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Re: [TCML] Off topic? Inductively-coupled N2 laser
JF
I mentored a college colleague about 10 years ago with a physics project.
He acquired a 10W CO2 medical laser (water cooled), so we brainstormed
options to power it. We decided rather then using a 15kV/30mA NST to build
a 600W VTTC based on (6) 6146 pentodes configured as a push pull X 3
parallel stages driving a resonator. Base of laser to ground passed through
a shunt resistor and voltage drop across resistor was passed through
an amplifier and used to adjust GLB (oscillator output).
After much monkeying around with gas mixtures and pressures (very
critical), was able to get tube to successfully lase, unfocused beam on
hand would create very warm spot about size of a dime. Video taped
(Thank GOD!) before laser tube water jacket ruptured next day. Got him
an A- for his senior physics project.
I have also seen multi-kilowatt CO2 lasers using arguably DRSSTC/SSTC
technology for driving the laser. Enough instantaneous power to rupture a
solid cinder block from thermal shock (I witnessed this first hand no BS).
As in small laser above; gas regeneration, recirculation, cooling, and
dynamic pressures are critical for proper system performance. This
technology is proprietary; and was seen in early 2000's.
Regards
Dave Sharpe, TCBOR/HEAS
Chesterfield, VA. USA
On Sat, Jan 7, 2012 at 4:52 PM, Simon <elmontare@xxxxxxxxx> wrote:
> Hi. Im an amateur coiler and happen to use a NTC 6axis laser for metal work. As far as i can gather the basics for its operation is high voltage being pulsed through a tube filled with a gas mixture reflected off several mirrors and focused through a lense. I believe the output is the same as a TC just at ultra high frequencies. So i dont know if you can really "use" a TC as a component for a laser or if a laser is basically just a TC with a different looking streamer.
>
> Im helping :)
>
>
> On Jan 7, 2012, at 11:59 AM, vatercox@xxxxxxx wrote:
>
>>
>>
>>
>> Dear List,
>>
>> With possible interest to coilers who are also into lasers I have noted some Russian research into inductively-pumped gas lasers, in relation to possible relation to tesla coils especially direct-coupled LC networks of the type mentioned previously on the List by ACMQ:
>> http://wzeu.ask.com/r?t=p&d=mys&s=ads&c=a&app=aoth&l=dis&o=100000027&sv=0a65292f&ip=5c05c292&id=AAEC8712D19CB4C069707DE3A4124D6D&q=inductive+n2+laser&p=1&qs=2871&ac=169&g=59efteoV1AHyG9&en=gs&io=0&ep=&eo=&b=a004&bc=&br=&tp=d&ec=1&pt=Nitrogen%2C%20atomic%20fluorine%20and%20CO2%20lasers%20excited%20by%20a%20pulsed%20inductive&ex=&url=&u=http%3A%2F%2F144.206.159.178%2FFT%2FCONF%2F16414109%2F16414111.pdf
>>
>> http://wzeu.ask.com/r?t=p&d=mys&s=ads&c=a&app=aoth&l=dis&o=100000027&sv=0a65292f&ip=5c05c292&id=2C144944B04BADD9611F8668F2AC419A&q=inductive+n2+laser&p=1&qs=2871&ac=169&g=5a09qiHsK31dvt&cu.wz=0&en=gs&io=0&ep=&eo=&b=a007&bc=&br=&tp=d&ec=1&pt=Gas%20lasers%20excited%20by%20a%20pulsed%20inductive%20discharge&ex=&url=&u=http%3A%2F%2Fperson.ipr.sci.am%2Fvm%2Fdocs%2FLO_2006_SPIE.pdf
>>
>> Is it possible to, use a TC to pump a laser i.e. by using a "lasing" gas e.g nitrogen to fill the inside the form of the secondary and with say, a mirror at one end of the a window at the other to allow the laser light to exit, the high voltage across initiating the discharge and the magnetic field sustaining it until the capacitors were discharged, the cycle then repaeting. Would it likely be a good opportunity for the amateur experimenter to make say a decent Nitrogen laser or is likely to be very challenging?
>>
>> JF Cox
>>
>>
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--
Dave Sharpe, TCBOR/HEAS
Chesterfield, VA USA
Sharpe's Axiom of Murphy's Law
"Physics trumps opinion!"
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