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Development of PAL-XFEL Undulator System
김동언,정영규,이월우,박기현,이상봉,오봉기,정성훈,이홍기,서형석,강흥식,고인수,Joachim Pflueger 한국물리학회 2017 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.71 No.11
Pohang Accelerator Laboratory (PAL) have developed a 0.1 nm SASE based FEL based on 10 GeV S-band linear accelerator named PAL-XFEL. At the first stage, PAL-XFEL needs two undulator lines for photon source. The hard X-ray undulator line requires 20 units of 5 m long hybrid-type conventional planar undulator and soft X-ray line requires 7 units of 5 m long hybrid type planar undulators. PAL have developed undulator magnetic structure based on EU-XFEL concepts. In this report, the impact of the background field, alignment issues, the results of pole height tuning, and final magnetic measurement results are summarized.
Magnetic Block Measurement for Insertion Devices in the PAL
박기현,강봉구,정진화,김동언,이홍기,한홍식,서형석,이월우,정영규 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.4
Insertion devices (IDs) for the Pohang Light Source (PLS) have been developed and installed into the storage ring to produce higher photon energies. The IDs were fabricated using many Nd-Fe-B permanent magnetic blocks as the source of the magnetic field. The magnetic field characteristics of the IDs heavily depend on the directional uniformity of the magnetization of block sets. This paper describes the Helmholtz coil system (HCS) for measuring the magnetic moments of the blocks, the sorting procedures for the blocks, and the results of block measurements for the U6 undulator.消
Small-angle X-ray Scattering Beamline BL4C SAXS at Pohang Light Source II
김광우,김제한,윤영덕,안형주,민병석,김나형,나승유,김효윤,이채순,서인득,이월우,최형주,진경식 한국구조생물학회 2017 Biodesign Vol.5 No.1
BL4C SAXS at the Pohang Light Source II is a small-angle X-ray scattering beamline based on an in-vacuum undulatorinsertion device, Si(111) DCM, and toroidal focusing mirror. The beamline normally provides high-flux synchrotron radiationX-ray sources with energies from 10.3 to 20.6 keV and a 100 μm (vertical) × 300 μm (horizontal) full width at half-maximumfocal spot. The analysis of the SAXS data would be facilitated by means of useful ancillary equipment. The design of thebeamline, the key components, and its role are described.
750-kW풍력발전기 개발을 위한 모의시험 장치의 시험
권세진(Kwon, Seijin),손윤규(Son, Yoon-Gyu),서재학(Suh, Jae-Hak),이월우(Lee, Woul-Woo),장성덕(Jang, Sung-Duk),오종석(Oh, Jong-Seok),황진수(Whang, Jin-Su),강신일(Kang, Sin-Il),권오정(Kwon, O-Jung),정진화(Chung, Chin-Wha),한경섭(Han, Ky 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
풍력을 이용한 풍력발전기의 전력변환 시스템을 개발하기 위해서는 바람의 특성을 정확히 분석하고 이를 대치할 수 있는 모의시험 장치인 시뮬레이터가 필수적이다. 모의시험 장치는 풍향 풍속등의 인자들을 입력받아 회전자 블레이드의 토오크를 전동기가 대신해서 발전기에 공급하게 된다 본 논문에서는 풍력발전 모의시험 장치를 이용하여 750-kW gearless형 풍력발전기의 축소모델인 20-kW 모델 발전기와 고효율의 전력변환 장치 설계 및 인버터 특성을 위한 시험용 지그에서의 시험한 결과를 보이고자 한다.