초록 ▼

- 첨단 중성자 소각산란 측정 기반 구축
･편극, 극소각 측정 및 분석 기술 개발
･고분해능 극소각 산란 측정 기반 구축
･스침각 중성자 소각 산란법 개발
･복합/극한 시료 환경 구축 및 In-situ 검출기 성능 향상
- 중성자 산란 이용 나노 기반 연성 물질 측정 기술 개발 및 응용 연구
･SANS 이용 연성물질의 특성 in-situ 측정 및 분석기법 개발
･SANS 이용 기능성 나노 재료구조 in-situ 측정 및 분석기법 개발
･연성물질 기반 기능성 바이오 재료 제조 및 특성

- 첨단 중성자 소각산란 측정 기반 구축
･편극, 극소각 측정 및 분석 기술 개발
･고분해능 극소각 산란 측정 기반 구축
･스침각 중성자 소각 산란법 개발
･복합/극한 시료 환경 구축 및 In-situ 검출기 성능 향상
- 중성자 산란 이용 나노 기반 연성 물질 측정 기술 개발 및 응용 연구
･SANS 이용 연성물질의 특성 in-situ 측정 및 분석기법 개발
･SANS 이용 기능성 나노 재료구조 in-situ 측정 및 분석기법 개발
･연성물질 기반 기능성 바이오 재료 제조 및 특성 연구
･냉중성자 이용 나노 연성 물질 연구 기반 구축
- 벌크 구조물의 물성 평가 기술 개발 및 산업 응용기술개발
･열/가공 물성 열화에 의한 잔류응력 측정 분석 기술 개발
･벌크 구조재 멀티 온도 조절 및 측정 시스템 및 이용 기술 개발
･나노 기공/석출 결함 발생시의 잔류응력 영향 분석 및 측정기술 개발
･미세절단기 (Electro Discharge Machine) 기술 개발
･중성자 회절용 레이저 굴곡 측정기 개발
･미세크랙 결함에 의한 잔류응력 영향분석 및 측정기술 개발
- 중성자 산란을 이용한 친환경 에너지 구조 물성 평가 및 산업 응용기술개발
･중성자/XRD 회절용 in-situ 충/방전 시스템 구축 및 이용 기술개발
･친환경 물질에 대한 MEM 분석 및 이온 거동/분포 특성 연구
･중성자회절기반 복합 구조 변화 측정 장치 구축
･친환경물질의 스핀 정렬과 전도특성 간의 상관 관계 연구
･전극물질 전도 특성 평가 장치 구축
･중성자회절기반 질량 분석기를 이용한 친환경물질의 구조 안전성 평가 연구
- 교환스프링자성계의 경계면 상호작용현상 연구
･교환스프링 자성계 박막 자기 특성 측정
･전이금속계, 희토류계 스프링자석 시스템의 자기구조 평가
- 자성나노입자 표면제어 및 유기박막내 복합체 형성 연구
･유기분자 이용 자성 나노입자 표면 제어 기술 연구
･자성 나노 입자 복합체 형성 연구
- 스핀 동역학 측정 기법 개발
･자성 유/무기 복합 물질 자기 특성, 구조 측정
･자성 유/무기 복합 물질 스핀 동역학 측정 및 해석
- 자성체 무기물 단결정 구조 분석 연구
･무기물 단결정 결정성 평가
･자기적 특성에 대한 원소 도핑 효과 연구
- 차세대 에너지 소자 중성자 영상분석 기술연구
･차세대 에너지 소자, 열 유체 해석 실험 장치 설계 및 제작
- 중성자 다크필드 영상기술 연구
･다크필드 영상용 중성자 실리콘 격자 개발
- 중성자, 엑스선 하이브리드 영상기술 연구
･하이브리드 영상을 위한 중성자 및 X-선 마이크로 영상 시험시설 구축
- 편극 중성자 발생 기술 연구
･중성자 영상용 편극 발생장치 연구개발
- ³He 대체 중성자 검출 기초 기술 연구
･³He 대체 박막형 중성자 검출기술 개발
- 냉 중성자 PGAA/NDP 분석 시스템 확립 및 PGI 측정기반 구축
･즉발감마선 반동시 계수법 개발을 통한 바탕선 저감(1/10)과 TOF PGAA 시스템 개발
･CN-PGAA 시스템의 측정능력을 평가함(B : 0.1 ppm 이하)
･근표면 깊이별 원소분포(Neutron Depth Profile) 시스템의 분광계통 개선
･NDP를 이용한 주요원소에 대한 검출 한계 및 분석능력 평가(깊이분해능 37 nm)
･즉발감마선 영상화 장치 개념 최적 설계를 위한 몬테카를로 전산모사
･즉발감마선 영상화 알고리듬 개발
- 중성자 방사화 분석 복합 응용기술 개발
･냉 중성자 PGAA의 표준물 분석의 정확도 10% 이내
･NAA로 고고학시료중의 주성분 및 희토류 원소 20여종을 분석 가능(정확도 15%)
･국내 석조 문화재의 NAA 분석을 통한 자연과학적 산지 분류기법 확립
･일반인과 치매환자의 혈청성분원소와 혈압, 혈당과의 성관성 평가 수행

(출처 : 보고서 요약서 3p)

Abstract ▼

Ⅳ. Results of the Project
○ Study of the Clean Environments and Nano-functional Materials by Neutron Scattering
Development of measurement and evaluation technique of the polarized small angle neutron scattering for nano magnetic materials and establishment of the extreme small angle neutron s

Ⅳ. Results of the Project
○ Study of the Clean Environments and Nano-functional Materials by Neutron Scattering
Development of measurement and evaluation technique of the polarized small angle neutron scattering for nano magnetic materials and establishment of the extreme small angle neutron scattering(q≤0.0005 Å-1) measurement system were performed. Detailed design of the grazing incident small angle neutron scattering measurement system was carried out. The structure variation of the bulk nano materials using the multi-functional sample environments was studied.
In-situ SANS techniques for soft materials and in-situ measurements and analyses for the phase behavior of soft/carbon based materials mixtures were developed. The phase behavior of functional nanoscale soft materials and the functional biomaterials based on soft materials using neutron scattering were studied. The phase transition of deuterated block copolymer synthesized by polymerization was studied and the 3-dimensional phase transition and the compatibility of deuterated block copolymers was analyzed. The sustained drug delivery system using SANS was studied.
Residual stress measurements in degraded material properties by heat and deformation was performed and measurement methods and control of various temperature conditions were established. Nanostructure (pore/precipitates/crawling) effect on residual stresses was studied. Laser micro-surface measurements for stress analysis and computational simulation analysis were performed. Elasto-plastic deformation analysis under in situ loading based on CPFEM was performed for DP steel, duplex stainless steel and TRIP steel.
In-situ XRD system for charging/discharging studies and the sample environment of HRPD with high temperature oven and gas spectrometer were constructed. Anti-site mixing of olivine structure materials, crystal structure of Na battery materials and Magnetization as functions of temperature of NaFe3(PO4)2(P2O7) and Na3Fe3(PO4)2(P2O7) were studied using neutron powder diffraction.

○ Materials Research by Neutron Magnetic Scattering
Neutron reflectivity measurement was performed on exchange spring magnetic thin films. The exchange spring magnetic thin films were fabricated by using magnetron sputtering methods. Thus made films are the CoFeB soft magnetic layer on top of hard magnetic layers such as FePt or SmCo5. The former has horizontal spin anisotropy while the latter has vertical spin anisotropy in respect to the layer planes. The polarized neutron reflectivity measurement showed that the soft magnetic layer also possess vertical spin components due to the exchange interaction between the layers.
Neutron reflectivity measurement was also applied to the magnetic nanoparticle thin films. The nanoparticles are ferrite nanoparticles coated with PS-b-PAA block copolymer. They are stacked by using the Langmuir-Blodgett technique in turn with polymethylmetacrylate to form a 20 nm thick film. Reflectivity results show the film becomes ferromagnetic below 2 K.
To develop spin dynamics measurement methods, a diverse set of magnetic inorganic-organic hybrid materials such as metal-phenylethylamine group was grown into single crystals. Their structure was analyzed with X-ray diffraction and neutron diffraction methods. In addition, spin wave measurement was carried out on the simple well known model systems such as chromium and yttrium-manganate (YMnO3) and complex hexaferrites such as nickel-tungstenate (NiWO4).
Growing large single crystals is an essential part of neutron scattering. Efforts have been placed to grow inorganic crystals that show magnetic properties such as the high temperature conductor YBCO series. Top seeded melt growth method was employed in the process. Neutron diffraction was used to characterize crystallinity of such grown crystals as a function of the distance between the seed and location.

○ Applied research of advanced neutron imaging optics
Neutron imaging technique and related system have been developed for applying the future energy. The hydrogen fuel cell and two-phase flow pattern at heat exchanger were visualized by developed technique. The spatial and temporal resolution of Neutron Radiogaphy Facilty at HANARO was checked at this study. Double-tube heat exchanger was designed and optimal operation condition was developed. Developed neutron imaging technique was applied to the improvement of hydrogen fuel cell at freezing and thaw.
A neutron grating interferometer which operated with polychromatic neutron beam has been developed at a thermal neutron beam port at HANARO. The alignment and assembly of the system was undertaken systematically and the extraction of data from the transmission image and the dark-field image has been successfully demonstrated.
The imaging detector was fabricated for neutron and X-ray hybrid imaging system using scintillator, high performance CCD camera, and fiber optic plate. A tilted imaging detector using fiber-optic plate coupled CCD detector was developed to improve resolution and sensitivity.
A ³He-based neutron spin filter and spin flipping methods, which are key components for polarized neutron imaging, were developed and studied for their applications in superconductor and magnetic material investigations using polarized neutron imaging. A solenoid and a magneto-static cavity based 3He neutron spin polarizers were designed and fabricated as a neutron spin polarizer, and a Mezei spin flipper and a AFP spin flipping method of the 3He neutron spin polarizer are designed and studied.
To develop the 10B thin film for replacement of ³He for neutron detection, we studied using two methods. The first is study of the conductive 10B thin film fabrication using technology for use in the lithium ion batteries. And the second is study of the B4C thin film fabrication using the Ar sputtering machine.

○ Development of Converged and Integrated Application Technologies using Neutron Activation Analysis
For the development of cold neutron prompt gamma activation analysis technique, a prompt gamma spectroscopy system was implemented and neutron flux (3x10⁸ n/cm²s) and mean wavelength (4.4 Å) of CG2B was measured. Background level was reduced to 1/10 by the development of anti-coincidence counting technique. In addition, a TOF-PGAA system was implemented using ⁶LiF neutron chopper and Al 6061 material and the analytical technique for short lived nuclides is developed.
For the development of analytical technique using neutron depth profile system, energy resolution and detection limit were improved by the reduction of noise of NDP system and of background gamma-rays. Depth resolution of prompt charged particles emitted from ¹⁰B in a Si wafer was evaluated to be 37 nm. An accurate analytical technique for ¹⁰B was developed and the protocol for the analysis of semiconductor and secondary battery was established.
For the development of a prompt gamma-ray imaging instrument, two dimensional simulation using MCNP/GEANT code was executed on the basis of PGI concept using a single detector and PGI technology was realized.
In relation to the development of application technologies using integrated neutron activation analysis, an analytical procedure of the CN-PGAA was established for the certification of reference materials and the accuracy PGAA results was within 10% of relative error. In addition, to perform provenance study of domestic stone cultural heritage, 38 samples were collected and analyzed by NAA and provenance classification technique by natural science was established. For the application study of human health, blood samples were collected from normal person and dementia patients and serum samples were separated from the blood samples and prepared for NAA by freeze-drying. Interesting elements such as Ca, Na, Fe, Se, Zn were analyzed by NAA. Correlation between elements in serum and blood pressure and blood sugar from normal person and dementia patients was evaluated.

(출처 : SUMMARY 12p)

목차 Contents

• 표지 ... 1
• 제 출 문 ... 2
• 보고서 요약서 ... 3
• 요 약 문 ... 6
• SUMMARY ... 11
• CONTENTS ... 17
• 목차 ... 18
• 제 1장 연구개발과제의 개요 ... 19
• 제 1절 연구개발의 목적 및 필요성 ... 19
• 1. 연구개발의 목적 ... 19
• 2. 연구개발의 필요성 ... 19
• 제 2절 연구개발 범위 ... 25
• 제 2장 국내외 기술개발 현황 ... 29
• 제 1절 선진국의 기술개발 현황 및 수준 ... 29
• 제 2절 국내 기술개발 현황 및 수준 ... 33
• 제 3장 연구개발수행 내용 및 결과 ... 39
• 제 4장 목표달성도 및 관련분야에의 기여도 ... 44
• 제 5장 연구개발결과의 활용계획 ... 62
• 제 6장 연구개발과정에서 수집한 해외과학기술정보 ... 68
• 제 7장 참고문헌 ... 69
• 끝페이지 ... 72