11 citations · 21 across the 10 of their papers we have counts for
11 papers
Monoenergetic acceleration of charge-neutralized ion bunches to GeV-scale energies by the combination of a high-current electron beam and an ionization front
Jiyuan Chen, Jihoon Kim, Roopendra Singh Rajawat +1
Compact heavy ion accelerators have numerous applications, ranging from heavy ion fusion to carbon ion radiotherapy, and testing radiation-hardened electronics. The demand could be…
Propagation and collisionless damping of topologically-protected surface plasma waves in non-uniformly magnetized plasma columns
Roopendra Singh Rajawat, Gennady Shvets
Recent theoretical studies revealed the existence of topologically-protected surface plasma waves (TSPWs) in cold magnetized plasmas assumed uniform along the direction of a uniaxi…
Simultaneous amplification and shaping of excimer lasers using Stimulated Brillouin Scattering in the strongly damped limit
Jihoon Kim, Roopendra Rajawat, Polina Blinova +6
Attaining practical Inertial Fusion Energy (IFE) depends on how efficiently one can couple the driver energy to the nuclear fusion fuel for compression and ignition. While the exci…
Effects of Laser Polarization on Target Focusing and Acceleration in a Laser-Ion Lens and Accelerator
Roopendra Singh Rajawat, Tianhong Wang, V. Khudik +1
We present the process of ion acceleration using ultra-thin foils irradiated by elliptically polarized, high-intensity laser pulses. Recently, efficient generation of monoenergetic…
Acceleration and focusing of multispecies ion beam using a converging laser-driven shock
Jihoon Kim, Roopendra Rajawat, Tianhong Wang +1
We demonstrate an ion acceleration scheme capable of simultaneously focusing and accelerating a multispecies ion beam with monoenergetic spectra to a few micron radius. The focal l…
Nontrivial low-frequency topological waves at the boundary of a magnetized plasma
Roopendra Singh Rajawat, Tianhong Wang, Gennady Shvets
The topological properties of a magnetized cold gaseous plasma have recently been explored and the existence of topologically protected edge states has been established. These stud…
Continuum damping of topologically-protected edge modes at the boundary of a magnetized plasma
Roopendra Singh Rajawat, V. Khudik, G. Shvets
Recent extension of the topological ideas to continuous systems with broken time-reversal symmetry, such as magnetized plasmas, provides new insights into the nature of scattering-…
Fermi acceleration in relativistic collisionless plasma shocks correlates with anisotropic energy gains
Roopendra Singh Rajawat, Vladimir Khudik, Gennady Shvets
Collisionless shocks generated by two colliding relativistic electron-positron plasma shells are studied using particle-in-cell (PIC) simulations. Shocks are mediated by the Weibel…
Stationary Bernstein-Greene-Kruskal structures in a current carrying relativistic cold plasma
Roopendra Singh Rajawat, Sudip Sengupta, Nikhil Chakrabarti
Nonlinear stationary structures formed in a cold plasma with immobile ions in the presence of a relativistic electron current beam have been investigated analytically in the collis…
Particle-in-cell simulation of Buneman instability beyond quasilinear saturation
Roopendra Singh Rajawat, Sudip Sengupta
Spatio-temporal evolution of Buneman instability has been followed numerically till its quasilinear quenching and beyond, using an in-house developed electrostatic 1D particle-in-c…
One dimensional PIC simulation of relativistic Buneman instability
Roopendra Singh Rajawat, Sudip Sengupta
Spatio-temporal evolution of the relativistic Buneman instability has been investigated in one dimension using an in-house developed particle-in-cell simulation code. Starting from…