Deuterium UV Lamp Test [FAIL] and Theory
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- Опубліковано 31 лип 2024
- This is a short walk-through on deuterium UV lamp theory and a test of the lamp in operation from its rather special power supply. PSU failed. Lamp failed. Complete fail. The lamp comes from the teardown of a Hitachi L7450 HPLC Diode-Array-Detector ( • Hitachi L7450 HPLC Dio... ). HPLC is short for High Performance Liquid Chromatography. The DAD uses UV light to detect a color spectrum through a liquid flow cell into a linear detector.
Light spectrum image source: en.wikipedia.org/wiki/Visible...
Deuterium lamp spectrum source: en.wikipedia.org/wiki/Deuteri...
Pictures and additional information: kaizerpowerelectronics.dk/tea...
Discussion of teardown: highvoltageforum.net/index.ph...
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#electronicscreators #electronics #laboratory #teardown - Наука та технологія
Original teardown and all pictures from that: kaizerpowerelectronics.dk/teardown/hitachi-l7450-hplc-diode-array-detector-teardown/
Plot twist: The switch is defective, the lamp is fine.
Just double checked the switch, its fine. But would have been THE plot twist.
Don't despair. I specialise in failed projects
Do you have other deuterium lamps in your parts bins?
No :(
@@KaizerPowerElectronicsDk If you want I could send you one, I find them from time to time at a specific recycling bin I frequent...
I like the simple solution you came up with for testing the lamp. I have a deuterium lamp lying around also and may emulate your method to test that one!
Well, since it's already broken.. maybe you could get it to start with a classic fluorescent tube igniter circuit. Should do plenty of voltage without too much risk of it blowing up.
Anyway, it was interesting nonetheless.
Failures add value, It teaches what not to do.
We learn a lot :)
I still think it was a cool video! we gotta make it glow somehow, even if it is just orange from the air!
anyway a good and informativ video!
I stilled a lot! Thank you 👍
UV blue balls :(. But I understand the lesson here and grateful for the reality check. 👍
Cool
Try using a hv spark to ignite since it's probably busted anyway.
Violenty igniting heavy hydrogen was not on my wish list that day :)
@@KaizerPowerElectronicsDk - For deuterium and tritium, the optimal reaction rates occur at temperatures higher than 100 million °C
It would be interesting if you could beat ITER on fusion, but it's better overall to avoid ionizing UV radiation; equipment such as plastics also gets damaged, it's not 'only' your eyes and skin :ø)
You could use one of your small Tesla Coils to check the gas condition. It may be possible to use the technique to start the lamp too. Although I think you are probably right as the lamps should at least try and start with the pulse from the cap. I think I used a higher ignition voltage (approx. 1kV) from a smaller capacitor.
That was a great idea to excite it from a HF field from a Tesla coil. I can still try that out. Not going for higher voltage was mostly based on the original power supply, as it was specified for a 325V pulse for just mere 1us.
@@KaizerPowerElectronicsDk Good point not to have too high an energy pulse to start. Sometime in old eol lamps where the cathode work function is poor a higher pulse voltage can coax a it to start.
@@KaizerPowerElectronicsDk One problem i have noticed with deuterium lamps is that, as the lamps age, the starting voltage required to get it going does increase. I have one instrument that now only starts when i put it behind a variac, to provide it with at least 240+ VAC (raising the voltage on the starter winding above 400v) but it still provides useful output once it gets going.
@@chuckvanderbildt Thanks for the suggestion. I will try with a step up transformer.
@@KaizerPowerElectronicsDk Tig welder with HF start laying around? Either way, stay safe (as usual)! :) :)