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PHENIX Local Polarimetry Analysis
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | 타니다 키요시 | - |
| dc.contributor.author | 김민정 | - |
| dc.date.accessioned | 2017-07-19T09:10:53Z | - |
| dc.date.available | 2017-07-19T09:10:53Z | - |
| dc.date.issued | 2014-08 | - |
| dc.identifier.other | 000000022033 | - |
| dc.identifier.uri | https://hdl.handle.net/10371/131627 | - |
| dc.description | 학위논문 (석사)-- 서울대학교 대학원 : 물리·천문학부, 2014. 8. 타니다 키요시. | - |
| dc.description.abstract | In PHENIX experiment, one of the most important goals is to study proton spin structure through spin asymmetry measurements of various production cross sections from polarized proton-proton collisions. In 2013, we had longitudinally polarized proton-proton collisions. The gluon contribution to the proton Delta G measurement through longitudinal double spin asymmetry A_LL measurement has been done. Since one of the main systematic uncertainty of A_LL comes from transverse component of beam polarization, its measurement is very important. In order to measure transverse component of beam polarization at the collision point in the PHENIX interaction area, a subsystem called local polarimeter is used by using A_N of forward neutron production. It turned out that, transverse component of longitudinally polarized beam during the experiment does not signicantly contribute systematic error in A_LL measurement. | - |
| dc.description.tableofcontents | 1 Introduction 1
1.1 Proton spin puzzle 1.2 G measurement 1.2.1 G extraction from ALL measurement 1.2.2 Recent result at PHENIX 1.2.3 Systematic uncertainty of Delta G measurement 2 RHIC 2.1 Overview 2.2 Polarization 2.3 Beam Position Monitor 3 Principles for PHENIX local polarimetry 12 3.1 AN of forward neutron production 3.1.1 IP12 experiment 3.1.2 Result at PHENIX 3.2 Local polarimetry at PHENIX 4 Measurement 4.1 Denitions of asymmetries 4.1.1 eN | - |
| dc.description.tableofcontents | eLR, and eUD
4.1.2 AEffN, ALR, and AUD 4.2 Measurement procedure 5 Experiment 5.1 Zero Degree Calorimeter and Shower Max Detector 5.1.1 ZDC 5.1.2 SMD 5.2 Beam Beam Councers 5.3 Data taking 6 Data Analysis 6.1 Data samples 6.2 Run QA 6.2.1 Hardware problem 6.3 Calibration 6.3.1 ZDC and SMD Pedestal 6.3.2 Fake pedestal 6.3.3 ZDC gain 6.3.4 SMD gain 6.3.5 Threshold energy for each SMD channel 6.4 Event selection 6.4.1 SMD shower cut 6.4.2 Acceptance cut 6.4.3 Energy cut 6.5 Beam center 6.5.1 Largest eN 6.5.2 Luminosity formula 6.5.3 X,Y distribution 6.5.4 BPM 6.5.5 Overall result 7 Results 7.1 eLR and eUD result 7.2 AEffN , ALR, and AUD results 7.2.1 Polarization result 7.2.2 AEffN of the transverse fill 7.2.3 ALR and AUD of longitudinal fill 7.3 PT/P and PL/P result 7.3.1 Statistical uncertainty 7.3.2 Systematic uncertainty 8 Conclusion and Discussion 8.1 Final results of PT/P and PL/P 8.2 Impact on ALL measurement | - |
| dc.format | application/pdf | - |
| dc.format.extent | 6059116 bytes | - |
| dc.format.medium | application/pdf | - |
| dc.language.iso | en | - |
| dc.publisher | 서울대학교 대학원 | - |
| dc.subject | polarimetry | - |
| dc.subject | forward neutron production | - |
| dc.subject | spin asymmetry | - |
| dc.subject | proton spin | - |
| dc.subject | PHENIX | - |
| dc.subject.ddc | 523 | - |
| dc.title | PHENIX Local Polarimetry Analysis | - |
| dc.type | Thesis | - |
| dc.description.degree | Master | - |
| dc.citation.pages | 68 | - |
| dc.contributor.affiliation | 자연과학대학 물리·천문학부 | - |
| dc.date.awarded | 2014-08 | - |
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