Solenoid to fire magnetic ball, question about best core material)

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Discussion Overview

The discussion revolves around the use of different core materials in a solenoid designed to fire a magnetic ball or magnetized piston. Participants explore the implications of using soft iron versus copper as core materials, focusing on efficiency and performance in the context of electromagnetic propulsion.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant questions whether a soft iron tube core would enhance performance compared to a thin copper tube, aiming for increased efficiency in firing the magnetic ball.
  • Another participant points out that an iron core would prevent the ball from passing through the solenoid, leading to confusion about the design.
  • Clarifications are made regarding the intention to fire a magnet rather than a metal ball, which shifts the focus of the discussion.
  • Some participants suggest that any core material that does not significantly absorb the magnetic field could improve performance.
  • There is a discussion about whether the solenoid would need progressive fields activated by the magnet's position, with one participant proposing the idea of using ferric triggers for propulsion.
  • Concerns are raised about the dynamics of a rolling magnet and the potential need for stabilization mechanisms during propulsion.
  • One participant explains that the shielding effect occurs when iron gathers magnetic field lines, which could impact the performance of the solenoid with a magnetic piston.
  • Another participant suggests that a timer could be used instead of triggers in the design of a linear accelerator.

Areas of Agreement / Disagreement

Participants express differing views on the effectiveness of various core materials and the mechanics of firing a magnetized piston, indicating that multiple competing perspectives remain unresolved.

Contextual Notes

Participants have not fully clarified the assumptions regarding the design of the solenoid and the specific characteristics of the magnetic ball or piston being used, leaving some aspects of the discussion open to interpretation.

d4rr3n
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So I want to fire a magnetic ball through a solenoid coil but want to know if core material can enhance the performance. Would wire wrapped around soft Iron tube core work better then say a thin copper tube?

The aim is to increase efficiency so less power needs to be used to fire the magnetic ball, and yes I know the ball would be attracted to the Iron.
 
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<puzzled> The iron core will stop the ball from going through the solenoid though.
 
d4rr3n said:
So I want to fire a magnetic ball through a solenoid coil but want to know if core material can enhance the performance. Would wire wrapped around soft Iron tube core work better then say a thin copper tube?

The aim is to increase efficiency so less power needs to be used to fire the magnetic ball, and yes I know the ball would be attracted to the Iron.

What is the context of your question? Why do you want to fire a metal ball?
 
Simon Bridge said:
<puzzled> The iron core will stop the ball from going through the solenoid though.

I clearly said it's a tube, an Iron tube.
 
berkeman said:
What is the context of your question? Why do you want to fire a metal ball?

I don't want to fire a metal ball, I want to fire a magnet
 
d4rr3n said:
I clearly said it's a tube, an Iron tube.
... fair enough: https://www.physicsforums.com/showthread.php?t=75339

What is the context of your question? Why do you want to fire a metal ball?
d4rr3n said:
I don't want to fire a metal ball, I want to fire a magnet
... OK then, What is the context of your question? Why do you want to fire a magnet?
 
Any material that does not hog the magnetic field will help.
 
Hog,you mean shield?

I know that in a standard solenoid an Iron core (tube) improves performance but a solenoid is accelerating an Iron piston, I'm wondering if its accelerating a magnetised piston will this change.
 
Would progressive fields activated by the magnet's position be used or is it one field? The magnet could activate the next propelling field by a ferric trigger. Spacing fields/triggers would take some work but that would be interesting. The dynamics of the unstable rolling magnet will be a problem with the pole being unlocked. Perhaps a sacrificial container jacket for ball on its ride up the pipe to stabilize the pole for magnetic field synch over progressive propulsion fields.
 
  • #10
"Hog" as in the iron gathers all the field lines like a partner hogs the blankets.
That's how the shielding effect happens and also how iron slugs help.
Having a megneic piston changes too many variables to comment - you'll have to do it and see.

homemade is talking about linear accelerator design - you don't need triggers though, just a timer.
I believe your original question has been answered.
 

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