博碩士論文 105222007 詳細資訊




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姓名 徐郁瑜(Yu-Yu Syu)  查詢紙本館藏   畢業系所 物理學系
論文名稱
(Carbon Flux Analysis with the AMS-02 Experiment)
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★ 利用國際太空站上的反物質磁譜儀精確測量宇宙射線中的反質子與質子通量比的時間變化
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摘要(中) 反物質磁譜儀(Alpha Magnetic Spectrometer, AMS-02)是裝設在國際 太空站(ISS)上的粒子探測器,自2011年運行至今;AMS-02用來精確量 測宇宙射線流與其組成,以及搜索太空中反物質與暗物質的存在,其 目的在於探討基本物理與宇宙起源之問題。
初級宇宙射線的分析為實驗中重要的一環。初級宇宙射線為總量最 多的宇宙射線,如質子、氦、氧、碳等元素,其光譜揭示了宇宙射線 的加速和傳播過程。
這份分析結果利用反物質磁譜儀精確測量宇宙中的碳元素通量,在 絕對剛度區間1.9GV至2.6TV,並從2012年9月28日至2017年8月8日期間 收集5年83萬筆數據。
摘要(英) The Alpha Magnetic Spectrometer (AMS-02) is a particle detector which is operated on the International Space Station (ISS). It’s for precisely measuring the cosmic ray composition and flux, and searching for anti- matter and dark matter. AMS-02 aims at helping answer fundamental questions and the origin of universe.
The primary cosmic ray, which are protons and heavier nuclei, like He- lium, Oxygen, and Carbon, is among the most abundant nuclei in cosmic rays. Their spectra carry information about the cosmic ray propagation.
This analysis discussed a measurement of the carbon flux with the absolute rigidity range from 1.9 GV to 2.6 TV, which is based on the data collected by AMS on the ISS.
關鍵字(中) ★ 反物質磁譜儀
★ 宇宙射線
★ 碳通量
關鍵字(英)
論文目次 List of Figures
1 Introduction 1
2 Cosmic rays 3
2.1 Anti-matter .......................... 5 2.2 DarkMatter.......................... 6
3 The Alpha Magnetic Spectrometer 7
3.1 AMS-02Detector ....................... 8 3.2 SiliconTracker ........................ 9 3.3 TransitionRadiationdetector ................ 12 3.4 Time-of-Flight......................... 12 3.5 Magnet ............................ 14
3.6 Anti-CoincidentCounters .................. 15
3.7 RingImagingCherenkovDetector. . . . . . . . . . . . . . 16 3.8 ElectromagneticCalorimeter................. 18
4 Carbon Analysis 19
4.1 CutoffRigidity ........................ 20
4.2 DataSampleSelection .................... 23
4.3 ChargeSelectionEfficiency.................. 25
4.3.1 Reconstructed Tracker Efficiency . . . . . . . . . . 26 4.3.2 ReconstructedToFEfficiency . . . . . . . . . . . . 29 4.3.3 Contamination After Charge Selection . . . . . . . 30
4.4 FluxDetermination...................... 33 4.4.1 ExposureTime .................... 33 4.4.2 Acceptance ...................... 34 4.4.3 TriggerEfficiency................... 37
4.5 DataCorrections ....................... 39 4.5.1 Effective Acceptance Correction . . . . . . . . . . . 40 4.5.2 BackgroundSubtraction ............... 42 4.5.3 Unfolding ....................... 44
4.6 CarbonFluxResult...................... 49
5 Conclusion 51 Bibliography 53
參考文獻 [1] M. Aguilar et. al. Observation of the identical rigidity dependence of he, c, and o cosmic rays at high rigidities by the alpha magnetic spectrometer on the international space station. Phys. Rev. Lett., 119:251101, Dec 2017.
[2] William Hanlon. The energy spectrum of ultra high energy cosmic rays measured by the high resolution fly’s eye observatory in stereoscopic mode. 06 2008.
[3] K Nakamura and. Review of particle physics. Journal of Physics G: Nuclear and Particle Physics, 37(7A):075021, jul 2010.
[4] Helen Quinn and Helen R. The symmetry, or lack of it, between matter and antimatter. International Journal of Modern Physics A, 17, 01 2002.
[5] Jorge Casaus. The AMS-02 experiment on the ISS. Journal of Physics: Confer- ence Series, 171:012045, jun 2009.
[6] Nicolò Masi. The AMS-02 Experiment and the Dark Matter Search. PhD thesis, alma, Marzo 2013.
[7] P Sommers and S Westerhoff. Cosmic ray astronomy. New Journal of Physics, 11(5):055004, may 2009.
[8] M. Aguilar et. al. Precision measurement of the helium flux in primary cosmic rays of rigidities 1.9 gv to 3 tv with the alpha magnetic spectrometer on the international space station. Phys. Rev. Lett., 115:211101, Nov 2015.
[9] D.F. Smart and M.A. Shea. A review of geomagnetic cutoff rigidities for earth- orbiting spacecraft. Advances in Space Research, 36(10):2012 – 2020, 2005. Solar Wind-Magnetosphere-Ionosphere Dynamics and Radiation Models.
[10] G. Ambrosi et al. Alignment of the AMS-02 silicon Tracker. In 33rd International Cosmic Ray Conference, page 1260, 2013.
[11] A. Basili, Veronica Bindi, Diego Casadei, Guido Castellini, A. Contin, Andrei Kounine, M. Lolli, Francesco Palmonari, and L. Quadrani. The tof-acc flight
67
electronics for the fast trigger and time of flight of the ams-02 cosmic ray spec- trometer. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 707:99–113, 04 2013.
[12] M. Aguilar et. al. Precision measurement of the boron to carbon flux ratio in cosmic rays from 1.9 gv to 2.6 tv with the alpha magnetic spectrometer on the international space station. Phys. Rev. Lett., 117:231102, Nov 2016.
[13] M. Aguilar et. al. Precision measurement of the proton flux in primary cosmic rays from rigidity 1 gv to 1.8 tv with the alpha magnetic spectrometer on the international space station. Phys. Rev. Lett., 114:171103, Apr 2015.
指導教授 張元翰(Yuan-Hann Chang) 審核日期 2020-8-24
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