Zobrazeno 1 - 10
of 249
pro vyhledávání: '"Kumar G. Ravindra"'
Autor:
Choudhary, Anandam, Goswami, Laxman Prasad, Aparajit, C., Lad, Amit D., Parab, Ameya, Ved, Yash M., Das, Amita, Kumar, G. Ravindra
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 and particle
Externí odkaz:
http://arxiv.org/abs/2405.14375
The complex interaction dynamics of intense femtosecond (fs) pulses and their picosecond (ps)-long leading edge with nanostructured solids occur at both the nanometer and the femtosecond scales, making them extremely difficult to measure directly. He
Externí odkaz:
http://arxiv.org/abs/2403.10908
Autor:
Aparajit, C., Choudhary, Anandam, Dulat, Ankit, Grech, Mickael, Marini, Samuel, Lad, Amit D., Ved, Yash M., Raynaud, Michèle, Riconda, Caterina, Kumar, G. Ravindra
Extreme intensity contrast is considered essential for ultraintense, femtosecond laser excitation of solid targets, in particular for studies with structured or ultra-thin targets. Second-harmonic generation has been used to maximize the contrast in
Externí odkaz:
http://arxiv.org/abs/2402.11360
Autor:
Dulat, Ankit, Rakeeb, Sk, Dam, Sagar, Lad, Amit D., Ved, Yash M., Kruk, Sergey, Kumar, G. Ravindra
Femtosecond laser pulses, amplified to ultrahigh intensities, can drive electrons in solids to relativistic energies via collective motion, paving the way for miniaturized particle accelerators and powerful extreme-ultraviolet light sources. However,
Externí odkaz:
http://arxiv.org/abs/2401.05037
Autor:
Choudhary, Anandam, Dhalia, Trishul, Aparajit, C., Lad, Amit D., Dulat, Ankit, Ved, Yash M., Juneja, Rohit, Das, Amita, Kumar, G. Ravindra
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 generated by the
Externí odkaz:
http://arxiv.org/abs/2311.06884
Autor:
Shaikh, Moniruzzaman, Lad, Amit D, Mandal, Devshree, Jana, Kamalesh, Sarkar, Deep, Das, Amita, Kumar, G Ravindra
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 seriously chal
Externí odkaz:
http://arxiv.org/abs/2311.00083
Autor:
Dulat, Ankit, Lad, Amit D., Aparajit, C., Choudhary, Anandam, Ved, Yash M., Veisz, Laszlo, Kumar, G. Ravindra
Ultrahigh peak power femtosecond laser pulses create extreme states of matter that are currently being probed with great interest. Plasma optics have been proposed for shaping and amplifying high-power pulses, but they are subject to huge modulations
Externí odkaz:
http://arxiv.org/abs/2310.11027
Autor:
Jana, Kamalesh, Lad, Amit D., Zhang, Guo-Bo, Li, Bo-Yuan, Kumar, V. Rakesh, Shaikh, Moniruzzaman, Ved, Yash M., Chen, Min, Kumar, G. Ravindra
Publikováno v:
Phys. Plasmas 31, 033105 (2024)
We investigate the production of hot electrons from the interaction of relativistically intense ($I> 10^{18} W/cm^{2}$) ultra-short (25 fs) laser pulses with sub-wavelength grating target. We measure the hot electron angular distribution and energy s
Externí odkaz:
http://arxiv.org/abs/2307.04320
Autor:
Pasley John, Bush I. A., Robinson Alexander P. L., Rajeev P. P., Mondal S., Lad A. D., Ahmed S., Narayanan V., Kumar G. Ravindra, Kingham Robert J.
Publikováno v:
Nukleonika, Vol 60, Iss 2, Pp 193-198 (2015)
When intense short-pulse laser beams (I > 1022 W/m2, τ < 20 ps) interact with high density plasmas, strong shock waves are launched. These shock waves may be generated by a range of processes, and the relative significance of the various mechanisms
Externí odkaz:
https://doaj.org/article/d67a6c9cf51d42cb88e31d6629222c29
Autor:
Dulat, Ankit, Aparajit, C., Choudhary, Anandam, Lad, Amit D., Ved, Yash M., Kumar, G. Ravindra
Using spectral interferometry technique, we measured subpicosecond time-resolved pre-plasma scale lengths and early expansion ($<$ 12 ps) of the plasma produced by a high intensity (2$\times$10$^{18}$ W/cm$^{2}$) pulse with ultra-high contrast (10$^{
Externí odkaz:
http://arxiv.org/abs/2110.14595