[Enriched version of the original presentation]
This short presentation introduces an experimental design for the enhancement of the anomalous thermal phenomena (AHE) observed since 2011 in Constantan3 wires exposed to a deuterium or hydrogen atmosphere, and heated by direct current. In fact, the occurrence of AHE requires specific conditions such as deuterium/protium absorption in the wire, sufficiently high temperature, as well as presence of strong non-equilibrium conditions such as those induced by thermal gradients, variations of pressure, and electric/magnetic fields. Previous experiments provided a strong evidence for the
role of a flux of active species through the wire or at the wire surface. Though various techniques to induce a flux were tested before, and have been instrumental for a phenomenological understanding of AHE occurrence, they could not provide a solution for a sustained and exploitable energy production. For instance, wires loaded with deuterium at 700 °C and 1 Bar, may show the occurrence of AHE when the pressure is slowly reduced to 1 mBar. During this process, anincrease of wires electric resistance is observed and corresponds to the out-gasing of deuterium or hydrogen; this
creates a flux associated with AHE. Nonetheless when the out-gasing ceases, the phenomenon tends to vanish. Similarly, simple knots along the wires, can be used to create hot-spots and corresponding thermal gradients; this approach proved quite effective and AHE could exceed 40% with respect to the electric input to heat the wires.
Notwithstanding, the method was affected by a cumbersome preparation of the wires and their frequent breaks. In 2016 a second non heated wire was positioned near the active hot Constantan and, at a sufficiently reduced pressure did reveal a thermionic emission of electrons from Constantan. The empiric correlation between this electron emission
and AHE occurrence was initially puzzling, but soon lead to experiments where the electron emission was enhanced by mean of an external power supply to sustain an active voltage bias among Constantan and the second wire (anode).
This approach also proved able to trigger AHE though not indefinitely. The next step was using an alternating current between the two wires, an approach which led to observe the occurrence of Paschen or dielectric barrier discharges (DBD) when voltage and pressure were in the appropriate range. Interestingly in presence of these discharges, we
recorded high and long lasting AHE as observed by other authors before. An intense scrutiny of the data collected from the experiments mentioned above led us to design an updated setup which could take into account the learning of almost ten years of Constantan wires studies. This setup includes the implementation of pulsed power
supply based on a previous concept used by some of the authors of this presentation in electrolytic experiments with palladium. This power supply configuration and overall circuitry, is capable of providing powerful negative pulses along the wire, and positive pulses among the wire and an iron tube anode on which the wire (insulated with a special
glass fiber sheath) is coiled. The positive pulses among the Constantan and the tube are used in particular to trigger Paschen or DBD discharges, while the tube can also be used as support for a multilayer coating of nickel-copper and low work-function oxides described in previous works.
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