Can Accumulating Charges Be Increased by Placing Machines Underwater?

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Discussion Overview

The discussion revolves around the theoretical possibility of increasing the charge accumulation of high voltage machines by submerging them underwater, as opposed to their typical operation in air. Participants explore the implications of using water, its dielectric strength, and alternative environments like vacuum or gases.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant suggests that placing high voltage machines underwater could allow for greater charge accumulation due to water's higher dielectric strength compared to air, although they acknowledge practical limitations.
  • Another participant questions the necessity of using seawater, proposing distilled water instead, and mentions that while underwater operation could suppress sparks, practical challenges remain.
  • A participant notes that similar effects can be achieved using high-vacuum or SF6 gas in electrostatic particle accelerators, allowing for high terminal voltages.
  • There is a theoretical consideration about using solid materials, like glass, to suppress sparks, though concerns about the inner surface remain unaddressed.
  • One participant expresses confidence that the dielectric constant is the primary concern, reiterating that practical applications typically favor gases over liquids or solids.
  • Another participant humorously remarks on the impracticality of achieving a perfect vacuum, reinforcing the challenges discussed.

Areas of Agreement / Disagreement

Participants generally agree that while the theoretical exploration of underwater charge accumulation is interesting, practical implementations face significant challenges. Multiple competing views on the best medium for charge accumulation remain unresolved.

Contextual Notes

Limitations include the dependence on the dielectric properties of materials, unresolved practical considerations regarding the use of water versus gases, and the feasibility of achieving a perfect vacuum.

Axe199
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I was reading about high voltages machines that accumulate charges and i found out that we can't accumulate much , because eventually the voltage will break down the air near the surface of the sphere ( corona discharge) , what if we put it at the bottom of the sea , where water ( with bigger dielectric strength ) surround the sphere , wouldn't that allow us to accumulate more charge?
( this is a theoretical question , i know it won't work in reality because of the air inside the sphere and the salt in the water and many other reason)
 
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Why put it in the sea? Why not a nice pool of distilled water?:wink:

But sure, you could use it to suppress sparks. We could never use it in practise, for much the reasons you've outlined. Water is also heavy!

But! You can do the same trick with high-vacuum or SF6 gas. For example, in electrostatic particle accelerators, the accelerating tube is put inside a large tank of ~100 psi SF6 gas to suppress sparks. In that way, you can get terminal voltages up to 25 MV (the old Oak Ridge tandem accelerator, which I believe was the largest tandem accelerator every built) with ease.
 
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e.bar.goum said:
Why put it in the sea? Why not a nice pool of distilled water?:wink:

But sure, you could use it to suppress sparks. We could never use it in practise, for much the reasons you've outlined. Water is also heavy!

But! You can do the same trick with high-vacuum or SF6 gas. For example, in electrostatic particle accelerators, the accelerating tube is put inside a large tank of ~100 psi SF6 gas to suppress sparks. In that way, you can get terminal voltages up to 25 MV (the old Oak Ridge tandem accelerator, which I believe was the largest tandem accelerator every built) with ease.

do you think we can suppress the sparks with solid? like glass , we would have the same problem with the inner surface, but just theoretically.
 
... I don't see why not? I'm fairly sure it's just the dialetric constant you care about. Completely unfeasable in reality, though, as you point out, which is why gasses are used in practice (even nasty ones like SF6!).

If we're talking theoretically, the best choice would be a perfect vacuum.
 
but again , perfect vacuum is unfeasable , :D
thanks
 

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