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Akademický článek
Construction and Commissioning of PAL-XFEL Facility
Autor: In Soo Ko, Heung-Sik Kang, Hoon Heo, Changbum Kim, Gyujin Kim, Chang-Ki Min, Haeryong Yang, Soung Youl Baek, Hyo-Jin Choi, Geonyeong Mun, Byoung Ryul Park, Young Jin Suh, Dong Cheol Shin, Jinyul Hu, Juho Hong, Seonghoon Jung, Sang-Hee Kim, KwangHoon Kim, Donghyun Na, Soung Soo Park, Yong Jung Park, Young Gyu Jung, Seong Hun Jeong, Hong Gi Lee, Sangbong Lee, Sojeong Lee, Bonggi Oh, Hyung Suck Suh, Jang-Hui Han, Min Ho Kim, Nam-Suk Jung, Young-Chan Kim, Mong-Soo Lee, Bong-Ho Lee, Chi-Won Sung, Ik-Su Mok, Jung-Moo Yang, Yong Woon Parc, Woul-Woo Lee, Chae-Soon Lee, Hocheol Shin, Ji Hwa Kim, Yongsam Kim, Jae Hyuk Lee, Sang-Youn Park, Jangwoo Kim, Jaeku Park, Intae Eom, Seungyu Rah, Sunam Kim, Ki Hyun Nam, Jaehyun Park, Jaehun Park, Sangsoo Kim, Soonnam Kwon, Ran An, Sang Han Park, Kyung Sook Kim, Hyojung Hyun, Seung Nam Kim, Seonghan Kim, Chung-Jong Yu, Bong-Soo Kim, Tai-Hee Kang, Kwang-Woo Kim, Seung-Hwan Kim, Hee-Seock Lee, Heung-Soo Lee, Ki-Hyeon Park, Tae-Yeong Koo, Dong-Eon Kim, Ki Bong Lee
Publikováno v: Applied Sciences, Vol 7, Iss 5, p 479 (2017)
The construction of Pohang Accelerator Laboratory X-ray Free-Electron Laser (PAL-XFEL), a 0.1-nm hard X-ray free-electron laser (FEL) facility based on a 10-GeV S-band linear accelerator (LINAC), is achieved in Pohang, Korea by the end of 2016. The c
Externí odkaz: https://doaj.org/article/b003307e0af84fe78ca106cdf225588a
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Hard X-ray free-electron laser with femtosecond-scale timing jitter
Autor: Woul-Woo Lee, Soung Park, In Soo Ko, Kwang-Woo Kim, Sang-Hee Kim, Su-Nam Kim, Seung Nam Kim, Sang Han Park, Hoon Heo, Seung-Hwan Kim, Soung Youl Baek, Nam-Suk Jung, Sang Soo Kim, Sung-Ju Park, Sojeong Lee, Sunmin Hwang, Jae Hyuk Lee, Young-Chan Kim, Byoung Ryul Park, Inhyuk Nam, Bongsoo Kim, Chang-Ki Min, Tae-Yeong Koo, Hyo-Jin Choi, Jangwoo Kim, Geonyeong Mun, Seong Hun Jeong, Chae-Yong Lim, Heung-Sik Kang, Young Gyu Jung, Donghyun Na, KwangHoon Kim, Young Jin Suh, Jaeku Park, Dong Eon Kim, Hyung Suh, Seonghan Kim, Mong-Soo Lee, Haeryong Yang, Sangbong Lee, Hee-Seock Lee, Tai-Hee Kang, Seonghoon Jung, Dong Cheol Shin, Intae Eom, Juho Hong, Kyung Sook Kim, Ki-Hyeon Park, Min Ho Kim, Hong Gi Lee, Hocheol Shin, Myong-jin Kim, Jung-Moo Yang, Sang-Youn Park, Yongsam Kim, Bong-Ho Lee, Gyujin Kim, Chung-Jong Yu, Chae-Soon Lee, Jang-Hui Han, Jinyul Hu, Bonggi Oh, Chi-Won Sung, Jaehyun Park, Yong Woon Parc, Heung-Soo Lee, Changbum Kim, Soonam Kwon, Ik-Su Mok, Yong Jung Park, HyoJung Hyun, Ji Hwa Kim, Ki Hyun Nam, Seungyu Rah, Jaehun Park
Publikováno v: Nature Photonics. 11:708-713
The hard X-ray free-electron laser at the Pohang Accelerator Laboratory (PAL-XFEL) in the Republic of Korea achieved saturation of a 0.144 nm free-electron laser beam on 27 November 2016, making it the third hard X-ray free-electron laser in the worl
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::80521e309e34d6075abb7e367b87ee96
https://doi.org/10.1038/s41566-017-0029-8
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Machine Performance of PAL-XFEL
Autor: Changbum Kim, Ki-Hyeon Park, Chang-Ki Min, Haeryong Yang, Heung-Sik Kang, Inhyuk Nam, Heung-Soo Lee, Gyujin Kim, Hoon Heo
Publikováno v: Journal of the Korean Physical Society. 73:235-237
The hard XFEL operation procedure established at PAL-XFEL using e-BBA and incorporating undulator radiation spectrum analysis proved to be highly reliable and robust, and essential for the variable-gap undulators. The state-of-the-art design of the e
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::80677a5cbf9a1d20d021bf0f0a1eea3d
https://doi.org/10.3938/jkps.73.235
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A New Driving Method of the Magnetron Power Supply for a Sulfur Plasma Lamp
Autor: Won-Shik Choi, Min-Jae Kim, Il-Woo Jeong, Hyunchul Park, Ki-Hyeon Park
Publikováno v: IEEE Transactions on Industrial Electronics. 63:5416-5424
This paper presents a new driving method for a sulfur plasma lamp in low-power applications. The newly developed magnetron power supply (MPS) is a series-resonance type with a full-bridge topology controlled by the phase shift to track the beam curre
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::854e421f752ebd6c49cfbef3f273f1d7
https://doi.org/10.1109/tie.2016.2565441
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Development of high-stability magnet power supply
Autor: Ki-Hyeon Park, Min-Jae Kim, Wonseok Choi, Hyunchul Park, Il-Woo Jeong, D. E. Kim
Publikováno v: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 822:15-24
A very stable (≤10 ppm) magnet power supply (MPS) is required in an accelerator to achieve acceptable beam dynamics. Many factors affect the stability of an MPS, so design of the MPS requires much attention to noise-reduction schemes and to good pr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cf520c6ce054537a84b8d74d238a61fc
https://doi.org/10.1016/j.nima.2016.03.078
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Optimal Families of Perfect Polyphase Sequences From the Array Structure of Fermat-Quotient Sequences
Autor: Solomon W. Golomb, Dae San Kim, Ki-Hyeon Park, Hong-Yeop Song
Publikováno v: IEEE Transactions on Information Theory. 62:1076-1086
We show that a $p$ -ary polyphase sequence of period $p^{2}$ from the Fermat quotients is perfect. That is, its periodic autocorrelation is zero for all non-trivial phase shifts. We call this Fermat-quotient sequence. We propose a collection of optim
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7e8ba9fa412e2bd7b73cc3cc5aaf568f
https://doi.org/10.1109/tit.2015.2511780
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