Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Ji-Gwang Hwang"'
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-11 (2022)
Abstract Ultrafast electron diffraction techniques that employ relativistic electrons as a probe have been in the spotlight as a key technology for visualizing structural dynamics which take place on a time scale of a few femtoseconds to hundreds fem
Externí odkaz:
https://doaj.org/article/0d87a31a71f14c4688fe512b0bdcbe9c
Publikováno v:
Communications Physics, Vol 4, Iss 1, Pp 1-8 (2021)
Before laser-driven accelerators can reach broad application, their performance must be ensured by robust characterization. Here, an interferometric method allowing high-resolution measurement of the beam size is demonstrated.
Externí odkaz:
https://doaj.org/article/bc8190a918e04ed2b337714978ba1a3c
Publikováno v:
Communications Physics, Vol 4, Iss 1, Pp 1-8 (2021)
Plasma-based accelerators are on the brink of a development stage, where applications of the beam for medical sciences, imaging, or as an injector for a future large-scale accelerator-driven light source become feasible. The requirements on electron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa9b6fbdc6722ecafc94f20c1791786f
https://doaj.org/article/bc8190a918e04ed2b337714978ba1a3c
https://doaj.org/article/bc8190a918e04ed2b337714978ba1a3c
Publikováno v:
The Review of scientific instruments. 92(12)
We demonstrate an experimental methodology for measuring the halo distribution of special bunches in a storage ring using a synchrotronradiation coronagraph composed of the objective lens and a re diffraction system. The optimum parameters for the co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::669621afbe35b08bdd533e41a17b689e
https://pubmed.ncbi.nlm.nih.gov/34972463
https://pubmed.ncbi.nlm.nih.gov/34972463
Autor:
Ji-Gwang Hwang, Sang-Youl Lee
Publikováno v:
Nanotechnology Reviews, Vol 8, Iss 1, Pp 444-451 (2019)
This study dealt with geometrically nonlinear transient behaviors of carbon nanotube/fiber/polymer composite (CNTFPC) spherical shells containing a central cutout. A multiscale analysis using the Hewitt and Malherbe model was performed to determine t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bcfb348c7791fae3f7e9a14c2f7379a
https://doi.org/10.1515/ntrev-2019-0039
https://doi.org/10.1515/ntrev-2019-0039
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 940:387-392
The pulse picking by resonant excitation (PPRE) method is applied at BESSY II to provide single bunch light to timing users while operating a multi-bunch filling pattern. This method can provide single bunch light to all beamlines simultaneously sinc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::635eeaffb7706b99ffd9a2a7887abdb6
https://doi.org/10.1016/j.nima.2019.06.053
https://doi.org/10.1016/j.nima.2019.06.053
The upgrade of the BESSY II light source in Berlin towards a variable pulse-length storage-ring will lead to a complex bunch-filling pattern. This may involve co-existing electron bunches with significant variations of their properties. Among many ot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ad398100d34b25f87475cb98dbd24b03
http://www.helmholtz-berlin.de/pubbin/oai_publication?VT=1&ID=102837
http://www.helmholtz-berlin.de/pubbin/oai_publication?VT=1&ID=102837
A pepper-pot diagnostic device was developed to accurately and robustly retrieve particle distribution in horizontal and vertical phase spaces by single-shot emittance measurements. Two masks that differ in both composition and manufacturing method w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d45c5ae63f0ea58d6b0843a78a0fd80
http://www.helmholtz-berlin.de/pubbin/oai_publication?VT=1&ID=104175
http://www.helmholtz-berlin.de/pubbin/oai_publication?VT=1&ID=104175
Autor:
Gregor Schiwietz, G. Klemz, Markus Ries, Andreas Jankowiak, Roland Müller, Paul Goslawski, Michael Abo-Bakr, Terry Atkinson, Andreas Schälicke, Ji-Gwang Hwang
Publikováno v:
Scientific Reports, Vol 10, Iss 1, Pp 1-7 (2020)
Scientific Reports
Scientific Reports
Temporally short X-ray pulses are an indispensable tool for the study of electron transitions close to the Fermi energy and structural changes in molecules undergoing chemical reactions which take place on a time-scale of hundreds of femtoseconds. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1c0961d472d75ad56ec2c13b5f50aea
https://doi.org/10.1038/s41598-020-67027-0
https://doi.org/10.1038/s41598-020-67027-0
Publikováno v:
Scientific Reports
Scientific Reports, Vol 10, Iss 1, Pp 1-10 (2020)
Scientific Reports, Vol 10, Iss 1, Pp 1-10 (2020)
We demonstrate an experimental methodology for measuring the temporal distribution of pico-second level electron bunch with low energy using radial electric and azimuthal magnetic fields of an accelerating ($$\hbox {TM}_{01}$$ TM 01 mode) radio frequ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6f39bc6c4767f41e966a383d6f874c7d
http://www.helmholtz-berlin.de/pubbin/oai_publication?VT=1&ID=102149
http://www.helmholtz-berlin.de/pubbin/oai_publication?VT=1&ID=102149