Solar and Laboratory Plasmas - video series.

Thanks Alan Smith , Donald Scott is really didactic and easy to follow here.

Reading this video is disappointing: not only does it promote the childish “electric sun” theory that denies Fusion in the hearts of stars, but it contains errors:

What separates the arc regime from the glow discharge regime is not the energy of the positive ions, but the fact that during the arc regime, the (total) energy of the discharge (and not the boltzmanian energy of the ions) substantially alters the properties of the electrodes, and the material of the electrodes participates in the discharge.

In this, the bolts of thunder are not arc discharges, but spark discharges. In the same way, the fires of Saint-Elme are not arcs, but effluvia, (regime of sparks)

But hey, this video is interesting because it shows that more than three centuries after the first experimentsof "electric eggs" in Abbé Nollet's salon, the phenomena that take place in a rarefied gas tube are still poorly understood.

There is no simulation program which makes it possible to find, according to the voltage and the pressure, the classic striation which streaks the interior of a rarefied gas tube (Dark space of Crookes, cathodic light, ect…, ect …)

This is reassuring for experimenters like us, because we have the most advanced simulation program: our real universe.

Photo attached: I had demonstrated in my vacuum chamber the reality of the Viton-Petit effect of confinement of an MHD discharge against a wall.

lenr-forum.com/attachment/24545/

Jean-Pierre Petit, in France, and Paul Murad and John Brandenburg, in the USA were the first to propose using an "MHD bypass" (outside Russia) to slow down the hypersonic air entering the engine and then accelerate the burnt gases leaving the engine.

But the main interest of the MHD thruster is a parietal use, because it allows to annihilate the hypersonic shock wave. And without using the Viton-Petit effect, it is not possible to use a parietal MHD motor, either in the air or in the depths of the ocean.

There is no aircraft deployed in a squadron using the bypass, because the technical challenges to be met are still too great, but MHD control surfaces are probably used on maneuvering hypersonic reentry bodies of the Avangard type.