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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 陳丕燊 | zh_TW |
| dc.contributor.advisor | Pisin Chen | en |
| dc.contributor.author | 黃建中 | zh_TW |
| dc.contributor.author | Jian-Jung Huang | en |
| dc.date.accessioned | 2024-03-17T16:14:03Z | - |
| dc.date.available | 2024-03-18 | - |
| dc.date.copyright | 2024-03-16 | - |
| dc.date.issued | 2024 | - |
| dc.date.submitted | 2024-02-20 | - |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/92224 | - |
| dc.description.abstract | 台灣天文粒子地磁同步輻射電波觀測站（TAROGE）是台灣首個旨在探測由超高能宇宙射線（UHECR）的大氣簇射所引起的脈衝同步輻射電波信號。TAROGE 天線陣列設置於面向太平洋的高山上，使其能進行近地平線觀測。本研究聚焦於 TAROGE-3 站點，旨在展示其 UHECR 探測能力。通過分析 TAROGE-3數據，我們已成功探測到 UHECR 候選事件。
TAROGE-3陣列包括 12個雙堆疊的對數週期偶極天線（LPDA），工作頻段為180-333 MHz。TAROGE-3 的關鍵組件之一是其觸發系統，該系統利用多頻帶共振技術來抑制熱噪聲和周圍連續波（CW）噪聲。觸發系統採用了現場可編程閘陣列（FPGA），處理信息，決定何時為數據獲取（DAQ）系統發起觸發信號。 為了降低人為背景噪聲，已實施軟件過濾技術來識別 UHECR 候選者。此外，還採用了模板匹配技術來確認 UHECR 候選者。TAROGE-3 自 2018 年 7 月運行至今，五年間的工作週期達到了 0.6。在首年數據收集期間，TAROGE-3 每週大約探測到 0.2 個 UHECR 候選事件。從 2018 年開始的五年運行期間，基於首年數據分析，該站點已探測到 5 個 UHECR 候選事件。此外，通過對 TAROGE-3 數據的持續分析，仍有更多 UHECR 候選事件有待揭示。 | zh_TW |
| dc.description.abstract | The Taiwan Astro-particle Radiowave Observatory for Geo-synchrotron Emissions(TAROGE) is the first experimental project in Taiwan aimed at detecting impulsive Geosynchrotron radio signals induced from extensive air shower by ultra-high energy cosmicrays (UHECR). The TAROGE antenna arrays are placed on high mountains facing thePacific Ocean which enables near-horizon observations. This study focuses on TAROGE3 Station and aims to display its UHECR detection capabilities. We have successfully detected UHECR candidates through the analysis of TAROGE-3 data.
The TAROGE-3 array comprises 12 dual-stacked Logarithmic Periodic Dipole Antennas(LPDA) operating within the passband of 180-333 MHz. One of the critical components of TAROGE-3 is its trigger system, which utilizes a multi-frequency band coincidence technique to suppress thermal noise and ambient continuous wave (CW) noise. The trigger system, implemented with a field programmable gate array (FPGA), that processes coincidence information, determines when to initiate a trigger signal for the data acquisition (DAQ) system. To reduce anthropogenic backgrounds, software filtering techniques have been implemented to identify UHECR candidates. Additionally, a template matching has been employed to provide final confirmation of UHECR candidates. TAROGE-3 has been in operation since July 2018. It achieves a duty cycle of 0.6 over the five-year time span. TAROGE-3 detected approximately 0.2 UHECR candidate per week during the first year of data collection. Over the course of its five-year operation since 2018, the station has detected 5 UHECR candidates based on the analysis of the initial year''s data. Furthermore, there remain additional UHECR candidates to be unveiled through continued analysis of TAROGE-3 data. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2024-03-17T16:14:03Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2024-03-17T16:14:03Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 摘要 i
ABSTRACT ii CONTENTS iv Chapter 1 Introduction 1 1.1 Overview of Cosmic Rays Physics 1 1.1.1 History 2 1.1.2 Origin of Cosmic Ray 4 1.1.3 Detection Techniques of Cosmic Ray 6 1.2 Spectrum of Cosmic rays 9 1.2.1 Features of Cosmic Ray Spectrum 11 1.2.2 Ultra-High-Energy Neutrinos 13 1.3 Extensive Air Shower 16 1.3.1 The Longitudinal Profile of EAS 19 1.3.2 Radio emissions from EAS 22 1.3.3 Simulation of Radio Emission from EAS 24 1.3.4 Radio Detection of EAS 27 1.4 TAROGE experiment 33 1.4.1 TAROGE-3 simulation 35 Chapter 2 TAROGE-3 system 37 2.1 Overall design 37 2.1.1 TAROGE-3 operation 43 2.2 The System Response 46 2.2.1 Effective Height of Antenna 48 2.2.2 Front-end electronics Gain 50 2.2.3 Dual Stacked Antenna 52 2.2.4 Digitizer Gain 54 2.2.5 Overall System Response 55 2.3 Trigger System 56 2.3.1 Temporal Coincidence 60 2.3.2 The dynamic threshold 65 2.3.3 Power detector response 68 2.4 Trigger Efficiency of TAROGE-3 71 2.4.1 Trigger Efficiency Modeling 71 2.4.2 Trigger Efficiency Estimation 72 2.4.3 Verification of Trigger Efficiency Model 73 2.5 Acceptance of TAROGE-3 77 2.5.1 Effective Exposure 80 2.6 The number of UHECR candidates 82 Chapter 3 Cosmic Ray Candidate Searching 84 3.1 CW Filter & Angular Reconstruction 86 3.1.1 CW Filter 86 3.1.2 Angular Reconstruction 87 3.2 Impulsive Noise 90 3.3 UHECR Event Selection 94 3.4 UHECR Candidates 99 3.5 Number of UHECR Candidates 103 3.6 Uncertainty 104 Chapter 4 Conclusion 108 REFERENCE 109 | - |
| dc.language.iso | en | - |
| dc.subject | 大氣簇射 | zh_TW |
| dc.subject | 天線觀測站 | zh_TW |
| dc.subject | 宇宙射線 | zh_TW |
| dc.subject | cosmic ray | en |
| dc.subject | extensive air shower | en |
| dc.subject | radio observatory | en |
| dc.title | 以TAROGE-3天線陣列尋找極高能宇宙射線 | zh_TW |
| dc.title | Searching Ultra-high Cosmic Ray with TAROGE-3 | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 112-1 | - |
| dc.description.degree | 博士 | - |
| dc.contributor.oralexamcommittee | 南智祐;黃明輝;王名儒;劉宗哲 | zh_TW |
| dc.contributor.oralexamcommittee | Jiwoo Nam;Ming-Hway Huang;Min-Zu Wang;Tsung-Che Liu | en |
| dc.subject.keyword | 宇宙射線,大氣簇射,天線觀測站, | zh_TW |
| dc.subject.keyword | cosmic ray,extensive air shower,radio observatory, | en |
| dc.relation.page | 120 | - |
| dc.identifier.doi | 10.6342/NTU202400744 | - |
| dc.rights.note | 未授權 | - |
| dc.date.accepted | 2024-02-21 | - |
| dc.contributor.author-college | 理學院 | - |
| dc.contributor.author-dept | 物理學系 | - |
| 顯示於系所單位： | 物理學系 | |
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