Do two parallel electron beams attract?

Um. Yes! I had forgotten about Z-pinch in plasmas. Obviously there is something going on here that needs some thought. The current in a plasma actually DOES produce a self-focusing effect! Of course it's not particularly stable much to the dismay of the early fusion people, but that is of no consequence to the discussion here.

So what we observe so far seems to be:

1. electrons in a beam do NOT self-focus. This implies that the magnetic field is moving with the electrons so that a reference frame attached to the electrons won't see any anomalous magnetic fields arising from electrons that appear to be at rest.

1. A MIXTURE of positive (ions) and negative (electrons) in a plasma DO self-focus. This somehow implies that the magnetic field generated by current through the plasma is able to act back upon that plasma to compress it.

2. A MIXTURE of positive (protons) and negative (electrons) charges in a WIRE also are able to create a magnetic field which apparently is not moving at the velocity of the basic charged particles. If wires were like hollow tubes which electrons fired down then wires carrying current would NOT attract! As it is, we know that electrons in metals are bouncing around in there like mad and only move forward with a drift velocity. Somehow this fact allows magnetic motional forces to exist between the wires. And indeed I believe that there are observed "self-focusing" effects of a sort which is the current distributions found in heavy current DC bus bars due to the internal magnetic fields.

Therefore it seems to me that there are two situations here. One is the pure case of electron beams and the other are the cases of charged particles bouncing around in a mix in plasmas and inside wires. Methinks there could be some fundamental physics here!

Good point, Szczepan!

Benj

cylindrical

(pole to pole), does its magnetic field also spin? We cannot observe effects of induction from the spinning field.

Answer, A barmagnet has a magnetic field from pole to pole. This is a wysiwyg approach with much observible action at a distance phenomina. BUT lets explore the magnet a bit. he magnet has more attributes than a magnetic field. Ampere tells us it has an electrical field which is tangential to the bar and as you view the magnet, the clockwise or ccw direction of the electrical field is the determination of whether we view the north or south magnetic pole. The classical experiment of placing a barmagnet near a crt screen and observing effects on the cxrt electron beam clearly demonstrates his point and shows how any charged partical in motion has its inertia redirected by the Amperian dynamic electrical field. A simple case of the charged partical seeking a path of least resistance. In this scenerio there is no magnetic field, and it is not observed, however The Amperian dynamic electrical field is shown to be capable of action at a distance.

When magnets attract or repell it is this re-direction of inertia of the magnets responding to each others Amperian dynamic electrical field which we think of as a contiguous force but it doesnot span the gap, only the Amperian dynamic electrical field spans the gap.

If you spin the bar magnet and try to observe induction, you cannot because you are really spinning the Amperian dynamic electrical field which is already tangentially aligned but radially propagated in a avalanch propagation.

While two magnetics use redirection of inertia as a cause and effect mechanism, Curved Amperian dynamic electrical fields are employed. Redirection of inertia is also the mechanism of gravitation but without the curving of the Amperian dynamic electrical field. Kind regards, Lee Pugh

Uzytkownik "Benj" napisal w wiadomosci news: snipped-for-privacy@n2g2000hse.googlegroups.com...

It seems that electrons in a beam behave according to the current density. See the pages 18 and 19 (Alfven current) of::

It should be also density dependent.

".. heavy current DC" = The current density which give a noticeable effect.

I try to be constructive. S*