44 Result(s)
within
R Srinivasan
Physics
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Article
Photometric calibrations and characterization of the 4K \(\times \) 4K CCD imager, the first-light axial port instrument for the 3.6m DOT
In the present work, recent characterization results of the 4K \(\times \) × ...
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Article
The perturbation analysis of a plasma soliton in the presence of averaged complex Stenflo relaxation and Gibbons potentials
On the basis of perturbation approach, we present here the behavior of a plasma soliton, in the presence of averaged complex Stenflo relaxation and Gibbons potentials, for (1) amplitude, (2) velocity, (3) phas...
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Article
Chemical, Morphological, Structural, Optical, and Magnetic Properties of Transition Metal Titanium (Ti)-Doped LaFeO3 Nanoparticles
In the present work, pure and transition metal titanium (Ti)-doped LaFe1−xTixO3(x = 0.0, 0.2, 0.4, and 0.6) nanoparticles have been successfully synthesized by hydrothermal synthesis technique for various molar r...
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Article
VHE gamma-ray observation of Crab Nebula with HAGAR telescope array
HAGAR is a system of seven Non-imaging Atmospheric Cherenkov Telescopes located at Hanle in the Ladakh region of the Indian Himalayas at an altitude of 4270 meters amsl. Since 2008, we have observed the Crab Nebu...
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Article
One-dimensional nuclear design analyses of the SST-2
Steady State Tokamak-2 (SST-2) will be an intermediate fusion machine before Indian DEMOnstration power reactor (DEMO) development to realise the reactor technologies. It is designed for fusion gain ...
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Article
Calculated differential and double differential cross section of DT neutron induced reactions on natural chromium (Cr)
Chromium is an important alloying element of stainless steel (SS) and SS is the main constituent of structural material proposed for fusion reactors. Energy and double differential cross section data will be r...
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Article
Second-harmonic ion cyclotron resonance heating scenarios of Aditya tokamak plasma
Plasma heating with the fast magnetosonic waves in the ion cyclotron range of frequencies (ICRF) is one of the auxiliary heating schemes of Aditya tokamak. Numerical simulation of second-harmonic resonance hea...
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Article
Invariants for E0-Semigroups on II1 Factors
We introduce four new cocycle conjugacy invariants for E 0-semigroups on II 1 factors: a coupling index, a dimension for the gauge group, a super product system and...
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Article
Pointing of HAGAR telescope mirrors
An array of seven atmospheric Cherenkov telescopes was commissioned at a high altitude site in Hanle in the Ladakh region of the Himalayas. The array called HAGAR has been designed to observe celestial γ-rays of ...
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Article
Intensity Oscillation in the Corona as Observed during the Total Solar Eclipse of 29 March 2006
We obtained the images of the eastern part of the solar corona in the Fe xiv 530.3 nm (green) and Fe x 637.4 nm (red) coronal emission lines during the total solar eclipse of 29 March 2006 at Manavgat, Antalya, T...
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Article
Generalized CCR Flows
We introduce a new construction of E 0-semigroups, called generalized CCR flows, with two kinds of descriptions: those arising from sum systems and those arising from pairs of C ...
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Article
Vortices in Bose-Einstein condensates: A review of the experimental results
Rotating dilute Bose-Einstein condensates (BEC) of alkali atoms offer a testing ground for theories of vortices in weakly interacting superfluids. In a rotating super-fluid, quantised vortices, with a vorticit...
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Article
Fluorescence from doubly driven four-level atoms
The unusually narrow features in the fluorescence from 85Rb driven by two laser fields L1 and L2, reported in [1], are explained on the basis of a four-level density matrix calculation. The L2 laser enables atom ...
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Article
Short-period intensity oscillations in the solar corona observed during the total solar eclipse of 26 February 1998
Encouraged by the detection of high-frequency, low-amplitude continuum intensity oscillations in the solar corona during the total solar eclipse of 1995, we designed and fabricated a six-channel photometer inc...
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Article
Magnetic shielding behavior of YBCO cylinders— A universal scaling property
Magnetic shielding studies have been carried out to investigate the usefulness of high-T c YBCO ceramics for EMS applications. The starting materials were single-phase YBCO powder. The cylinders were prepared by ...
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Article
Even harmonics of AC susceptibility in some sintered pellets of high temperature superconductors
The real (χ′ n) and imaginary (χ″ n) parts of even harmonic susceptibility (n⩽6) are measured as a function of external DC field (H dc) in the field increasing (H↑)...
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Interaction of Laser Radiation with Organic Polymers
Organic polymers form a class of organic molecules of considerable technological importance in the field of materials processing. For this reason, their interactions with laser radiation have attracted attenti...
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Article
Critical current density of a sample of melt grown Y1.2Ba1.8Cu2.4O x
Melt grown samples of Y1.2Ba1.8Cu2.4O x have been prepared and studied for their current carrying capacity. The composition was chosen to include Y2BaCuO5 (211) particles in the...
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Article
Ablation of polyimide (Kapton™) films by pulsed (ns) ultraviolet and infrared (9.17 μm) lasers
Ablation of the surface of a polyimide (Kapton™) film by single pulses of 248 nm or 308 nm radiation (∼20 ns) or 9.17 μm laser radiation (∼170 ns) was studied by photographing the emergence of the blast wave and ...
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Article
Photokinetic etching of polyethylene terephthalate films by continuous wave ultraviolet laser radiation
Continuous wave laser radiation from an argonion laser in the wavelength range 275–330 nm can be used to etch polyethylene terephthalate (PET) films with as little thermal damage as from a pulsed, ultraviolet ...
