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Chinese Glass Tubes - Fact or Fiction

PostPosted: Wed Mar 31, 2010 12:36 am
by Ben
There is a lot of talk online about the internal coolant flow in these Chinese tubes and I just wanted to separate fact from fiction.

A user on cnczone mentioned that there is metal (I believe they said aluminum) in the tubes which actually comes into contact with the liquid coolant. I don’t see how this can be true as the coolant would then become charged with 22KV.

Someone on CNCZone said that the beam actually passes through the coolant briefly; now this just seems crazy to me. I can’t find any places where the laser beam would actually pass through the coolant.


Again, I don’t believe either of these is true but I figured I would ask just to make sure I’m not missing something.

Re: Chinese Glass Tubes - Fact or Fiction

PostPosted: Wed Mar 31, 2010 2:10 am
by lasersafe1
No, the anode and cathode do not touch the liquid in the Chinese tubes.

Re: Chinese Glass Tubes - Fact or Fiction

PostPosted: Wed Mar 31, 2010 3:58 pm
by bdring
The coolant can't pass through water or probably any other liquid. I always wanted to see what happen, so I tried it.
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Not very exiting, but you can see all energy is dissipated right at the top. about 30 Watts, slightly defocused.

Re: Chinese Glass Tubes - Fact or Fiction

PostPosted: Sun Apr 04, 2010 5:57 pm
by Ben
lasersafe1 wrote:No, the anode and cathode do not touch the liquid in the Chinese tubes.


This is good news as the vast majority of the radiators I have on hand are copper.

bdring wrote:The coolant can't pass through water or probably any other liquid. I always wanted to see what happen, so I tried it.

Not very exiting, but you can see all energy is dissipated right at the top. about 30 Watts, slightly defocused.



PERFECT! I had theorized that the water would absorb the energy from the beam.