• A Shyam

      Articles written in Pramana – Journal of Physics

    • Ignition and increase in Pease limit on current in an ohmically heated high densityZ-pinch

      A Shyam V Chitra M Srinivasan

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      Energetics of an ohmically heated deuterium-tritium high densityZ-pinch has been computed taking into account the energy deposited by the alpha particles produced by fusion. As a result, at higher plasma densities (>1027/m3) and temperatures (>4keV), the pinch current can cross Pease limit and the plasma can get ignited, yielding higher energy gain and neutron yield in a shorter confinement time.

    • Delayed hot spots in a low energy plasma focus

      R K Rout A Shyam

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      In a low energy Mather-type plasma focus device, hot spots having temperature in the range of few KeV have been observed even 1 µs after the pinch disintegration and in regions away from the pinch area. These hot spots are perhaps created by the thermal runway due to temperature fluctuations in the background gas.

    • Absence of neutron emission during interaction of deuterium with metal at low energies

      A Shyam T C Kaushik

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      Technique and instrumentation to detect reliably, multiplicity of neutrons emitted in sharp bursts (≤100 µs) has been developed where a burst of as low as 15 neutrons and continuous emission of ⋍10−1 neutron/s may be detected. Using this technique, attempts were made to detect neutron emission from various experiments in which anomalous nuclear effects (or what is commonly referred to as cold fusion) may be expected to occur. No neutrons, above our detection threshold, were detected in the recent series of experiments.

    • Operation of a capacitor bank for plasma metal forming

      P Sarkar S Chaturvedi Raj Kumar Rajesh Kumar D Lathi A Shyam J Sonara

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      Previously metal forming has been done using electromagnet in pulsed power mode, better known as magneform [1]. Here we will be presenting a different technique for metal forming. We are using water as a medium for this process. By discharging the stored electrical energy of the capacitor bank in water, we are getting the desired result i.e. to form (expand or compress) a wide range of workpiece to the desired shapes. The advantage of this method over conventional method is that it uses low power (negligible running cost). It does not require any post assembly cleaning degreasing and is hence environmentally ‘friendly’.

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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