Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Taekyun Ha"'
Autor:
Myunghun Kim, Keumhyun Kim, Jungsoo Hong, Hyegoo Lee, Youngil Moon, Won Chan Lee, Sehyun Kim, Taekyun Ha, Jae-Yoon Sim, Moonjoo Lee
Publikováno v:
AIP Advances, Vol 12, Iss 11, Pp 115006-115006-8 (2022)
We describe a complete development process of a segmented-blade linear ion trap. An alumina substrate is characterized with an x-ray diffraction and loss-tangent measurement. The blade is laser-micromachined and polished, followed by sputtering and g
Externí odkaz:
https://doaj.org/article/0bcb21aa2f6b4ed292b554d40d6fea87
Publikováno v:
AIP Advances, Vol 12, Iss 3, Pp 035025-035025-9 (2022)
We present a numerical method of calculating the pressure profile of a large ultra-high vacuum (UHV) system using finite-element analysis (FEA) that exploits the continuity of gas flow. In this study, we introduce a modified FEA (MFEA) that excludes
Externí odkaz:
https://doaj.org/article/e16cce96b30443b596ae22411d24a73f
Autor:
Jeonghwan Park, Geonyoung Kim, Garam Hahn, Dongeon Kim, Taekyun Ha, Jeseok Bang, Jaemin Kim, Seunghwan Shin, Seungyong Hahn
Publikováno v:
IEEE Transactions on Applied Superconductivity. 33:1-5
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c63f9cecb1fe4d5de0792c7628693d81
https://doi.org/10.1109/tasc.2023.3262616
https://doi.org/10.1109/tasc.2023.3262616
Autor:
Jeonghwan Park, Jaemin Kim, Garam Hahn, Dongeon Kim, Taekyun Ha, Jeseok Bang, Seungyong Hahn, Seunghwan Shin
Publikováno v:
IEEE Transactions on Applied Superconductivity. 32:1-5
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aba01c200550c777bb6ba4adf1de45e9
https://doi.org/10.1109/tasc.2022.3156974
https://doi.org/10.1109/tasc.2022.3156974
Publikováno v:
Journal of the Korean Physical Society. 79:125-129
This paper describes solutions to calibrate the photon beam from the gradient bending magnet and to minimize the cross-talk between blades in the photon-beam position monitors in beamlines at Pohang Light Source II. The cross-talk was reduced by 99%
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5f40398d29ea2915ffba4e8ad46a2b7
https://doi.org/10.1007/s40042-021-00230-y
https://doi.org/10.1007/s40042-021-00230-y
Publikováno v:
Journal of the Korean Physical Society. 76:301-305
We overview the system design of the Pohang Light Source-II (PLS-II), and demonstrate that synchrotron radiation is the cause of a recent incident that damaged the vacuum components. To preclude further incidents, we designed a system that shuts off
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b86ffd4a65d06c6662b0f0c6347a7c1d
https://doi.org/10.3938/jkps.76.301
https://doi.org/10.3938/jkps.76.301
Publikováno v:
Journal of Vacuum Science & Technology B. 41:014202
The concept of transmission conductance is required to describe phenomena occurring in a tube with wall pumping. This is because the gas flow is not constant along the length of the tube but decreases, which implies that the geometric conductance det
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eec824a76e43473a98c8f7f943d76258
https://doi.org/10.1116/6.0002177
https://doi.org/10.1116/6.0002177
Autor:
Garam Hahn, Moohyun Yoon, Taekyun Ha, Bukuk Oh, Jun Ho Ko, D. E. Kim, K. Jang, Sung-Gyun Shin, J. Lee
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 1021:165941
The Korea fourth-generation storage ring (Korea-4GSR), with 4-GeV beam energy and 58-pm-rad emittance has been designed by the Pohang Accelerator Laboratory. The evaluated brilliance and coherence are approximately 100 times higher in the hard X-ray
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64dbd2959090aa5f91ef7672e07b59ab
https://doi.org/10.1016/j.nima.2021.165941
https://doi.org/10.1016/j.nima.2021.165941
Autor:
Tae-Yeon Lee, Taekyun Ha
Publikováno v:
Web of Science
Ever since the first particle accelerator appeared in the early twentieth century, the vacuum chamber of any accelerator has been made of metals such as stainless steel or aluminum. These metals have not only an advantage of maintaining ultra-high va
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd7f46ebd2e67ceb6dd47b46e3e6e626
https://doi.org/10.1109/ivec.2019.8745363
https://doi.org/10.1109/ivec.2019.8745363
Publikováno v:
Journal of the Korean Physical Society. 69:52-55
We firstly report an experimental visualization of a cycloaddition reaction on RT frozen asymmetric Si dimers. The frozen Si dimers with a local c(4 × 2) order were prepared by pinning flip-flopping Si dimers by using molecules. This RT pristine c(4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d0aef43ef6126e880970a4ab1031273
https://doi.org/10.3938/jkps.69.52
https://doi.org/10.3938/jkps.69.52