Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Myung Hoon Cho"'
Autor:
Gyujin Kim, Haeryong Yang, Chi Hyun Shim, Inhyuk Nam, Myung Hoon Cho, Hoon Heo, Changbum Kim, Chang-Ki Min, Heung-Sik Kang
Publikováno v:
Photonics, Vol 9, Iss 6, p 418 (2022)
Variable gap undulator widely used in X-ray free-electron laser (XFEL) enables the photon energy scan by changing its gap. A phase-shifter should be incorporated to compensate for the phase mismatch between the electron bunches and X-ray pulses arisi
Externí odkaz:
https://doaj.org/article/2c4cd54c9a6542b788e708cbb5d967af
Autor:
Intae Eom, Sae Hwan Chun, Jae Hyuk Lee, Daewoong Nam, Rory Ma, Jaehyun Park, Sehan Park, Sang Han Park, Haeryong Yang, Inhyuk Nam, Myung Hoon Cho, Chi Hyun Shim, Gyujin Kim, Chang-Ki Min, Hoon Heo, Heung-Sik Kang, Changbum Kim
Publikováno v:
Applied Sciences, Vol 12, Iss 3, p 1010 (2022)
The X-ray free-electron laser of the Pohang Accelerator Laboratory (PAL-XFEL) was opened to users in 2017. Since then, significant progress has been made in PAL-XFEL operation and beamline experiments. This includes increasing the FEL pulse energy, i
Externí odkaz:
https://doaj.org/article/bb611734d6be4c53bb565457febe3791
Autor:
Bobbili Sanyasi Rao, Myung Hoon Cho, Hyung Taek Kim, Jung Hun Shin, Kyung Hwan Oh, Jong Ho Jeon, Byung Ju Yoo, Seong Ha Cho, Jin Woo Yoon, Jae Hee Sung, Seong Ku Lee, Chang Hee Nam
Publikováno v:
Physical Review Research, Vol 2, Iss 4, p 043319 (2020)
Laser wakefield accelerators rely on relativistically moving micrometer-sized plasma cavities that provide extremely high electric field >100 GV/m. Here, we demonstrate transverse shaping of the plasma cavity to produce controlled sub-GeV electron be
Externí odkaz:
https://doaj.org/article/5f37b417223c480684bb59cadd84eb6b
Publikováno v:
Physical Review Accelerators and Beams, Vol 23, Iss 9, p 090702 (2020)
This paper presents a method that uses a gap scan of the phase shifter to optimize the intensity of a free-electron laser (FEL) by matching its phase with that of the electron beam. Phase shifters are essential instruments, especially for a long undu
Externí odkaz:
https://doaj.org/article/b59e7598585746c69777e01f9fcd4281
Autor:
Sang Jae Lee, Intae Eom, Chang-Ki Min, Bonggi Oh, Jae Hyuk Lee, Gyujin Kim, Heung-Sik Kang, Inhyuk Nam, Myung Hoon Cho, Sergey Terentyev, Seungyu Rah, Gisu Park, Sehan Park, Kyung Sook Kim, Jae Hyun Park, Min-Jae Kim, Haeryong Yang, Sae Hwan Chun, Seonghan Kim, Vladimir Blank, Deming Shu, Changbum Kim, Chi Hyun Shim, Donghyun Na, Jun Ho Ko, Young Jin Suh, Yuri Shvyd'ko, Hoon Heo, Jangwoo Kim, HyoJung Hyun, Kwang-Je Kim
Publikováno v:
Nature Photonics. 15:435-441
A self-seeded X-ray free-electron laser (XFEL) is a promising approach to realize bright, fully coherent free-electron laser (FEL) sources in the hard X-ray domain that have been a long-standing issue with longitudinal coherence remaining challenging
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50bc030de168eba67d5ca7f5027e98e6
https://doi.org/10.1038/s41566-021-00777-z
https://doi.org/10.1038/s41566-021-00777-z
Autor:
Ho Sung Kim, Ji Hye Ku, Soo Hyung Kim, Myung Hoon Cho, Ji Hoon Kim, Jung Keun Cha, Hyung Woo Lee, Jong-Man Kim
Publikováno v:
Advanced Powder Technology. 31:1023-1031
We investigated the effects of different metal oxide (MO) nanoparticles (e.g., CuO, KIO4, Fe2O3) on the combustion and gas-generating characteristics of sodium azide microparticle (NaN3 MP; gas-generating agent) and aluminum nanoparticle (Al NP; heat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75fe804b3ffe7ab597658a07d5f4c288
https://doi.org/10.1016/j.apt.2019.12.034
https://doi.org/10.1016/j.apt.2019.12.034
Autor:
Sihyeon Lee, Seong-hoon Kwon, Inhyuk Nam, Myung-Hoon Cho, Dogeun Jang, Hyyong Suk, Minseok Kim
Publikováno v:
Applied Sciences; Volume 13; Issue 4; Pages: 2564
We report on the development of a compact, gas-filled capillary plasma source for plasma accelerator applications. The one-body sapphire capillary was created through a diamond machining technique, which enabled a straightforward and efficient manufa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c51e9d463dad0facda0d56b0d4f13b3
https://doi.org/10.3390/app13042564
https://doi.org/10.3390/app13042564
Publikováno v:
Journal of Industrial and Engineering Chemistry. 78:84-89
Herein, the roles of an Al/Fe2O3 energetic composites as a heat energy source and a bonding medium for interfacially bonding dissimilar Al/Cu metallic substrates are systematically investigated. Energetic material (EM)/solder material (SM) bilayer pe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84dcdda8de2cb9e99da27e8a7b0c8981
https://doi.org/10.1016/j.jiec.2019.06.041
https://doi.org/10.1016/j.jiec.2019.06.041
Autor:
Hyung Taek Kim, Chang Hee Nam, Yong Ha Jang, Seongha Cho, Constantin Aniculaesei, Myung Hoon Cho, Jong Ho Jeon, Calin Ioan Hojbota, Bjorn Hegelich, Jae Hee Sung, Byung Ju Yoo, Jung Hun Shin, Seong Ku Lee, Enrico Brunetti, Kyung Hwan Oh, Vishwa Bandhu Pathak
Publikováno v:
Scientific Reports, Vol 9, Iss 1, Pp 1-7 (2019)
Scientific Reports
Scientific Reports
The phase velocity of the wakefield of a laser wakefield accelerator can, theoretically, be manipulated by shaping the longitudinal plasma density profile, thus controlling the parameters of the generated electron beam. We present an experimental met
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4aad27163c91029da4e6298dc53b2dd
http://link.springer.com/article/10.1038/s41598-019-47677-5
http://link.springer.com/article/10.1038/s41598-019-47677-5
Publikováno v:
Chemical Physics Letters. 715:134-140
In this work, we fabricated crystallite solid and porous TiO2 nanoparticles (NPs) using a surfactant-templated aerosol process. Specifically, Brij-58 surfactant was employed as a template in TiO2 matrix. The porosity of TiO2 NPs was controlled by var
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1150be3d18631edf778b877731cd34c8
https://doi.org/10.1016/j.cplett.2018.11.029
https://doi.org/10.1016/j.cplett.2018.11.029