Go to the top

Intense Beam and Accelerator Laboratory (iBal)
고강도 빔-가속기 연구실

Prof. Moses Chung's Research Group @ UNIST


국내 대형 가속기 소개 동영상:


Several large-scale accelerator facilities are operational or under construction in Korea, such as the Korea Multi-purpose Accelerator Complex (KOMAC) in Gyeongju, the 3rd Generation Synchrotron Light Source (PLS-II) and the X-ray Free Electron Laser (PAL-XFEL) in Pohang, the Rare Isotope Science Project (RISP) in Daejeon, and the SNUH Gijang Cancer Center of Heavy Ion Therapy and Study (SGCC-HITS) (plus a new 4th Generation Storage Ring is being planned in Cheongju). By using advanced beam physics models and simulation tools, cutting-edge beam diagnostics, and sophisticated beam manipulation techniques, we aim to optimize and improve the performance of those accelerators. Furthermore, we will try to develop transformational technologies for the next-generation high-intensity accelerators such as the International Fusion Materials Irradiation Facility (IFMIF), Accelerator Driven System (ADS), and Heavy Ion Fusion (HIF). Applications of the accelerators to laboratory astrophysics, cancer therapy (FLASH), and materials research/drug discovery will also be actively pursued.

본 연구실에서는 새로운 빔 물리 모형 및 수치해석 코드, 첨단 빔 진단 및 제어 장치를 활용하여, 국내외에 운영 또는 건설 중인 대형 가속기의 구축, 최적화 및 성능향상에 기여하고, 나아가 지금보다  가속 효율이  10~100 배 높은 첨단 고강도 가속기 개발에 필요한 물리적-기술적 난제에 도전한다. 이러한 첨단 가속기는 핵융합 재료 연구, 핵폐기물 처리, 우주의 신비 탐구, 암 치료, 신소재/신약 개발 등 인류가 당면한 여러 문제를 해결하는 데 필수적인 첨단기술이다.

UNIST Research Groups:
[Ion Traps/Beam Manipulations] 신복균 (Postdoc), 유경훈, 박성남, 한제환
[Beam-Driven Wakefields/Advanced Accelerators] 문국진, 정준영
[High-Intensity Accelerator Physics/Beam Diagnostics] 성창규, 문석호, 곽동현, Emre Cosgun, 김준하

iBal Local: http://ibals.unist.ac.kr

UNIST Physics Department: http://physics.unist.ac.kr

UNIST Physics YouTube Channelhttp://www.youtube.com/channel/UCq0pYF5aaLaOh5s1CI95UaA

UNIST Physics wiki: http://wiki.unist.in/w/물리학과

Center for High Energy Astrophysics (CHEA): http://sirius.unist.ac.kr/SRC-CHEA/index.html

UNIST Faculty Research Profile: http://research.unist.ac.kr/post-research/정모세_고강도-빔-가속기-연구실

Korean Physical Society / Division of Plasma Physics: https://www.kps.or.kr/content/branch/branch_Main.php?eid=c2VxX2lkPTI5NiZ0eXBlPWJyYW5jaA==


Link to a short video clip: 연구실 소개 동영상 (곽동현 제작)


학부생을 위한 연구실 소개:



2014~: Assistant / Associate / Tenured-Associate Professor, Dept. of Physics, Ulsan National Institute of Science and Technology (UNIST)
2012~2014: Peoples Fellow / Associate Scientist, Accelerator Physics Center, Fermi National Accelerator Laboratory (Fermilab)
2010~2012: Assistant Professor, Handong Global University (HGU) at Pohang
2008~2010: Postdoc, Accelerator Physics Center, Fermi National Accelerator Laboratory (Fermilab)
2001~2008: Research Assistant, Princeton Plasma Physics Laboratory (PPPL)



Ph. D. Plasma Physics, Princeton University
– Advisor: Prof. Ronald C. Davidson (Passed away on 19 May 2016)
– Thesis: “Studies of charged particle beam dynamics on the Paul trap simulator experiment pure ion plasma”
M. S. Nuclear Engineering (Nuclear Fusion Major), Seoul National University
– Advisor: Prof. Sang-Hee Hong (Retired)
– Thesis: “Full wave modeling for fast wave current drive simulation in tokamak plasmas”
B. S. Nuclear Engineering, Seoul National University



– Peoples Fellowship from Fermi National Accelerator Laboratory (Outstanding Accelerator Scientists
Early in Their Careers, 2012 – 2014)
– Graduated with Highest Honors in SNU Nuclear Engineering Dept.
– Vice Chair, The Korean Physical Society (KPS) / Division of Plasma Physics (2020 – 2022)
– Editor, AAPPS Bulletin / Accelerator Science (2021 – )
– Committee Member, Asian Committee for Future Accelerators (ACFA) (2021 – 2022)
– Chair, The Korean Physical Society (KPS) / Division of Plasma Physics (2022 – 2024)




Research Interest

Beam physics with intense self-fields and strong coupling
Advanced beam diagnostics and manipulations
Beam-plasma interactions and advanced accelerators (Wakefields/Muon)
Plasma and beam physics using ion and electron traps
High-intensity accelerator R&D for future nuclear applications (Nuclear Data, SNS, IFMIF, ADS, and HIF)


Recent Publications (Selected)

[13] J. Seok, G. Ha, J. Power et al., and M. Chung, “Experimental demonstration of double emittance exchange toward arbitrary longitudinal beam phase-space manipulations”, Physical Review Letters 129, 224801 (2022).
[12] Y.-L. Cheon , S.-H. Moon, M. Chung, and D.-O. Jeon, “Effects of beam spinning on the fourth-order particle resonance of 3D bunched beams in high-intensity linear accelerators”, Physical Review Accelerators and Beams 25, 064002 (2022).
[11] S.-Y. Kim, K. Moon, and M. Chung et al., “Witness electron beam injection using an active plasma lens for a proton beam-driven plasma wakefield accelerator”, Physical Review Accelerators and Beams 24, 121304 (2021).
[10] The MICE Collaboration (including M. Chung), “Demonstration of cooling by the Muon Ionization Cooling Experiment”, Nature 578, 53 (2020).
[9] The AWAKE Collaboration (including M. Chung), “Acceleration of electrons in the plasma wakefield of a proton bunch”, Nature 561, 363 (2018).
[8] M. Chung, H. Qin, R. C. Davidson, L. Groening, and C. Xiao, “Generalized Kapchinskij-Vladimirskij Distribution and Beam Matrix for Phase-Space Manipulations of High-Intensity Beams”, Physical Review Letters 117, 224801 (2016).
[7] L. Groening, M. Maier, C. Xiao, L. Dahl, P. Gerhard, S. Mickat, H. Vormann, M. Vossberg, and M. Chung, “Experimental Proof of Adjustable Single-Knob Ion Beam Emittance Partitioning”, Physical Review Letters 113, 264802 (2014).
[6] S. G. Arutunian, A. E. Avetisyan, M. A. Davtyan, G. S. Harutyunyan, I. E. Vasiniuk, M. Chung, and V. Scarpine, “Large Aperture Vibrating Wire Monitor with Two Mechanically Coupled Wires for Beam Halo Measurements”, Physical Review Accelerators and Beams 17, 032802 (2014).
[5] M. Chung et al., “Pressurized H2 RF Cavities in Ionizing Beams and Magnetic Fields”, Physical Review Letters 111, 184802 (2013).
[4] H. Qin, R. C. Davidson, M. Chung, and J. W. Burby, “Generalized Courant-Snyder Theory for Charged Particle Dynamics in General Focusing Lattices”, Physical Review Letters 111, 104801 (2013).
[3] M. Chung, E. P. Gilson, R. C. Davidson, P. C. Efthimion, and R. Majeski, “Use of a Linear Paul Trap to Study Random-Noise Induced Beam Degradation in High-Intensity Accelerators”, Physical Review Letters 102, 145003 (2009).
[2] H. Qin, M. Chung, and R. C. Davidson, “Generalized Kapchinskij-Vladimirskij Distribution and Envelope Equation for High-Intensity Beams in a Coupled Transverse Focusing Lattice”, Physical Review Letters 103, 224802 (2009).
[1] M. Chung, E. P. Gilson, M. Dorf, R. C. Davidson, P. C. Efthimion, and R. Majeski, “Experiments on Transverse Compression of a Long Charge Bunch in a Linear Paul Trap”, Physical Review Accelerators and Beams 10, 064202 (2007).




Bok-Kyun Shin (with Prof. Dongsu Ryu)

Ph.D Students (including Master-Ph.D-Combined):
Chang-Kyu Sung (UNIST)
Kook-Jine Moon (UNIST)
Kyoung-Hun Yoo (UNIST, now at IBS/RISP)
Sung-Nam Park (UNIST)
Seok-Ho Moon (UNIST)
Dong-Hyun Kwak (UNIST, now at IBS/RISP)
Jun-Yeong Jeong (UNIST, now at PAL)
Emre Cosgun (UNIST)
Jun-Ha Kim (UNIST)
Je-Hwan Han (UNIST)

Master Students: None (Please contact mchung AT unist.ac.kr) 

Undergraduate Interns: None (Please contact mchung AT unist.ac.kr)

Dong-Nyung Choe (Master, now at HANMI Semiconductor)
Chul-Woon Choi (Master, now at SAMSUNG Electronics)
Sandeep Kumar (Postdoc, now Associate Professor at Manav Rachna University, India)
Hyock-Jun Son (Ph.D from Handong Global University, then at IBS/RISP and now at MSU/FRIB)
Seong-Yeol Kim (Ph.D, now at ANL/AWA)
Ji-Ho Mun (Undergraduate Intern, now Ph.D student at KAIST)
Yoo-Lim Cheon (Ph.D, now at KFE)
Ji-Min Seok (Ph.D, now at PAL)


Outside Collaborators: 
Fermilab: MTA/MAP group, FAST/IOTA group, DUNE Collaboration
PPPL: Beam physics (Dr. Hong Qin, Prof. Ronald C. Davidson-Passed away on 19 May 2016)
ESS: Beam instrumentation group (Dr. Andreas Jansson)
GSI: Linac group (Dr. Lars Groening)
CERN: AWAKE Collaboration, GBAR Collaboration
ICL/RAL: MICE Collaboration, nuSTORM
Max Planck Institute for Nuclear Physics, Heidelberg: EBIT group (Dr. Jose R. Crespo López-Urrutia)
Yerevan Physics Institute: Accelerator diagnostics group (Dr. Suren Arutunian)
SNU, KU-Sejong: Antiproton trap
PAL: e-LABs (former ITF), High-power cyclotron/linac for ADS, 4GSR
RISP: Beam diagnostics, EBIS, NDPS, Beam dynamics
Center for Axion and Precision Physics (CAPP): Muon beam manipulations and diagnostics
ANL: AWA group (Dr. Gwanghui Ha, Dr. Seong-Yeol Kim)