Quote:
Originally Posted by Jarvamundo
the model is this:
Scott says: “As I see it, [variable] binaries operate generally as follows: Each of the stars has an electrical capacitance. These two capacitances are permanently connected by a plasma (cloud). This plasma exhibits (as do all plasmas) a non-linear resistance. If one of the stars charges up to a high enough voltage ... , then the plasma will go into the arc mode and emit brilliant light, perhaps x-rays and gamma-rays. Electrical energy will be transferred from the first capacitor (star) to the other. It doesn't make any difference which star is bigger.
“The "bridge" between the two stars probably doesn't go away. After the arc discharge is over (the voltage difference between the two capacitors is dissipated), the plasma bridge goes back into its normal glow or dark current mode and waits for the next discharge.”
now is this oscillation linked to mechanics... interesting question bojan, i feel capacities of the bodies and distance and available plasma to be the dominant variables.
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This, as described doesn't look like the oscillator to me at all
This guy tried to describe something analogous to oscillator with negative impedance.. but I can't see the mechanism of it at all. How does it work?
To be able to use plasma in oscillator, couple of conditions must be satisfied (mathematics!)
- there must be present a resonant circuit capable of turning the phase of the signal by 180°. That means, you have to have inductance and capacitance in the circuit. If only one of those are present, there are no conditions to start and maintain oscillations (mathematics again, sorry..)
Also, the size of the circuit must be much smaller than the wavelength of the oscillations. Otherwise, the oscillator becomes much more complicated, with distributed parameters - meaning the oscillation frequency (if the conditions for oscillations ate met at all) becomes dependent of the physical size of the system.
- there must be present the suitable source of the energy (OK, lets say there is.. but how does it work?
Now, the "terrestrial" model of this type of oscillator was realised a long time ago by Heinrich Hertz (in his time there were no valves yet, so he used spark as active element - negative impedance) in his circuit to generate short bursts of oscillations..
Tesla used the same for his high voltage experiments.
However, this is not a pulsar. The size of double star system would suggests oscillations with fundamental periods in the range of minutes to
hours - VERY long wavelengths.. not easy to detect at all.
The sparking itself was NOT part of the oscillator - it only provided the very short duration plasma cloud which behaved like negative impedance, but it lasted long enough compared to the period of oscillations (they were in GHz band), so the relatively narrow-band waves of sufficient duration were radiated from his contraption and detected couple of metres away by another resonant circuit.
Also, plasma will have negative impedance ONLY at certain current density, and ONLY immediately before it is becoming plasma - when the current increase is causing the voltage to drop. and this is happening in a moment of spark formation (when ionisation is starting, forming plasma out of neutral, high-density, isolation medium like air at normal atmospheric pressure).
Nope.. the cosmic version of this doesn't look plausible at all.