Shanmugavelayutham K Sundaram

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Soon after it was discovered that intense laser pulses of nanosecond duration from a ruby laser could anneal the lattice of silicon, it was established that this so-called pulsed laser annealing is a thermal process. Although the radiation energy is transferred to the electrons, the electrons transfer their energy to the lattice on the timescale of the(More)
The conventional scouring process involving the harsh environment is slowly being replaced with environment friendly approach using enzymes. These enzymes remove the non cellulosic impurities present in the fabric. Such a process would enhance the absorbency of the fabric without appreciable strength loss and also would help in the proper dyeing and(More)
Molten glass characteristics of temperature, resistivity, and viscosity can be monitored reliably in the high temperature and chemically corrosive environment of nuclear waste glass melters using millimeter-wave sensor technology. Millimeter-waves are ideally suited for such measurements because they are long enough to penetrate optically unclear(More)
Transmittance measurements on various single crystal ferroelectric and dielectric materials, BaTiO<sub>3</sub>, SrTiO<sub>3</sub>, LiNbO<sub>3</sub>, LiTaO<sub>3</sub>, (PbMg<sub>1/3</sub>Nb<sub>2/3</sub>O<sub>3</sub>)0.73-(PbTiO<sub>3</sub>)0.27, LaAlO<sub>3</sub>, and Bi<sub>4</sub>Ge<sub>3</sub>O<sub>12</sub>,, over a broad millimeter-wave (MMW)(More)
Introduction The vitrification of nuclear waste in joule-heated melters is a costly multi-decade national effort. Current operations at the Defense Waste Processing Facility (DWPF) and future operations at the Waste Treatment Plant (WTP), now under construction at Hanford, rely on predictive models because of the lack of on-line monitoring of most(More)
Millimeter-wave thermal analysis instrumentation is being developed for characterization of high temperature materials required for diverse fuel and structural needs in extreme high temperature reactor environments. A two-receiver 137 GHz system with orthogonal polarizations for anisotropic properties resolution has been implemented at MIT and is being(More)
Millimeter waves are ideally suited for sensing and diagnosing materials, devices, and processes that are broadly important to energy, environment, and national security. Thermal return reflection (TRR) techniques that detect and use thermal emission as a probe to diagnose materials and systems make possible accurate noncontact thermal analysis measurements(More)
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