Microwaves and plasma: on the origin of Ball lightning

Keit

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Just wanted to share the following research on the nature of ball lightning, unless it was already shared somewhere else, since the research was first mentioned in 2014, but then recently in June this year published in "Scientific Reports". Not sure if it is the full paper, but it has complicated images, formulas and all. ;)

Ball lightning, a fireball sometimes observed during lightnings, has remained unexplained. Here we present a comprehensive theory for the phenomenon: At the tip of a lightning stroke reaching the ground, a relativistic electron bunch can be produced, which in turn excites intense microwave radiation. The latter ionizes the local air and the radiation pressure evacuates the resulting plasma, forming a spherical plasma bubble that stably traps the radiation. This mechanism is verified by particle simulations. The many known properties of ball lightning, such as the occurrence site, relation to the lightning channels, appearance in aircraft, its shape, size, sound, spark, spectrum, motion, as well as the resulting injuries and damages, are also explained. Our theory suggests that ball lighting can be created in the laboratory or triggered during thunderstorms. Our results should be useful for lightning protection and aviation safety, as well as stimulate research interest in the relativistic regime of microwave physics.

Unfortunately, I definitely lack knowledge in order to assess if this theory is more valid than others.

Here's a news article about it:

http://earth-chronicles.com/science/a-new-hypothesis-on-the-origin-of-ball-lightning.html
A new hypothesis on the origin of Ball lightning

...In June, the Chinese scholar Hui-Chun Wu (Hui-Chun Wu) proposed a new, convincing explanation of this phenomenon by publishing an article in the journal Scientific Reports.

Some fireballs are the product of vital activity of living organisms. For example, the decomposition of living matter in a swampy area (or even mass graves in the forests of Poland) leads to the release of methane and phosphorous-containing gases such as posterolateral that can suddenly ignite when exposed to oxygen, resulting in a shimmering light spot hovering in the air. Other fireballs are electrical in nature, flaring up inside the earth during earthquakes, when the collision of the boulders is released the flow of electrons that rise to the surface where they interact with the air, creating flashes of light. But some fire balls formed in the atmosphere, usually during severe thunderstorms, and they are called fireballs.

Ball lightning can be any color of the rainbow and all different sizes — from a regular glass toy ball to large exercise balls on which people sometimes sit. They can build up inside enclosed spaces, down the chimney pipes and even penetrate through closed Windows. Besides the fact that they produce light, ball lightning can generate discharges and often emit a hiss or buzz, and a strong odor. Usually ball lightning exists in only a few seconds and burns with the intensity of a bright household light bulb. The unpredictable and volatile nature of ball lightning’s stopping to formulate a compelling theory to explain its nature, but reports of its strangeness has been for many centuries and continue to do today....

The penetration of ball lightning in houses and their ability to form inside of the aircraft was extremely difficult to explain. Explain how they are formed, even more diverse than their physical characteristics. For example, according to different theories, ball lightning may be a cloud of red-hot silicon particles, the natural nuclear reaction, an epileptic hallucination resulting from the effects of lightning, a miniature black hole, a compound of cellulose and other natural polymer filled with microwave bubble plasma.

Hypothesis microwave bubbles formed the basis of the work, a scientist from Zhejiang University in Hangzhou, China. Before, scientists assumed that such bubbles can form under the influence of microwave radiation storm clouds or atmospheric masers, however, Have put forward the hypothesis that these microwaves emanate from the electron beam that are accelerated to almost the speed of light when lightning strikes into the ground. These electrons are accelerated to speeds under the influence of the electric field that occurs when the flow of electrons moves in steps from the base of the cloud to the ground just before a bright flash of lightning. “The tip of the lightning flashes of the age of the earth, — writes, — can be formed a beam of electrons moving at relativistic speeds, which in turn generates intense microwave radiation”.

Regardless of the source, atmospheric microwave generate plasma, charging the surrounding air. This radiation has sufficient pressure to form from the diffuse plasma bubble, which we call ball lightning. Microwaves, which are inside the bubble, continues to generate a plasma and, thus, to maintain the bubble during his short life. In the end, the fireball fades, because the radiation inside the bubble dissipates. Sometimes the bubble breaks, the microwaves emerge, leading to the explosion.

The presence of microwaves and plasma as components of ball lightning may explain some of its properties. For example, microwaves can penetrate through window glass, so closed Windows do not interfere with the appearance of ball lightning in the room. Microwaves can also produce a noticeable sound at the time of their contact with the inner ear of a human, and the plasma, they generate, in turn, can produce oxygen from atmospheric ozone, having a pungent odor.

From other theories theory about the origin of the microwave ball lightning is different in that it explains how they appear inside the aircraft. Electrons, which are tiny relatives of atoms, capable of passing through the metal paneling of the body of the aircraft after they reached near-light speeds beyond, thanks to a flash of lightning. Then the electrons are trapped inside the plane, radiate microwaves which form a fireball. The sequence of the electron-microwave-plasma also explains the size of ball lightning, since the length of the electron beam, speeding under the influence of a lightning strike, with the typical diameter of the resulting microwave bubble is about 20-50 centimeters.

As is always the case with a new scientific hypothesis, you now need to do a lot of work to confirm the assumption the us will Need to conduct many experiments to test the mechanism of electron-microwave-plasma, resulting in the formation of ball lightning. It will be necessary to develop a method to generate ball lightning on demand, and then to study the characteristics of electrons and microwaves.

According to Wu, if the hypothesis is confirmed, his theory would put a few important issues related to threats generated by fast electrons and microwave radiation arising close to the people caught in the storm.
...
 
Hey Keit,

Funny you posted this as I just finished reading this SOTT article: https://www.sott.net/article/324205-Rare-ball-lightning-caught-on-video-in-Siberian-city

It shows a very fine specimen. :cool:
 
Keit said:
Just wanted to share the following research on the nature of ball lightning, unless it was already shared somewhere else, since the research was first mentioned in 2014, but then recently in June this year published in "Scientific Reports". Not sure if it is the full paper, but it has complicated images, formulas and all. ;)

Ball lightning, a fireball sometimes observed during lightnings, has remained unexplained. Here we present a comprehensive theory for the phenomenon: At the tip of a lightning stroke reaching the ground, a relativistic electron bunch can be produced, which in turn excites intense microwave radiation. The latter ionizes the local air and the radiation pressure evacuates the resulting plasma, forming a spherical plasma bubble that stably traps the radiation. This mechanism is verified by particle simulations. The many known properties of ball lightning, such as the occurrence site, relation to the lightning channels, appearance in aircraft, its shape, size, sound, spark, spectrum, motion, as well as the resulting injuries and damages, are also explained. Our theory suggests that ball lighting can be created in the laboratory or triggered during thunderstorms. Our results should be useful for lightning protection and aviation safety, as well as stimulate research interest in the relativistic regime of microwave physics.

Cool............. Thanks for sharing. Only seen the phenomena once.

But it was a sight to be hold.

 
Palinurus said:
Hey Keit,

Funny you posted this as I just finished reading this SOTT article: https://www.sott.net/article/324205-Rare-ball-lightning-caught-on-video-in-Siberian-city

It shows a very fine specimen. :cool:

You beat me to it! I was gonna post it here, it just seems to be walking gently and it even changes colors..:) super cool!
 
Fascinating. One example given in the paper reports the light emitted from the ball to be modulated by the nearby power line. So despite being a ball of highly destructive energy, it's still sensitive to external fields.

The plasma bubble forms around an extremely powerful standing wave which pushes electrons away from the center. This shell forms at the right size to become a resonant cavity that keeps the wave from flying out in all directions and dissipating into insignificance. So, like a self-perpetuating magnetron.
 
:whistle:
Huge Fireball Lightning Phenomenon Caught On Camera In Novosibirsk Region, Russia August 4, 2016
_http://ufosightingshotspot.blogspot.fr/2016/08/huge-fireball-lightning-phenomenon.html
Roman Tregubov, a graduate of the Novosibirsk State Technical University who lives outside Novosibirsk, Siberia's largest city in Russia, witnessed a huge mysterious white luminous sphere moving over a field before it disappeared into the woods.

Roman managed to capture the rare phenomenon and although the footage is shaky the sphere of light is clearly visible.

During the recording as heard on the commentary:

Female: “What’s that over there?”
Roman: “Fireball lightning”
Male: “Look, look what is that?”
Roman: “Argh, it’s moving away. It’s the first time I see one in my life. It's going to move away. I lost it. Where it is? There it is. I wonder if it'll blow off soon. Yep, it blew off.”
Roman: “This is the first time in my life.”
Female: 'Horror, hide away from it.”

Roman Tregubov explained to the siberiantimes he had to stand on bricks to get a view of the ball lightning over a fence and bushes, which is why the footage is shaky.
 
Hey c.a. and thanks for sharing.

Apparently you didn't notice that your article is exactly the same but from another source as the one SOTT carries, which I already linked to in Reply #1.
 
Palinurus said:
Hey c.a. and thanks for sharing.

Apparently you didn't notice that your article is exactly the same but from another source as the one SOTT carries, which I already linked to in Reply #1.

Thanks Palinurus for the heads up. Appreciate it. :)
 

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