aktripathi.phy's picture
Dr. Arvind Kumar Tripathi
Visiting Faculty
Department of Physics
aktripathi.phys@iitbhu.ac.in
+91 9415 812 783
Area of Interest: 
Planetary & Space Sciences, Planetary Space Weather

Present position                                  Visiting Faculty 

 

Academic Qualifications                    M.Sc.(Physics-Electronics), Ph.D in Applied Physics (IT-BHU)
                                                              GATE qualified in Physical Sciences
 
Address for Correspondence:             Department of Physics, IIT (BHU), Varanasi-22105
                                                                E-mail: aktripathi.phy@itbhu.ac.in  ;  aktrip2001@yahoo.co.in    
                                                                Mobile: +91 9415 812 783

           
Title of Thesis                                 Series solution of whistler mode instabilities in  Lorentzian (kappa) magnetoplasma

Fellowships Awarded                      ISRO - Scientist & Research Associate,
                                                          CSIR - Pool officer & Research Associate,
                                                          UGC - SRF & UGC - JRF and  BHU - RET

 

Worked in ISRO’s-Planetary Science Exploration Sponsored Projects & CSIR Projects                                                                                               
(1) ISRO project entitled “Study of magnetospheric plasma wave-particle interaction, aurora, airglow and conductivities
      on planets and their satellites
”  (worked as Scientist).
 
(2) ISRO project entitled “Study of plasma waves, aurora and ion composition on planets and their satellites”     
       (worked as RA).
 
(3) CSIR Project entitled “Physics of plasma waves and X-rays in planetary atmospheres & magnetospheres”     
      (worked as Pool-Officer).
 
(4) CSIR project entitled “Effect of suprathermal particles on the generation of plasma  waves in the planetary
       magnetospheres
”  (worked as RA).
 
 

Research Area                                  Planetary & Space Sciences, Planetary Space Weather

Research Interests               

Modeling of Planetary Atmosphere: Auroras and Airglow          

  1. My primary field of research is theoretical and observational studies of planetary atmospheres, ionospheres and their coupling with magnetospheric plasma and solar wind. 
  2. Research involves the role of plasma wave-particle interactions in collision-less space plasmas. 
  3. Wave induced scattering is responsible for the injection and loss of energetic particles from the radiation belts of a planet, and deposition of energy into the middle atmosphere. 
  4. Wave-particle scattering caused the transfer of energy from one particle population to another, and ultimately to stochastic acceleration processes at extremely high energies.  
  5. Study of aurora and airglow on planets: Earth, Jupiter including their satellites (Io plasma torus, Europa, Ganymede), Saturn including their moons (Titan and rings of Saturn), Uranus, and Neptune.                                                                                        
  6.  A new study of Ionosphere-magnetosphere coupling via secondary electrons emissions from Earth’s upper atmosphere in the presence of ECH and whistler mode waves.  
  • Analysis and Modeling of Moon Waves and Lunar-Atmosphere using data from Chandrayaan-1

     1.  Modeling of waves observed near-lunar wake at night-side: based on Chandrayaan-I observations. 
     2. To develop a comprehensive model of the lunar atmosphere due to interaction with solar wind and solar energetic particles. 
     3. A new view of wave phenomena at Moon: the solar wind-magnetic anomalies interaction. 

  • Modeling of Aurora and Airglow on Mars using data from Mangalyaan-I

       1. To develop a model of Aurora and Airglow on Mars. 
       2. Explanation of Mars’ diffuse aurora: A model of ultraviolet & visible emissions. 

  • Study of the constituents and dynamics of the atmosphere of Mars

        1. Study of the constituents of Martian atmosphere including CO and CO2.
        2. Study of the dynamics of the upper atmosphere of Mars, effects of solar wind and radiation. 
 

Studies on Moon and Mars will be carried out by using observational data of ISRO’s Chandrayaan-I and Mangalyaan-I/ Maven-NASA missions. These studies will be helpful for space scientists, researchers and for planning of ISRO’s missions to work on the formation mechanism of diffuse aurora and deposition of energy in the upper atmosphere at Earth and other planets on global scale. This study would also enhance scientific knowledge and help in understanding to explain the observational and theoretical studies of the origin and evolution of planets and their satellites in solar system.
 
 

Teaching Experience                                   12 years in Applied Physics, IT-BHU/Physics, IIT (BHU)
                                                                       At UG Level - 12 Years (Courses: EM Theory & Optics)
                                                                       At PG Level - 05 Years  (Course: Magnetohydrodynamics) 

 
  • A.K. Tripathi, R.P.Singhal, G.V. Khazanov                                                                                                                                                           
           Simple analytical expressions for electron pitch angle diffusion coefficients
            Physics of Plasmas, 24, doi:10.1063/1.4978555, 2017.
  • A.K.Tripathi, R.P.Singhal, and O.N.Singh II             

          The generation of Ganymede’s diffuse aurora through pitch angle scattering.
           Annales Geophysicae, 35, 239-252, 2017

  • R.P. Singhal, A.K. Tripathi, S. Halder, O.N. Singh II          

           Diffuse aurora on Ganymede driven by electrostatic waves.
          The Astrophysical Journal, 832, 172, doi:10.3847/0004-637x/832/2/172, 2016.                      

  • A.K.Tripathi, R.P.Singhal, G.V. Khazanov, L. A. Avanov      
           Banded structures in electron pitch angle diffusion coefficients from resonant wave-particle interactions.
            Physics of Plasmas (USA), 23, 042101; doi: 10.1063/1.4944920, 2016.
  • G.V. Khazanov, A.K. Tripathi, D. Sibeck,  E.Himwich, A. Glocer,  R.P.Singhal  

            Electron distribution function formation in the regions of diffuse aurora.
            J. Geophysical Research (USA), 120, doi: 10.1002/2015JA021728, 2015.

  • G.V. Khazanov, A.K. Tripathi, R.P.Singhal, E.W.Himwich, A. Glocer   

            Superthermal electron magnetosphere-ionosphere coupling in the diffuse aurora in the presence of ECH waves
            J. Geophysical Research (USA), 120, 445-459, 2015.

  • A.K.Tripathi, R.P.Singhal, K.P.Singh and O.N.Singh II     

            Electron cyclotron harmonic instability near Ganymede
             Astrophysics & Space Science (USA), 352, 421-427, 2014.

  • A.K.Tripathi, R.P.Singhal, K.P.Singh and O.N.Singh II     

            Whistler mode instability and pitch-angle diffusion near Ganymede
              Planetary & Space Science (UK), 92, 150-156, 2014.

  • A.K.Tripathi, R.P.Singhal, K.P.Singh and O.N.Singh II     

            Pitch angle diffusion by whistler mode waves in the Jovian magnetosphere and diffuse
             auroral precipitation, ICARUS, 225, 424-431, 2013.

  • A.K.Tripathi and R.P.Singhal                                              

            Diffusion coefficients from resonant interactions with electrostatic cyclotron harmonic waves
            Physics of Plasmas (USA), 16, 1-7, 2009.       

  • A.K.Tripathi and R.P.Singhal                                              

           Whistler mode instability in magnetospheres of Uranus and Neptune.
           Planetary & Space. Science (UK), 56, 310-319, 2008.

  • A.K.Tripathi and R.P.Singhal                                              

          Electrostatic electron-cyclotron harmonic instability in outer planetary magnetospheres.  
           Planetary & Space Science (UK), 55, 876-888, 2007.

  • R.P.Singhal and A.K.Tripathi                                              

            Study of whistler mode instability in Saturn’s magnetosphere.
            Annales Geophysicae (Germany), 24, 1705-712, 2006.

  • R.P.Singhal and A.K.Tripathi                                              

          Dielectric tensor for a plasma with a loss-cone kappa-Maxwellian velocity distribution.
          Physics of Plasmas (USA), 13, 012102-1-7, 2005.            

  • A.K.Tripathi and R.P.Singhal                                              

            Electrostatic electron-cyclotron harmonic instability due to energetic electrons in Jupiter’s magnetosphere.
            J. Geophysical Research (USA), 110, A12205,.doi:10.1029/2005JA011113, 2005.