Amita Das
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View article: Universal energy cascade and relaxation in three-dimensional inertial electron magnetohydrodynamic turbulence
Universal energy cascade and relaxation in three-dimensional inertial electron magnetohydrodynamic turbulence Open
Electron magnetohydrodynamics (EMHD) provides a useful single-fluid model of plasmas across the electron-scales. The heating and acceleration of weakly collisional space plasmas may be described in terms of a scale-by-scale energy cascade …
View article: Experimental signatures for identifying distinct origins of color field generation
Experimental signatures for identifying distinct origins of color field generation Open
Signatures for non-abelian dynamics have long been central to QCD and quark-gluon plasma. Equally important are they in spin systems and laser-plasma interactions, where they emerge as effective interactions. Distinguishing experimentally …
View article: Spatial, Spectral and Temporal Response of High Intensity Laser Plasma Mirrors- Direct Observation of the Ponderomotive Push
Spatial, Spectral and Temporal Response of High Intensity Laser Plasma Mirrors- Direct Observation of the Ponderomotive Push Open
Plasma-based optics have emerged as a powerful platform for manipulating and amplifying ultra-intense laser pulses. However, the inherently nonlinear and dynamic nature of plasma leads to significant spatial, spectral, and temporal modulat…
View article: Design, fabrication and characterization of 8x9 n-type silicon pad array for sampling calorimetry
Design, fabrication and characterization of 8x9 n-type silicon pad array for sampling calorimetry Open
This paper reports the development and testing of n-type silicon pad array detectors intended for the Forward Calorimeter (FoCal) detector, which is an upgrade of the ALICE detector at CERN, scheduled for data taking in Run 4 (2029–2034). …
View article: Experimental Signatures for Identifying Distinct Origins of Color Field Generation
Experimental Signatures for Identifying Distinct Origins of Color Field Generation Open
Signatures for non-abelian dynamics have long been central to QCD and QGP. Equally important are they in spin systems and laser-plasma interactions, where they emerge as effective interactions. Distinguishing experimentally gauge inequival…
View article: Laser pulse focusing and energetic electron generation by magnetized plasma lens
Laser pulse focusing and energetic electron generation by magnetized plasma lens Open
An efficient mechanism of laser pulse focusing with the help of shaped underdense plasma target immersed in inhomogeneous magnetic field has been demonstrated. These studies have been carried out with the help of 2-D Particle-In-Cell (PIC)…
View article: Chaos aided regime of Laser/Electromagnetic Energy Absorption by plasma
Chaos aided regime of Laser/Electromagnetic Energy Absorption by plasma Open
The absorption of laser energy by plasma is of paramount importance for various applications. Collisional and resonant processes are often invoked for this purpose. However, in some contexts (e.g. in vacuum and the JxB heating), the energy…
View article: Generation of mega-gauss axial and azimuthal magnetic fields in a solid plasma by ultrahigh intensity, circularly polarized femtosecond laser pulses
Generation of mega-gauss axial and azimuthal magnetic fields in a solid plasma by ultrahigh intensity, circularly polarized femtosecond laser pulses Open
The interaction of intense linearly polarized (LP) femtosecond laser pulses with solids is known to generate azimuthal magnetic fields, while circularly polarized (CP) light has been shown to create axial fields. We demonstrate through exp…
View article: Electric-charge-dependent directed flow splitting of produced quarks in Au+Au collisions
Electric-charge-dependent directed flow splitting of produced quarks in Au+Au collisions Open
View article: Bulk and Surface Dominated Phenomena and the Formation of Pentagonal Structures in 2-D Strongly Coupled Finite Dust Clusters
Bulk and Surface Dominated Phenomena and the Formation of Pentagonal Structures in 2-D Strongly Coupled Finite Dust Clusters Open
View article: Bulk and surface dominated phenomena and the formation of pentagonal structures in 2-D strongly coupled finite dust clusters
Bulk and surface dominated phenomena and the formation of pentagonal structures in 2-D strongly coupled finite dust clusters Open
This paper explores the prevalence of size-dependent aspects in the context of dust clusters with the help of Molecular Dynamics (MD) simulations in two dimensions. The transition from macroscale (identified by the dominance of the number …
View article: Efficient electron heating by laser in finite sized plasma micro-globular targets by repeated collisions of surface and bulk waves
Efficient electron heating by laser in finite sized plasma micro-globular targets by repeated collisions of surface and bulk waves Open
A new mechanism of enhanced laser energy absorption in plasma microglobules is demonstrated with the help of two-dimensional Particle-In-Cell (PIC) simulations. The mechanism relies on the excitation of surface and bulk waves and the occur…
View article: Diffusive transport of a 2-D magnetized dusty plasma cloud
Diffusive transport of a 2-D magnetized dusty plasma cloud Open
Dusty plasma medium turns out to be an ideal system for studying the strongly coupled behavior of matter. The large size and slow response make their dynamics suitable to be captured through simple diagnostic tools. Furthermore, as the cha…
View article: Generation of mega-gauss axial and azimuthal magnetic fields in a solid plasma by ultrahigh intensity, circularly polarised femtosecond laser pulses
Generation of mega-gauss axial and azimuthal magnetic fields in a solid plasma by ultrahigh intensity, circularly polarised femtosecond laser pulses Open
The interaction of intense linearly polarized femtosecond laser pulses with solids is known to generate azimuthal magnetic fields, while circularly polarized light has been shown to create axial fields. We demonstrate through experiments a…
View article: Novel instabilities in counter-streaming nonabelian fluids
Novel instabilities in counter-streaming nonabelian fluids Open
The dynamics of strongly interacting particles are governed by Yang–Mills (Y–M) theory, which is a natural generalization of Maxwell Electrodynamics (ED). Its quantized version is known as quantum chromodynamics (QCD) (Gross and Wilczek, 1…
View article: Evolution of Shielding Cloud Under Oscillatory External Forcing in Strongly Coupled Ultracold Neutral Plasma
Evolution of Shielding Cloud Under Oscillatory External Forcing in Strongly Coupled Ultracold Neutral Plasma Open
This paper investigates the dynamics of crystalline clusters observed in Molecular Dynamics (MD) studies conducted earlier [Yadav, M., et al. Physical Review E, 107(5), 055214(2023)] for ultra-cold neutral plasmas. An external oscillatory …
View article: Enhanced plasma ion heating by lasers in inhomogeneous external magnetic field
Enhanced plasma ion heating by lasers in inhomogeneous external magnetic field Open
Recent studies have shown direct ion heating (vashistha2020new,Juneja_2023) by lasers EM (Electromagnetic) wave interacting with a plasma threaded by an external uniform magnetic field. The EM wave frequency was near the lower hybrid (LH) …
View article: Fluid Simulation for a Finite Size Plasma
Fluid Simulation for a Finite Size Plasma Open
Studies on finite-size plasma have attracted a lot of attention lately. They can form by ionizing liquid droplets by lasers. The dynamical behavior of such plasma droplets is, therefore, a topic of significant interest. In particular, ques…
View article: Absorption of electromagnetic waves at oblique resonance in plasmas threaded by inhomogenous magnetic fields
Absorption of electromagnetic waves at oblique resonance in plasmas threaded by inhomogenous magnetic fields Open
There has been significant interest lately in the study of Electromagnetic (EM) waves interacting with magnetized plasmas. The variety of resonances and the existence of several pass and stop bands in the dispersion curve for different ori…
View article: Diffusive Transport of a 2-D Magnetized Dusty Plasma Cloud
Diffusive Transport of a 2-D Magnetized Dusty Plasma Cloud Open
View article: Evolution of Shielding Cloud Under Oscillatory External Forcing in Strongly Coupled Ultracold Neutral Plasma
Evolution of Shielding Cloud Under Oscillatory External Forcing in Strongly Coupled Ultracold Neutral Plasma Open
View article: Novel Instabilities in Counter-Streaming Nonabelian Fluids
Novel Instabilities in Counter-Streaming Nonabelian Fluids Open
The dynamics of strongly interacting particles are governed by Yang-Mills (Y-M) theory, which is a natural generalization of Maxwell Electrodynamics (ED). Its quantized version is known as quantum chromodynamics (QCD) and has been very wel…
View article: Controlling intense, ultrashort, laser-driven relativistic mega-ampere electron fluxes by a modest, static magnetic field
Controlling intense, ultrashort, laser-driven relativistic mega-ampere electron fluxes by a modest, static magnetic field Open
The guiding and control of ultrahigh flux, femtosecond relativistic electron pulses through solid density matter is of great importance for many areas of high energy density science. Efforts so far include the use of magnetic fields genera…
View article: Mapping the complete evolution of magnetic excitation in beam-plasma system driven by an ultra-intense, femtosecond laser
Mapping the complete evolution of magnetic excitation in beam-plasma system driven by an ultra-intense, femtosecond laser Open
Plasmas are beset with instabilities of all types, hydrodynamic, magneto-hydrodynamic, and electromagnetic. These instabilities are complex, occur over a large range of temporal and spatial scales, are most often unmanageable, and have ser…
View article: Longitudinal and transverse spin transfer to $Λ$ and $\overlineΛ$ hyperons in polarized $p$+$p$ collisions at $\sqrt{s} = 200$ GeV
Longitudinal and transverse spin transfer to $Λ$ and $\overlineΛ$ hyperons in polarized $p$+$p$ collisions at $\sqrt{s} = 200$ GeV Open
The longitudinal and transverse spin transfers to $Λ$ ($\overlineΛ$) hyperons in polarized proton-proton collisions are expected to be sensitive to the helicity and transversity distributions, respectively, of (anti-)strange quarks in the …
View article: Reaction plane correlated triangular flow in Au+Au collisions at $\sqrt{s_{NN}}=3$ GeV
Reaction plane correlated triangular flow in Au+Au collisions at $\sqrt{s_{NN}}=3$ GeV Open
We measure triangular flow relative to the reaction plane at 3 GeV center-of-mass energy in Au+Au collisions at the BNL Relativistic Heavy Ion Collider. A significant $v_3$ signal for protons is observed, which increases for higher rapidit…
View article: Ion heating in laser interacting with magnetized plasma
Ion heating in laser interacting with magnetized plasma Open
The ion heating mechanism in the context of laser interacting with plasma immersed in a strong magnetic field is studied. The electron motion transverse to the magnetic field gets restricted, and it acquires comparatively less energy than …
View article: Two dimensional effects of laser interacting with magnetized plasma
Two dimensional effects of laser interacting with magnetized plasma Open
Recent advancements in low-frequency short-pulse $CO_2$ lasers and the production of strong magnetic fields have made experimental studies on laser interactions with magnetized plasma a near-future possibility. Therefore, theoretical and n…
View article: Beam Energy Dependence of Triton Production and Yield Ratio (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>N</mml:mi></mml:mrow><mml:mrow><mml:mi>t</mml:mi></mml:mrow></mml:msub><mml:mo>×</mml:mo><mml:msub><mml:mrow><mml:mi>N</mml:mi></mml:mrow><mml:mrow><mml:mi>p</mml:mi></mml:mrow></mml:msub><mml:mo>/</mml:mo><mml:msubsup><mml:mrow><mml:mi>N</mml:mi></mml:mrow><mml:mrow><mml:mi>d</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msubsup></mml:mrow></mml:math>) in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Au</mml:mi><mml:mo>+</mml:mo><mml:mi>Au</mml:mi></mml:mrow></mml:math> Collisions at RHIC
Beam Energy Dependence of Triton Production and Yield Ratio () in Collisions at RHIC Open
We report the triton (t) production in midrapidity (|y|<0.5) Au+Au collisions at sqrt[s_{NN}]=7.7-200 GeV measured by the STAR experiment from the first phase of the beam energy scan at the Relativistic Heavy Ion Collider. The nuclear comp…
View article: Ion heating in Laser interacting with magnetized plasma
Ion heating in Laser interacting with magnetized plasma Open
The ion heating mechanism in the context of laser interacting with plasma immersed in a strong magnetic field is studied. The magnetic field is chosen to be strong for laser electromagnetic field propagation inside the plasma to be governe…