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Old 02-08-2012, 04:05 AM #17
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Default Re: Can anyone tell me what this is or how to make it work

For the second tube, what color do you see when looking down the bore? Placing a plasma ball next to it (or otherwise exciting the gas) will also give a hint. I almost want to say HeNe.


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Old 02-08-2012, 04:18 AM #18
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Default Re: Can anyone tell me what this is or how to make it work

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Originally Posted by Polonium210 View Post
The proper googles would protect for the laser wavelength. Co2 is around 10600nm=10.6um.

Your asking if the tube is refillable? It would take skill and some expensive equipment that you probably don't have access to. If you found a place that refills Co2 lasers it would cost you as much as a new tube.

You say your an EE student? You can power it from a ZVS driver. I power my tube from a homemade ZVS flyback driver. This works perfect as a large color TV flybacks are rectified output.
Yes, polycarbonate safety glasses are nearly completely absorptive at 10.6um. Most, if not all goggle specifically for CO2 are just overpriced safety glasses.

Actually, polycarbonate, glass and acrylic lenses are all almost completely opaque to 10.6um.

The cornea of the eye is actually opaque to this wavelength. The chances of retina damage are small as the 10.6um radiation would have to burn through the cornea first. I dont think anyone is going to hold their eye in front of a CO2 beam long enough for that to happen.

Most of the protection dealing with CO2 is radiated heat related. Meaning, the incandescence of materials put off during heating to such temperatures of various object, can do damage to the eye. That means the bright glowing white spot you will see on the rock your going to try to melt, can burn your retina , just like looking at the sun.

However, glasses MUST be worn!!


Quote:
Originally Posted by Cyparagon View Post
For the second tube, what color do you see when looking down the bore? Placing a plasma ball next to it (or otherwise exciting the gas) will also give a hint. I almost want to say HeNe.
Yea, the ceramic looking, what appears to be a dielectric tube down the center of the bore is throwing me off a bit.

If its HeNe, its a bad a$$ HeNe, and I want one!! I want it anyway, it look cool!!
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Old 02-08-2012, 04:28 AM #19
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Default Re: Can anyone tell me what this is or how to make it work

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Originally Posted by Sputnik77 View Post
Yes, polycarbonate safety glasses are nearly completely absorptive at 10.6um. Most, if not all goggle specifically for CO2 are just overpriced safety glasses.

Actually, polycarbonate, glass and acrylic lenses are all almost completely opaque to 10.6um.

The cornea of the eye is actually opaque to this wavelength. The chances of retina damage are small as the 10.6um radiation would have to burn through the cornea first. I dont think anyone is going to hold their eye in front of a CO2 beam long enough for that to happen.

Most of the protection dealing with CO2 is radiated heat related. Meaning, the incandescence of materials put off during heating to such temperatures of various object, can do damage to the eye. That means the bright glowing white spot you will see on the rock your going to try to melt, can burn your retina , just like looking at the sun.

However, glasses MUST be worn!!




Yea, the ceramic looking, what appears to be a dielectric tube down the center of the bore is throwing me off a bit.

If its HeNe, its a bad a$$ HeNe, and I want one!! I want it anyway, it look cool!!
aren't the brewster s.p. ends made of glass? so if glass absorbs.....
but it looks clear down the center minus that yeah ceramic looking thing.
one came out of an engraver the other a etcher thing i believe from what i was told. not sure which is which
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Old 02-08-2012, 04:38 AM #20
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Default Re: Can anyone tell me what this is or how to make it work

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Originally Posted by 98Mystique2 View Post
aren't the brewster s.p. ends made of glass? so if glass absorbs.....
but it looks clear down the center minus that yeah ceramic looking thing.
one came out of an engraver the other a etcher thing i believe from what i was told. not sure which is which
I was referring to typical glass "glasses" lenses. You can look it up on Sams laser FAQ if you would like. I dont think anyone would argue with Sam!!

Ok, then its likely a CO2 as well then. The tube down the center may be something to help cool, or quench the plasma column.
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Old 02-08-2012, 09:11 PM #21
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Default Re: Can anyone tell me what this is or how to make it work

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Yea, the ceramic looking, what appears to be a dielectric tube down the center of the bore is throwing me off a bit.
Don't look AT the bore, look DOWN the bore. Look into the output aperture (where the laser beam would come out.) What do you see?
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Old 02-13-2012, 03:01 PM #22
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Default Re: Can anyone tell me what this is or how to make it work

Would you mind shooting a end on pic of the green trumpets.

If it is what I think it, is, I'm going to have a heart attack.

No one has made them in 30 years.

The one with the green trumpets is special.
Very rare.

The dual fill valve solenoids are a clue. No hene and few Co2 need fill valves, so that is most likely pulsed xenon or argon.

It is a pulsed laser, it needs driven from a big capacitor, its also missing the resonator and mirrors, so it will not lase. It will NOT run correctly off a neon transformer, which could MELT it.

I can tell from the end windows, which is why I need to see a end on shot.

Dont power up the fill valve coils either..

The other is a standard waveguide Co2 tube.

Steve

Last edited by LSRFAQ; 02-13-2012 at 03:09 PM.
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Old 02-13-2012, 03:08 PM #23
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Default Re: Can anyone tell me what this is or how to make it work

Pulsed xenon would be very rare indeed, and I've only once seen a pulsed argon, a ~2 meter long Spectra Physics one at the university.
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Old 02-13-2012, 06:45 PM #24
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Default Re: Can anyone tell me what this is or how to make it work

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Pulsed xenon would be very rare indeed, and I've only once seen a pulsed argon, a ~2 meter long Spectra Physics one at the university.
That may actually be correct!!!! The trigger coils are apparent as well!!
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Old 02-13-2012, 07:10 PM #25
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Default Re: Can anyone tell me what this is or how to make it work

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That may actually be correct!!!! The trigger coils are apparent as well!!
With respect,

Those are NOT trigger coils, that is a refill system.

Pulsed lasers run at less then 20 microns pressure and burn gas by forcing it into the glass and electrodes.

Those are two solenoid valves with a small chamber in between them.

Fill sequence:
Open the first valve, it fills the chamber.
Close the first valve
Open the second valve, it ***** the chamber into the tube.
Immediatly close the second valve.

Wait 10-20 minutes for the gas to diffuse, check the tube voltage/power,
repeat as needed.
Do NOT overfill.

Very common on scientific and medical ion lasers that I work on.

We "Buzz" or "Bleep" the valves very quickly to limit flow.

Mainly because if two valves ever open at the same time, the tube is hosed unless you have it repumped. The fill resivoirs are usually at 760 Torr, and CW ion tubes are at .1 to .2 torr for larger tubes. Pulsed tubes are at a fraction of that.
So overfilling is very bad.

Steve

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Old 02-13-2012, 10:29 PM #26
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Default Re: Can anyone tell me what this is or how to make it work

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With respect,

Those are NOT trigger coils, that is a refill system.

Steve

With respect, the the item in red in the pic below is NOT a fill valve. It may not be a trigger, but its NOT a fill valve!!!

It looks like a start-up trigger due to its placement and "design", but I could be wrong.


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Can anyone tell me what this is or how to make it work-6839150573_1860942e9d_b.jpg  
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Old 02-14-2012, 01:03 AM #27
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Default Re: Can anyone tell me what this is or how to make it work

[QUOTE=Sputnik77;1030406]With respect, the the item in red in the pic below is NOT a fill valve. It may not be a trigger, but its NOT a fill valve!!!

It looks like a start-up trigger due to its placement and "design", but I could be wrong.

END QUOTE

That is a Klixon style overtemp sensor. Uses a bimetal thermal switch.



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Old 02-14-2012, 01:52 AM #28
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Default Re: Can anyone tell me what this is or how to make it work

[QUOTE=LSRFAQ;1030477]
Quote:
Originally Posted by Sputnik77 View Post
With respect, the the item in red in the pic below is NOT a fill valve. It may not be a trigger, but its NOT a fill valve!!!

It looks like a start-up trigger due to its placement and "design", but I could be wrong.

END QUOTE

That is a Klixon style overtemp sensor. Uses a bimetal thermal switch.



Steve
Ahh, makes sense!!
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