FIGURES v LIST OF TABLES viii Chapter 1 Theory of Atomic Magnetometer 1 1.1. Introduction to Atomic Magnetometer 1 1.2. Linear Magneto-Optical Effects 2 1.3. Optical Pumping System 8 1.4. Spin Relaxation and Probe Beam Detection 11 Chapter 2 Experiment Apparatus 17 2.1 Optical System 19 2.1.1 Probe Laser 19 2.1.2 Pump Laser 21 2.1.3. Potassium Cell 22 2.1.4. EO Crystal and Lock-in Amplifier 23 2.2. Heating System 26 2.3. Magnetic shielding package 28 2.3.1 Mu-metal and Aluminum Shields 28 2.3.2 Three-Axis Helmholtz Coils 30 Chapter 3 Experiment Results 33 3.1. Optical noise 33 3.2. Width of the resonance 39 Chapter 4 Summary and future work 46 REFERENCE 48 | |
| dc.language.iso | en | |
| dc.subject | 光驅動 | zh_TW |
| dc.subject | 原子測磁計 | zh_TW |
| dc.subject | 拉莫徑動 | zh_TW |
| dc.subject | 不受自旋交換影響 | zh_TW |
| dc.subject | 自旋交換碰撞 | zh_TW |
| dc.subject | optical pumping | en |
| dc.subject | Atomic magnetometers | en |
| dc.subject | Larmor precession | en |
| dc.subject | spin exchange relaxation free (SERF) | en |
| dc.subject | Spin exchanged collisions | en |
| dc.title | 系統最佳化的低光雜訊原子測磁計 | zh_TW |
| dc.title | Low Optical Noise Atomic Magnetometer with System Optimization | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 100-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 陳政維(Jeng-Wei Chen),楊鴻昌(Hong-Chang Yang) | |
| dc.subject.keyword | 原子測磁計,拉莫徑動,不受自旋交換影響,自旋交換碰撞,光驅動, | zh_TW |
| dc.subject.keyword | Atomic magnetometers,Larmor precession,spin exchange relaxation free (SERF),Spin exchanged collisions,optical pumping, | en |
| dc.relation.page | 50 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2012-05-03 | |
| dc.contributor.author-college | 理學院 | zh_TW |
| dc.contributor.author-dept | 應用物理所 | zh_TW |
| 顯示於系所單位： | 應用物理研究所 | |
文件中的檔案：
| 檔案 | 大小 | 格式 | |
|---|---|---|---|
| ntu-101-1.pdf 未授權公開取用 | 2.56 MB | Adobe PDF |
系統中的文件，除了特別指名其著作權條款之外，均受到著作權保護，並且保留所有的權利。