This is what I wrote in my previous post:

In the illustration, that magnetized direction is in the center (centre if you are Canadian) of the solenoid, so bottom to top.

So yes, the field is VERTICAL and the windings are horizontal.

The "poles" are on the top and bottom, not on the sides as you are illustrating.

Here is a video update of the Triple M Super build progress

Link to video: https://www.youtube.com/watch?v=4a-dCwn-d0s

Stay tuned

Luc

Hi poynt

thanks for your post.

The term Bloch wall, I thought it meant the Neutral point between two magnetic poles and that's what I was using the word as.
If that is not correct, then I have no problem calling it the Poles Neutral Zone if that's a better way to describe it.

In the illustration of the solenoid magnetic field you posted, we can see -> arrows going in different directions. Do these arrows represent a pole direction?

I assume the the fine black rectangle line is the outside of the solenoid coil?... is that correct?

Luc

You are correct Luc... according to wiki...


"A Bloch wall is a narrow transition region at the boundary between magnetic domains, over which the magnetization changes from its value in one domain to that in the next, named after the physicist Felix Bloch.


Ron

Hi all,

Maybe all that you are discussing is what Howard Johnson demostrated by experimental tests in his book "The Secret World of Magnets". He states, and measured with a Hall probe, that the lines of force do not move from one pole to the other but they move from one pole to the center point, forming a double vortex.

Please see the attached picture from his book.

Regards

Luc indicated 4 block walls, my sketch indicates there are actually 8


The core makes no difference


The following photos show exactly what my sketch indicated


Ron

What you're seeing there is the result of the net flux passing through the Hall sensor. Null readings do not indicate the presence of a Bloch wall, they are simply indications that the Hall sensor is in a location where the flux passing through it from the front to back is equal to the flux passing through it back to front, for a net sum of 0.

Just to reiterate, Bloch walls can only be present in a ferromagnetic material that inherently contains magnetic domains. There are no such magnetic domains present in air or copper, or anything non-ferromagnetic for that matter.

In the mean time this is not an engineers forum,
rather a hobbiest/hands on experimenter group where the transition between two opposite poles is
commonly referred to as the bloch wall... lets keep it simple and on track.

That would be a very foolish thing to do.  Why play with magnets for years and not even understand how magnetic fields work?  Hobbyists and experimenters work with exactly the same materials and circuits that engineers work with.

Please just work on trying to understand what Poynt is saying.  Your keyboard can take you to a thousand web sites if you need more information.  Without understanding what you are doing and what is happening, you are just keeping yourself in darkness and ignorance.  It's definitely not what you want to do.

Bloch walls, how coils work, how capacitors work, how electric circuits work, how to make proper measurements, and so on form the basic building blocks of understanding and working with electronics.   Even your phrase, "the transition between two opposite poles" doesn't really and truly make sense.  You would never hear anybody state that outside of the forums.  The challenge for you is to understand why there are problems with that statement.  It's all part of the learning process.

I read the past 20 to 30 posts and i_ron, you are simply wrong.  So either you really and truly try to learn, or if not then you will be stuck in a murky dark world of ignorance.

I am stating this with some force, because I see you push back with some force, and you are wrong.