1. Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712, USA
2. Department of Physics, School of Natural Sciences, Shiv Nadar University, Uttar Pradesh 201314, India
3. Institute for Theory and Computation, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA
4. John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA