Peer-reviewed Journal Publications (SCIE/Scopus, * denotes corresponding author and † represents the first author)
36. Yumi Lee†, Seong Hee Park, Ji‑Gwang Hwang*, Jaehyun Kim, Hyunchang Jin, “Eddy current effect in a booster ring of Korea-4GSR”, Nuclear Inst. and Methods in Physics Research A 1082, 171072(2026).
35. Ji-Gwang Hwang†*, G. Schiwietz, M. Ries, V. Duerr, D. Wolk, A. Schaelicke, T. Atkinson, G. Rehm, “A low-ringing, high-bandwidth button beam position monitor for bunch-by-bunch diagnostics in advanced storage ring operations”, Review of Scientific Instruments 96, 113301 (2025).
34. Eunkyoung Shin†, Ji‑Gwang Hwang*, Bonghyuk Choi, Hyunchang Jin, Seunghwan Shin , “Beam dynamics study for RF tolerance estimation in Korea‑4GSR”, Journal of the Korean Physical Society, (2025).
33. Ki Moon Nam, Ji-Gwang Hwang, Young Dae Yoon† , and Yong Woon Parc† , “Revised Hamiltonian near third-integer resonance and implications for an electron storage ring”, Phyical Review Accelerators and Beams 27, 044001 (2024).
32. Yumi Lee, Eun-San Kim† , Ji-Gwang Hwang † , Jaeyu Lee, Jaehyun Kim, “Beam dynamics in the booster synchrotron of Korea-4GSR project”, Nuclear Instruments and Methods in Physics Research A 1060, 169074 (2024).
31. Garam Hahn, Woojin Song, Yong-Seok Lee, Young-Do Joo, Ji-Gwang Hwang † , “Wideband Diagnostics for Online Measurement of Temporal Information of Beams in a Storage Ring”, IEEE Transactions on Instrumentation and Measurements 73, 6500706 (2023).
30. B. Alberdi Esuain† *, Ji-Gwang Hwang † , A. Neumann, and T. Kamps, “Novel approach to push the limit of temporal resolution in ultrafast electron diffraction accelerators”, Scientific Reports 12, 13365 (2022).
29. Ji-Gwang Hwang† *, G. Schiwitz*, P. Goslawski, and M. Ries, “Beam halo measurements for special bunches in a storage ring by using a coronagraph”, Review of Scientific Instruments 92, 123302 (2021).
28. Ji-Gwang Hwang† *, K. Albrecht, A. Hoehl, B. Alberdi Esuain, and T. Kamps, “Monitoring the size of low-intensity beams at plasma-wakefield accelerators using high-resolution interferometry”, Communications Physics 4, 214 (2021).
27. G. Hahn† *, T.-K. Yang, H. J. You, and Ji-Gwang Hwang*, “Design and Experimental Validation of High-resolution Single-shot Emittance Diagnostics for Heavy-ion Beams”, IEEE Transactions on Instrumentation and Measurements 70, 5015507 (2021).
26. G. Schiwietz† *, Ji-Gwang Hwang, A. Jankowiak, M. Koopmans, and M. Ries, “Bunch-resolved diagnostics for a future electron-storage ring”, Nuclear Instruments and Methods in Physics Research A 990, 164992 (2021).
25. Ji-Gwang Hwang† , Tsukasa Miyajima*, Yosuke Honda, and Eun-San Kim*, “Measurement of Bunch Length and Temporal Distribution Using Accelerating Radio Frequency Cavity in Low-emittance Injector”, Scientific Report 10, 18905 (2020).
24. Ji-Gwang Hwang† *, Michael Abo-Bakr, Aleksandr Matveenko, Georgios Kourkafas, and Thorsten Kamps, “Radiation generation with an existing demonstrator of energy-recovery Continuous-Wave Superconducting RF accelerator”, Journal of the Korean Physical Society 77, 337 (2020).
23. Ji-Gwang Hwang† *, G. Schiwietz, M. Abo-Bakr, T. Atkinson, M. Ries, P. Goslawski, G. Klemz, R. Müller, A. Schälicke, and A. Jankowiak, “Generation of intense and coherent sub-femtosecond X-ray pulses in electron storage rings”, Scientific Reports 10, 10093 (2020).
22. Ji-Gwang Hwang† *, Marten Koopmans, Markus Ries, Andreas Schälicke, and Roland Müller, “Analytical and numerical analysis of longitudinally coupled transverse dynamics of Pulse Picking by Resonant Excitation in storage rings serving timing and high-flux users simultaneously”, Nuclear Instruments and Methods in Physics Research A 940, 387 (2019).
21. G. Schiwietz† *, Ji-Gwang Hwang, M. Koopmans, M. Ries, and A. Schaelicke, “Development of the Electron-Beam Diagnostics for the Future BESSY-VSR Storage Ring”, IOP Conf. Series : Journal of Physics : Conf. Series 1067, 072005 (2018).
20. Ji-Gwang Hwang† * and E.-S. Kim*, “Generation of femtosecond extreme ultraviolet pulses using low-energy electron beams for a pump-probe experiment”, Nuclear Instruments and Methods in Physics Research A 906, 159 (2018).
19. S.W. Jang† , E.-S. Kim*, A. Heo, Y. Honda, T. Tauchi, N. Terunuma, and Ji-Gwang Hwang, “Development of a low-Q cavity-type beam position monitoring system”, IEEE TRANSACTIONS ON NUCLEAR SCIENCE 64, 2353 (2017).
18. Ji-Gwang Hwang† *, Tae-Keun Yang, Peter Forck, Seon Yeong Noh, Garam Hahn, and Minkyoo Choi, “Development of high resolution linear-cut beam position monitor for heavy-ion synchrotron of KHIMA project”, Nuclear Instruments and Methods in Physics Research A 853, 33 (2017).
17. Ji-Gwang Hwang† *, Tae-Keun Yang, and Peter Forck, “High precision capacitive beam phase probe for KHIMA project”, Nuclear Instruments and Methods in Physics Research A 837, 34 (2016).
16. Ji-Gwang Hwang† , Eun-San Kim*, Changbum Kim, Jung-Yun Huang, and Dotae Kim, “Effects of mirror distortion by thermal deformation in an interferometry beam size monitor system at PLS-II”, Nuclear Instruments and Methods in Physics Research A 833, 156 (2016).
15. Ji-Gwang Hwang† , Eun-San Kim*, Hye-Jin Kim, Hyojae Jang, Hyung-Jin Kim, and Dong-O Jeon, “Beam dynamics for high-power superconducting heavy-ion linear accelerator of RAON”, IEEE Transactions on Nuclear Science 63, 992 (2016).
14. Ji-Gwang Hwang† , Eun-San Kim*, and Kichiji Hatanaka, “A design study for a compact two stage in-flight separator with a high mass resolution and large acceptance”, Review of Scientific Instruments 86, 033106 (2015).
13. Seon Yeong Noh† , Eun-San Kim*, Ji-Gwang Hwang, et. al., “Development of an S-band cavity-type beam position monitor for a high power THz free-electron laser”, Review of Scientific Instruments 86, 014703 (2015).
12. Eun-San Kim† *, JungBae Bahng, Ji-Gwang Hwang, et. al., “Start-to-end simulations for beam dynamics in the RISP heavy-ion accelerator”, Nuclear Instruments and Methods in Physics Research A 794, 215 (2015).
11. Ji-Gwang Hwang† , Eun-san Kim*, Hye-Jin Kim, and Dong-O Jeon, “Minimization of the emittance growth of multi-charge particle beams in the charge stripping section of RAON”, Nuclear Instruments and Methods in Physics Research A 767, 153 (2014).
10. Ji-Gwang Hwang† , Eun-San Kim*, Tsukasa Miyajima*, et. al., “Analysis on effects of transverse electric field in an injector cavity of compact-ERL at KEK”, Nuclear Instruments and Methods in Physics Research A 753, 97 (2014).
9. D. Jeon† *, I. S. Hong, H. J. Kim, Ji-Gwang Hwang, et. al., “Design of RAON Accelerator System”, Journal of the Korean Physical Society 65, 1010 (2014).
8. Hye-Jin Kim† *, B. H. Choi, Eun-San Kim, Ji-Gwang Hwang, “Design of Medium Energy Beam Transport for the Rare Isotope Science Project”, Journal of the Korean Physical Society 63, 1249 (2013).
7. Hye-Jin Kim† , Hyung-Jin Kim, Dong-O Jeon, Ji-Gwang Hwang*, Eun-San Kim*, “Mirror symmetric optics design for charge-stripping section in Rare Isotope Science Project”, Nuclear Instruments and Methods in Physics Research B 317, 266 (2013).
6. Ji-Gwang Hwang† , Eun-San Kim*, and Kichiji Hatanaka, “Design study of an in-flight projectile fragment separator for rare isotope beams”, Current Applied Physics 13, 189 (2013).
5. Ji-Gwang Hwang† , Eun-San Kim*, and Tsukasa Miyajima, “Effects of space charge in a compact superconducting energy recovery linac with a low energy linac with a low energy”, Nuclear Instruments and Methods in Physics Research A 684, 18 (2012).
4. Eun-San Kim† *, Ji-Gwang Hwang, and Moohyun Yoon, “Parameter Optimizations and Performances for the Low-Charge Beams in PAL Free-Electron Laser”, IEEE Transactions on Nuclear Science 58, 2000 (2011).
3. Jin-Yeong Ryu† , Eun-San Kim*, Ji-Gwang Hwang, et. al., “Beam-size Measurements by Using a Synchrotron Radiation Interferometer”, Journal of the Korean Physical Society 58, 25 (2011).
2. Changbum Kim† , Ilmoon Hwang*, Jin-Yeong Ryu, Ji-Gwang Hwang, et. al., “Two-dimensional SR Interferometer for PLS-II”, Journal of the Korean Physical Society 58, 725 (2011).
1. Su-Youn Lee† , Ji-Gwang Hwang, and Eun-San Kim*, “Effects of the Resistive Wall Impedance in the PLS-II Storage Ring”, Journal of the Korean Physical Society 56, 1957 (2010).