I've given a HeNe Laser tube
I have no experience with lasers and don't know how to connect the tube
Now a few questions for you:
What is about the operating voltage and current?
Needs the tube DC or RF?
If yes where is + and -? testing jobs
What is the best suitable as HV power supply? Zeilentafo cascade obit. Who needs with approx. 10-15kV DC ignition pulse, burn tuht se then with about 1-2kV best you take a small ferritHV transformer and do a cascade behind it. And a resistance power! The current must be limited! As part of the power an AC transformer with a downstream cascade of TV and ballast resistor particularly suitable. The cascade behaves after the ignition as a normal rectifier, so the voltage that falls down on the ballast resistors, is relatively small, reducing slightly the dissipation of the limiting resistors (as well the number of resistors and their performance).
How much should the opposition actually be? I wanted that soon even nen HeNE buy... so 10kOhm? That depends of course on the output voltage of the power supply and the voltage or the current demands of the tube on it. 60 100kOhm are so common, however related to the venal power supplies. With a DST had to I connect in my previous attempts 10 resistors à per 68kOm (11W) in series with a 680kOhm resistance, to operate my small 1mW JDSU tube. I was also a little too much power behind the whole ;) Best to measure the power against earth (Earth!) with a multimeter or better yet an analog mA meter. A small tube, just as mean, needs about 1-2mA. Argon would be really great! Unfortunately, no vacuum pump available is me, otherwise I'd him to me (also HeNe and O m³ +) build! H Yes, the book of the Rapp. Which are actually very simple to build, if you needed a 12V pump and the gas has. The gas not sooo much would the issue just the pump. The problem with self construction lasers is unfortunately, remains that relatively much gas comes out the glass of the Röre (in the Interior) and thus the vacuum in the long term not so much. Otherwise I would have said, I go to school, because the ham a real good pump (about 3 * 10 ^-4mBar). Then I would be as time hingegeangen, the tube would have evacuated to melted and that's it then. But that is not so easy with self construction lasers Yes unfortunately. Clearly, you can short-circuit the cascade. The voltage doesn't really matter in a current measurement. Digital instruments you should only watch, that under high-voltage circuits are, therefore the measurement from the cathode to the minus pole earthed.
The container in the laser secondary testing tube is the anode to the cathode and the beam exit.
1MOhm is a bit much for a 10mW should be enough tube, 100kOhm at some kV from the transformer. The cascade only at small load multiplied the voltage, so at the start, otherwise the (under large load), it behaves like a normal rectifier. You have to keep in mind so the output voltage of the Zeiletrafos and not that of the cascade. You should select the input power also sufficiently high.
