<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>I don't understand where they are avoiding it. The paper is referring to a helical magnetic field. </DIV></p><p>It's not a "magnetic" field, it's an *ELECTRO*magnetic field. These folks always oversimplify everything to a "magnetic" viewpoint, even in light plasma, where you *cannot* do that! By treating plasma as though it is a superconductor rather than just an ordinary conductor, and by claiming plasma is "frozen", they attempt to describe plasma's elecrical behaviors as "magnetic" events. They are not "magnetic" fields, they are *electromagnetic* fields. The word "electricity" is the forbidden topic.</p><p>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Isn't the helical structure just one of many examples of a Birkeland Current?</DIV></p><p>Yes. Why didn't they mention the term "Birkeland current" then? Why does your industry always leave out the current flow aspect of these "fields"?</p><p>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>If I were to write a detailed scientific paper about a specific species of tiger, I wouldn't refer to them as felines throughout the paper without mentioning what species of tiger I was discussing. I probably wouldn't even waste my time mentioning they belong to the Felidae family of cats. I would just assume they know they belong to the cat family. I would assume when I'm writing about a helical magnetic field, the readers of the paper are already familiar with Birkeland Currents. <br /> Posted by derekmcd</DIV></p><p>Sorry, but that doesn't fly when your industry repeatedly treats plasma as though it is a solid superconductor that carries no current, rather than a moving "good conductor" of flowing plasma columns. I guess it's easier to mathematically model plasma as *if* it was a superconductor, but it's not. It's never a superconductor, so you can't set one side of these eqwuations to 0, ever, not in the real world. You certainly can't apply this stuff to solar physics. Your industry doesn't actually understand the physics of what is occuring inside the plasma, and they don't understand electrical theory at all. It's a dangerous combination. They therefore begin with false assumptions (plasma is a perfect and "frozen" conductor), and they carry those false assumptions right through their mathemaical presentation. Let me demonsrate what I mean:</p><p>
http://www.bautforum.com/against-mainstream/74950-frozen-magnetic-field-lines.html</p><p>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>tusenfem<br /> <strong>E</strong> + <strong>v</strong> x <strong>B</strong> = η <strong>J</strong><br /> <br /> This says that the current density <strong>J</strong> is dependent on the electric field E and the velocity of the plasma and the magnetic field in the plasma. A moving or changing magnetic field generates an electric field, this is how the dynamo on your bicycle works. Here η is the resistivity of the plasma. You see that, if the plasma is very conducting then the value of η is very very small and the right hand term of the equation is negligible and we end up with: <br /> <br /> <strong>E</strong> + <strong>v</strong> x <strong>B</strong> = 0<br /> <br /> This is the "frozen in condition" as found by Alfvén. If the above holds, then you have to do some math here which I will only describe here in words. Take a surface that consists of magnetic field lines, and so that all the field lines lie in that surface. Then you move this surface with the flow and because of the flow the surface can have changed. However, because of the condition above, you will find that still all field lines are in that surface, non of them has suddenly obtained a direction perpendicular to that surface. This means that the magnetic field moves along with the flow of the plasma and thus can be said to be frozen in.</DIV></p><p>Thie explanation clearly demonstrates exactly why your industry is having so much trouble, and why it's so confused. I don't know who tusenfem is, but evidently he understand ths math behind MHD theory really well, but he doesn't understand properties of plasma at all. Plasma is not a "perfect" conductor of electrical current. n will never be zero. J will always exist in the real world. In the real world of plasma physics, plasma is not a superconductor, and it moves around freely. It's not a solid. It's not ever 'frozen'. This is the criitical mistake your industry in making today and has been making for more than 30 years. Alfven clearly explains this point in the opening chapters of his book "Cosmic Plasma". Since your industry never seems to bother to take any electrical theory classes (where magnetic fields form full continuums), and they collectively never seem to have ever read any of Alfven's books (No astronomer I've met yet has read one before our conversations began) , they just don't get it. They keep *assuming* something that is not true, and then they apply endless amounts of math to a ridiculacely false belief. tusenfem is a wealth of misinformation in this thread. You'll notice that the reaction to these basic questions is hostile and adversarial even though this individual made it clear they were looking for help:</p><p>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Well, this clearly shows you just jump into plasma physics without even knowing the basics.<br /> <br /> Any charged particle with a velocity <strong>v</strong> in a magnetic field <strong>B</strong> will experience a Lorentz force <strong>F</strong><sub>L</sub> = - <strong>v</strong> × <strong>B</strong>, which means perpendicular to the velocity and to the field. And thus this charged particle will start to gyrate around the field with the cyclotron frequency f<sub>c,a</sub> = q B / m<sub>a</sub> where a stands for the species of ion/electron you are looking at.<br /> <br /> Thus the particle will gyrate around the field line and the aligned component of the velocity will let the gyration center move along the magnetic field line.<br /> <br /> Now get thee to a library and pick up a plasma physics book.<br /> <br /> I will let <strong>korjik</strong> comment on the rest of the <strong>nonsense</strong> you are writing.</DIV></p><p>Notice the strong arm tactics when this person asked few logical questions? The only "nonsense" going on in that thread is all the misinformation that is being shoved down rgclinsk's throat. Tsuenfem literally "pretended" to understand this topic (know the basics), but he/she blew the most basic and critical issue there is as it relates to the properties of plasma. Plasma is NEVER a perfect conductor, J is always going to exist. Any movement of electrons *will* cause the magnetic fields in the flat plane he describes to change shape an go vertical from one instant to the next, and a Birkeland current will form in the thread as a result. Every statement tsenfem made about "magnetic reconnection" was absolutely false and misleading, and everything about his pompus attitude stinks to high heaven. Anyone who knows MHD theory any better and might refute this "nonsense" is banned, and this misinformation and brainwashing continues! Gah! Your industry is intentionlly misinforming the public on the "basics" of plasma physics, and attempts to force that misinformation on people by brute force and personal intimidation. That's unacceptable. </p> <div class="Discussion_UserSignature">
It seems to be a natural consequence of our points of view to assume that the whole of space is filled with electrons and flying electric ions of all kinds. - Kristian Birkeland </div>