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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/57900完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 王名儒(Min-Zu Wang) | |
| dc.contributor.author | Fa-Hui Lin | en |
| dc.contributor.author | 林法慧 | zh_TW |
| dc.date.accessioned | 2021-06-16T07:10:28Z | - |
| dc.date.available | 2014-07-11 | |
| dc.date.copyright | 2014-07-11 | |
| dc.date.issued | 2014 | |
| dc.date.submitted | 2014-07-07 | |
| dc.identifier.citation | [1] SuperKEKB' (Official Webpage), http://www-superkekb.kek.jp/index.
html [2] Belle2' (Official Webpage), http://belle2.kek.jp/ [3] High Energy Accelerator Research Organization (KEK)' (OfficialWebpage), http://accl.kek.jp/introKEKB/ [4] W.S. Hou, H.C. Huang, J.C. Peng, S.K. Sahu, and Y.R. Wang, Conceptual Design of the Extreme Forward Calorimeter', Belle Note 94 (1995). [5] A. Abashian, K. Gotow, N. Morgan, L. Piilonen, S. Schrenk, K. Abe, I. Adachi, J.P. Alexander, et al., The Belle Detector', Nuclear Instruments and Methods in Physics Research A 479 117-232 (2002). [6] S.K. Sahu, W.S. Hou, H.C. Huang, K.C. Peng, K. Ueno, M.Z. Wang, Y.H. Chang, W.T. Lin, C.H. Wang, and R.S. Guo, EFC { A Small Angle BGO Calorimeter for BELLE', Belle Note 203 (1997). [7] M.Z. Wang, Y.H. Chang, W.S. Hou, S. Sahu, and K. Ueno, Review of EFC Options', Belle Note 164 (1996). [8] S.K. Sahu, Role of EFC as a Mask', Belle Note 151 (1996). [9] Saint-Gobain Crystals, BGO Bismuth Germanate Scintillation Material', (2007-08), http://www.detectors.saint-gobain.com [10] S.K. Sahu, K.C. Peng, H.C. Huang, C.H. Wang, Y.H. Chang, W.S. Hou, and K. Ueno, Measurement of Radiation Damage on BGO Crystals', Belle Note 143 (1996). [11] R.R. Akhmetshin, K.L Tsai, R.S. Guo, K. Ueno, C.H. Wang, and M.Z. Wang, Radiation Hardness Tests of the Production BGO crystals for EFC', Belle Note 239 (1998). [12] MITSUBISHI RAYON co. ltd. ESKA Optical Fiber Division, Speci cation Sheet SK-40', DFP0911-15 (2001). [13] HAMAMATSU PHOTONICS K.K. and Electron Tube Center, HAMA- MATSU Multianode Photomultiplier Tube Assembly H7546B', DFP0911- 15 (2003). [14] H.C. Huang, K. Ueno, Y. Chao, R.S. Lu, C.H. Wang, and M.Z. Wang, The Readout System of EFC', Belle Note 377 (2000). [15] Y.S. Velikzhanin et al., Design of a general purpose data collection module for the NuTel telescope', A 552 (2005). [16] Kun-Xian Huang, Front-End Readout System of Neutrino Telescope' (2007). [17] B.C.K. Casey, Measurement of the Number of B B Events in Experiment 5 Data and the B B Cross Section at KEKB.', Belle Note 296, 10 (2000). [18] Z. Dolezal and S. Uno, Belle II Technical Design Report', pages 20{21 (2010). [19] S. Jadach, W. Placzek, and B.F.L. Ward, BHWIDE 1.00: O( ) YFS Expo- nentiated Monte Carlo for Bhabha Scattering at Wide Angles for LEP1/SLC and LEP2', UTHEP-95-1001 (1995). [20] Geant4 Collaboration, Geant4 User's Guide for Application Developers' (2011). [21] W. Placzek, S. Jadach, M. Melles, B.F.L. Ward, and S.A. Yost, Presicion Calculation of Bhabha Scattering at LEP', CERN-TH/99-07, UTHEP-98- 1101 (1999). [22] Bethe Formula', http://en.wikipedia.org/wiki/Bethe_formula [23] J. Beringer, PDG, PR D86, 010001 (2012) and 2013 update for the 2014 edition', page Chap. 31 (2013). [24] Photon and Charged Particle Detectors', http://www.phys.ksu.edu/ personal/cocke/classes/phys506/Photon.htm [25] Landau Distribution', http://en.wikipedia.org/wiki/Landau_ distribution [26] K. Ueno, S.K. Sahu, K.C. Peng, W.S. Hou, and C.H. Wang, Detection of Minimum-Ionizing Particles with BGO and BSO Crystals', Belle Note 147 (1996). [27] Lorentz transformation', http://en.wikipedia.org/wiki/Lorentz_ transformation [28] Normal distribution', http://en.wikipedia.org/wiki/Normal_ distribution | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/57900 | - |
| dc.description.abstract | BGO系統主要是在SuperKEKB加速器的試運轉期間作為粒子反應的亮度監測器。在SuperKEKB加速器中，高速的電子與正子互相碰撞，產生許多Bhabha事件；而在Bhabha事件中所射出的電子和正子，由於動量守恆，在質心座標中具有「背對背」飛行的性質。BGO 系統就是利用此性質，測量在加速器中單位時間內「背對背」事件發生的次數，以計算加速器中粒子反應的亮度。另外，BGO 系統亦可量測到加速器的背景粒子，作為SuperKEKB 加速器的背景強度監測器。
我的研究包含了BGO 偵測器的機械架構設計與電腦模擬。在本論文中，我將介紹BGO 系統整體概括的原理與設計，以及根據電腦模擬對BGO 系統提出預期的效能。 | zh_TW |
| dc.description.abstract | BGO system mainly monitors luminosity of SuperKEKB accelerator during its commissioning. Electrons and positrons collide in SuperKEKB, and many Bhabha events occur, which have a feature of back-to-back outgoing particles. By detecting the back-to-back event rate, the luminosity of SuperKEKB can be obtained. Besides, BGO system can also function as background monitor in SuperKEKB.
My study contains the mechanical design and simulation of BGO system. In this thesis, I introduce the overview design concept and give out an expected performance of BGO system. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-16T07:10:28Z (GMT). No. of bitstreams: 1 ntu-103-R01222013-1.pdf: 3177328 bytes, checksum: 8d637676c3b7d7012018363cb36553dd (MD5) Previous issue date: 2014 | en |
| dc.description.tableofcontents | 1 Introduction 1
1.1 Belle2 Experiment in SuperKEKB . . . . . . . . . . . . . . . . . . . 1 1.2 BEAST2 in Belle2 and BGO System in BEAST2 . . . . . . . . . . 3 1.3 Inheritance from EFC in Belle . . . . . . . . . . . . . . . . . . . . . 4 2 BGO System Apparatus 7 2.1 Overview Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 BGO Crystals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3 Optical Fibers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.4 MAPMT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.5 Pre-Amp and ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.6 FPGA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.7 Computer Software . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3 Working Principle of BGO System 19 3.1 Luminosity Detection . . . . . . . . . . . . . . . . . . . . . . . . . . 19 3.2 Bhabha Scattering . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 3.3 Back-to-back Event Signal Collection . . . . . . . . . . . . . . . . . 22 3.4 Logic Determination of Signals . . . . . . . . . . . . . . . . . . . . . 23 3.5 Proportionality Factors . . . . . . . . . . . . . . . . . . . . . . . . . 24 4 Detector Mechanical Design 27 4.1 BGO Crystal Positioning Design . . . . . . . . . . . . . . . . . . . . 27 4.2 Support Structure Design . . . . . . . . . . . . . . . . . . . . . . . 30 4.2.1 Crystal Holder and Fiber Support Block . . . . . . . . . . . 30 4.2.2 Connection Parts for Background Monitoring . . . . . . . . 32 4.2.3 Connection Parts for Luminosity Monitoring . . . . . . . . . 34 5 BGO Simulation 41 5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 5.2 Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 5.2.1 ParticleGun . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 5.2.2 BHWIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 5.3 Geometry of BGO System . . . . . . . . . . . . . . . . . . . . . . . 44 5.4 Physics Process Simulation . . . . . . . . . . . . . . . . . . . . . . . 45 5.5 Event Counting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 6 Simulation Results 49 6.1 Behaviors of BHWIDE . . . . . . . . . . . . . . . . . . . . . . . . . 49 6.2 Deposit Energy of Electron/Positron in BGO Crystal . . . . . . . . 55 6.3 Deposit Energy of MIP in BGO Crystal . . . . . . . . . . . . . . . 59 6.4 Results of BGO simulation for Luminosity Monitoring . . . . . . . . 65 7 Conclusions 69 A Lorentz Boost 71 B Other Simulation Result Plots 73 B.1 BHWIDE Plots in Lab Frame . . . . . . . . . . . . . . . . . . . . . 73 B.2 Deposit Energy of All Crystals Hit by Electrons . . . . . . . . . . . 75 B.3 Deposit Energy of MIP with Momentum from 0.1 to 10 GeV . . . . 77 C Symmetric versus Asymmetric Design 87 | |
| dc.language.iso | en | |
| dc.subject | 亮度監測 | zh_TW |
| dc.subject | Bhabha事件 | zh_TW |
| dc.subject | BGO | zh_TW |
| dc.subject | BEAST2 | zh_TW |
| dc.subject | SuperKEKB | zh_TW |
| dc.subject | Belle2 | zh_TW |
| dc.subject | Luminosity monitoring | en |
| dc.subject | SuperKEKB | en |
| dc.subject | BEAST2 | en |
| dc.subject | BGO | en |
| dc.subject | Bhabha event | en |
| dc.subject | Belle2 | en |
| dc.title | SuperKEKB試運轉期間之BEAST2偵測器中的BGO背景與光度監測器的設計與模擬 | zh_TW |
| dc.title | Design and Simulation of BGO Background/Luminosity Monitor in BEAST2 for SuperKEKB Commissioning | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 102-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 張寶棣,王正祥,徐靜戈 | |
| dc.subject.keyword | Belle2,SuperKEKB,BEAST2,BGO,Bhabha事件,亮度監測, | zh_TW |
| dc.subject.keyword | Belle2,SuperKEKB,BEAST2,BGO,Bhabha event,Luminosity monitoring, | en |
| dc.relation.page | 93 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2014-07-08 | |
| dc.contributor.author-college | 理學院 | zh_TW |
| dc.contributor.author-dept | 物理研究所 | zh_TW |
| 顯示於系所單位： | 物理學系 | |
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