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2023-12-22
:7334
MaZhiwei Ph.D.
professor | Doctoral supervisor
School Of Physics
二维码
  • 86-571-87953964
    • Theory and simulation on space and fusion plasmas

Education:

1978.11-1982.7 B.S.    Hangzhou University, Zhejiang, China

1985.9-1988.1   M.S.   Southwestern Institute of Physics, Sichuan, China

1989.9-1994.5   Ph.D.  University of Alaska-Fairbanks, Alaska, USA

 

Experience:

1982.9-1989.8     Research Associate - Southwestern Institute of Physics, Sichuan, China

1989.9-1994.5     Research and Teaching Assistant - University of Alaska, Alaska, USA

1994.6-1996.6     Research Investigator - University of Iowa, Iowa, USA

1996.7-2006.1     Senior Research Scientist - University of Iowa, Iowa, USA

2003.5-2006.3     Research Professor - Institute of Plasma Physics, Anhui, China

2006.3-present     Professor    –       Zhejiang University, Zhejiang, China

 

Honors:              

1993, “Outstanding achievement in Space Science Research”, Space Research Program in University of Alaska-Fairbanks, Alaska, USA

 

Academic:

 President, computational plasma physics society, 2009 

 Editorial Board, Computational Physics, 2008

Adjunct Professor, Peking University, 2006

Adjunct Professor, University of Science and Technology of China, 2004


Research interests:

 Theory and numerical simulation on magnetic confinement fusion plasma: MHD instability, energetic particle-driven instability, wave heating and current drive.

Theory and numerical simulation on space plasma: dynamic process in the Earth's magnetosphere; solar flares, coronal mass ejection; magnetic reconnection.


Research Achievement:

My research over past decades focused mainly on magnetic reconnection, MHD instabilities, and energetic particle dynamics  in space and laboratory plasmas.

Magnetic reconnection is one of the most important processes in astrophysical, space and laboratory plasmas. But the old models of magnetic reconnection have difficulty in explaining the observed time scales associated with solar flares and magnetotail substorms in space as well as the sawtooth crashes in magnetically confined devices. We have first proposed a driven reconnection model [PoP, 1996] and found that the time scale of magnetic reconnection depends weakly on the resistivity (η1/5). This model has been used successfully to explain the explosive growth phase in substorms [GRL, 1995]. Later, we have first demonstrated that the decoupling of electron and ion motion or the Hall effect plays an important role in the dynamic evolution of magnetic reconnection and results in a fast reconnection with a time scale nearly independent of the resistivity [GRL, 1996], and this Hall MHD model of magnetic reconnection has been used to explain the substorm [GRL, 1998] and solar flare [POP, 2001]. The Hall MHD model and its results have been confirmed by GEM challenge (several team work, I am one of co-authors) [JGR, 2001] and our work [JGR, 2001]. The scaling law of collisionless forced reconnection was analytically calculated and tested by Hall MHD simulations [PRL, 2001]. Together with coworkers, we have identified for the first time the existence of a pair of nulls, the null-null line, fans, and spines associated with magnetic reconnection [Nature Physics 2006 and 2007].

By cooperation with the experimental team at the University of Iowa, we have first observed double Mach cones, first compressive then rarefactive, in a two-dimensional strongly coupled crystalline dust plasma [PRL, 1999a nd PRE, 2000]. Besides the compressive Mach cone, our molecular-dynamics simulations have shown that a shear-wave Mach cone co-exists in a crystalline dust plasma [PoP, 2002]. The simulation results have been confirmed by our experiment [PRL, 2002].

     We independently developed the first 3D toroidal MHD code (CLT) and the first 3D particle-MHD hybrid code (CLT-K) in China . We used CLT to study dynamics of  tearing modes and the control of tearing mode instability by external driven current in tokamak.  The influence of the Hall effect on the instability of single and double tearing modes is studied by using CLT. We investigate dynamics of toroidal Alfven eigenmodes driven by energetic particles as well as the interaction between toroidal Alfven eigenmodes and tearing modes by using  CLT-K. Total 121 SCI papers have beeb published with  nearly 3,500 citations.

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