Press ReleaseAug. 10? 2021
Association of Asia-Pacific Physical Societies (AAPPS)
Division of Plasma Physics (AAPPS-DPP)

Subramanyan Chandrasekhar Prize of Plasma Physics– Professor Taik Soo Hahm is selected as 8th (2021) Laureate –The Division of Plasma Physics (CEO: Mitsuru Kikuchi, Chair: Baonian Wan)
under the Association of Asia Pacific Physical Societies (President: Jun’ichi
Yokoyama) has selected Professor Taik Soo Hahm of the SNU (Seoul NationalUniversity) as the 8th (2021) Laureate of S. Chandrasekhar Prize of Plasma Physics,
which is awarded to scientist who have made seminal / pioneering contributions inthe field of plasma physics.
CitationsTaik Soo Hahm ： For his outstanding contributions to the understanding ofturbulence and confinement physics in tokamak plasmas, i.e., notably, flow shearing
effects and non-local transport processes, as well as to the pioneering development ofmodern nonlinear gyrokinetic theories.
Contact points：
AAPPS-DPP Representative Director and CEO, Mitsuru Kikuchi (AAPPS-DPP Association Inc.)
TEL: +81-80-1115-3482, E-mail: aapps.dpp.ceo@gmail.com
AAPPS-DPP Executive Officer, Haruo Nagai TEL: +81-080-1096-4575
AAPPS-DPP Homepage Address：http://aappsdpp.org/AAPPSDPPF/index.html

Subrahman an Chandrasekhar Pri eof Plasma Ph sics
is a arded b Di ision of Plasma Ph sics, AAPPS
for outstanding contribution to the field of Plasma Ph sics.
This Diploma certifies that 2021 Pri e has been a arded toTaik Soo Hahm

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h ic ika ak la a , i.e.,abl , flhea i geffec a d-l cal ace e , aell ahe i ee i gde elefdeli ea g ki e ic he ie .

Baonian Wan

26 September, 2021
Division of Plasma Physics, AAPPS

Hiroshi Yamada
Chair of Selection Committee

Chair of DPP

Certificates of 2021 S. Chandrasekhar Prize of Plasma Physics
Certificate and medal will be virtually given at the 5th Asia-Pacific Conference on Plasma Physics(AAPPS-DPP2021 online e-conference) Sept, 26-Oct 1, 2021.
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On the achievements of Professor Taik Soo Hahm
Prof. Taik Soo Hahm was born in 1957 in Seoul,received his Batchelor’s degree from Seoul NationalUniversity in 1980, and Ph.D. degree from Princeton
University in 1984. After taking a postdoctoral
position at University of Texas, he worked atPrinceton Plasma Physics Laboratory since 1986,and became a Distinguished Laboratory Research
Fellow in 2006. Then, he moved to Seoul National
University as a full Professor of Department of
Nuclear Engineering in 2011. In addition, he also
worked at National Fusion Research Institute(upgraded to Korea Institute of Fusion Energy inProf. Taik Soo Hahm2020) as the Director of Advanced Technology
Research Center from 2015 to 2017.
He is well-known internationally for his fundamental contributions to several
subjects in magnetic fusion plasma research including:
1. The development of modern nonlinear gyrokinetic theory in toroidal geometry
published in [Hahm, Phys. Fluids 1988] with 367 WoS citations and [Brizard andHahm, Rev. Mod. Phys 2007] with 614 WoS citations.
2. The ExB flow shear reduction of plasma turbulence in general toroidal geometry inwhich radial variation of poloidal magnetic field in addition to that of radial electricfield is shown to be important. This has been published in [Hahm and Burrell, Phys.
Plasmas 1995] with 497 WoS citations and enhanced the level of theory-experimentvalidation regarding transport barrier formation.
3. The introduction of self-organized criticality to magnetic fusion as a nonlocal
transport mechanism published in [Diamond and Hahm, Phys. Plasmas 1995] with
317 WoS citations, and the development of turbulence spreading theory andcomparisons to gyrokinetic simulations in [Hahm, Diamond, Lin, Itoh and Itoh,
PPCF 2004] with 153 WoS citations.
4. The modern gyrokinetic derivation of magnetic curvature driven non-diffusive
momentum flux, known as the turbulent equipartition (TEP) momentum pinch
published in [Hahm, Diamond, Gurcan and Rewoldt, Phys. Plasmas 2007] with 151
citations.
5. The key role in bridging theory, gyrokinetic simulations and experimental
measurements, in particular on zonal flows in [Hahm, Burrell, Lin, Nazikian andSynakowski, PPCF 2000] with 91 WoS citations and in summarizing their status in a
widely recognized review [Diamond, Itoh, Itoh and Hahm, PPCF 2005] with 1,389
citations.
His total citation is 10,971, with an average citations per paper 62, and H-index 48
according to Web of Science. He was elected to a Fellow of American PhysicalSociety in 1995, and received the Kaul Prize for Excellence in Plasma Physics andTechnology Development in 2005.
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Appendix:
1. Subrahmanyan Chandrasekhar
Astrophysicist born in India. He received the Nobel Prize in Physics in 1983 for his theoreticalstudies of the physical processes of importance to the structure and evolution of stars, including theChandrasekhar limit on the mass of white dwarf stars. His research covered several broad areas, asseen from his texts, which included Principles of Stellar Dynamics (1942), Hydrodynamics andHydromagnetic Stability (1981), and an influential book based on his lecture notes in Plasma
Physics (1960).

2. AAPPS: Association of Asia-Pacific Physical Societies（HP: http://www.aapps.org/main/index.php）
The Association of physical societies in the Asia Pacific region founded by the Nobel Laureate in
Physics C.N. Yang, and Professor Akito Arima in 1983. The AAPPS held the 12th Asia PacificPhysics Conference under the president (at that time) Shoji Nagamiya in Makuhari, Japan. The
current president is Professor Jun’ichi Yokoyama, the University of Tokyo, Japan.

3. AAPPS-DPP: Division of Plasma Physics, AAPPS（HP : http://aappsdpp.org/AAPPSDPPF/index.html ）The first division under the AAPPS based on the success of the plasma physics program in theAPPC-12. This division was formed in January 2014 based on the recommendation of Professor
Nagamiya at the AAPPS council. From Nov 28, 2018, AAPPS-DPP becomes legal entity
http://aappsdpp.org/DPPhoujin/index.html .

4. Subrahmanyan Chandrasekhar Prize of Plasma Physics
Subrahmanyan Chandrasekhar Prize of Plasma Physics is a top plasma physics prize founded by
the AAPPS-DPP in July 2014 and is endorsed by AAPPS. This prize is given to a plasma physicist
annually for pioneering and/or seminal contribution to plasma physics. The prize recipients wereProfessor S. Ichimaru (2014), Professor P. Kaw (2015), Professor D. Melrose (2016), Professors
C.Z. Cheng and Lou C. Lee (2017), Professor Toshiki Tajima (2018), Professors Liu Chen andKazunari Shibata (2019), Professor Hyeon Park (2020)(http://aappsdpp.org/AAPPSDPPF/prizetable.html).
The 2020 Selection Committee composed of leading plasma physicists in Asia-Pacific region.
Chairman : Professor Hiroshi Yamada (The University of Tokyo)
Vice-chair: Professor Liu Chen (Zhejiang University)
Members : Professor Hideo Sugama (National Institute of Fusion Science)
Professor Michio Yamada (Kyoto University)
Professor Peng-Fei Chen (Nanjing University)
Professor Shaojie Wang (University of Science and Technology)
Professor Abraham Chian (University of Adelaide)
Professor Amita Das (Indian Institute of Technology Delhi)
Professor Sudeep Bhattacharjee (Indian Institute of Technology Kanpur)
Professor Lin-Ni Hau (National Central University)
Professor Chang-Hee Nam (Gwangju Institute of Science and Technology)
Dr. Jae-Min Kwon (Korea Institute of Fusion Energy)3