3 ms·

Is it an actual x-ray? Do we want people to be firing these off in public?

vardump 7y ago
Yeah, at least his previous x-ray source looks like it could very well be real. Roughly matches designs of real machines I'm vaguely familiar with. I do wonder how they cool the tube head. If they don't do it at all, I don't think device lifetime will be that long. Luckily x-rays have pretty limited range. I think 5m/yd should be minimal safe distance. The further the better, of course.
- adammunich 7y ago
  Operation is actually rate limited by the anode's ability to store heat, not dissipate it. The electron beam heats up the anode far too fast to reasonably dissipate the energy continuously.
  - vardump 7y ago
    Ok, my knowledge about tube heads is rather superficial. I do know the devices I'm familiar with eventually require increasingly long cooldown periods.
    - adammunich 7y ago
      Yes, and in the US, interestingly enough those cool-down charts are actually required to be posted visibly on the machine by law.
    - AstralStorm 7y ago
      Which is why big medical x-ray machines have active liquid nitrogen cooling or solid co2, and also huge heatsinks.
grocid 7y ago
Judging for v1 [1] -- yes it is. And no we don't. That would be double-plus ungood. [1] https://adammunich.com/x-ray-machine/ https://adammunich.com/x-ray-machine/
aaron695 7y ago
> Do we want people to be firing these off in public? Once all 7 billion people have access to professionals then maybe we can ask this question? X-Rays were used for years to find peoples shoes size at shoes stores and no one was harmed. We have a lot more info on correct use now, so don't see the problem.... Other than amateurs need to do professionals job in this current world and the professional are commonly fighting back to stop the greater good to keep their wages high.
- deleted 7y ago
  [deleted]
- JetSpiegel 7y ago
  > no one was harmed Citation needed.
  - aeternum 7y ago
    It very likely did cause harm: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1963031/pdf/brmedj03132-0034.pdf https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1963031/pdf/brm... https://www.wisconsinmedicalsociety.org/_WMS/publications/wmj/pdf/106/5/275.pdf https://www.wisconsinmedicalsociety.org/_WMS/publications/wm...

Yeah, at least his previous x-ray source looks like it could very well be real. Roughly matches designs of real machines I'm vaguely familiar with. I do wonder how they cool the tube head. If they don't do it at all, I don't think device lifetime will be that long. Luckily x-rays have pretty limited range. I think 5m/yd should be minimal safe distance. The further the better, of course.

adammunich 7y ago
Operation is actually rate limited by the anode's ability to store heat, not dissipate it. The electron beam heats up the anode far too fast to reasonably dissipate the energy continuously.
- vardump 7y ago
  Ok, my knowledge about tube heads is rather superficial. I do know the devices I'm familiar with eventually require increasingly long cooldown periods.
  - adammunich 7y ago
    Yes, and in the US, interestingly enough those cool-down charts are actually required to be posted visibly on the machine by law.
  - AstralStorm 7y ago
    Which is why big medical x-ray machines have active liquid nitrogen cooling or solid co2, and also huge heatsinks.

grocid 7y ago

Judging for v1 [1] -- yes it is. And no we don't. That would be double-plus ungood. [1] https://adammunich.com/x-ray-machine/ https://adammunich.com/x-ray-machine/

aaron695 7y ago

> Do we want people to be firing these off in public? Once all 7 billion people have access to professionals then maybe we can ask this question? X-Rays were used for years to find peoples shoes size at shoes stores and no one was harmed. We have a lot more info on correct use now, so don't see the problem.... Other than amateurs need to do professionals job in this current world and the professional are commonly fighting back to stop the greater good to keep their wages high.

deleted 7y ago
[deleted]
JetSpiegel 7y ago
> no one was harmed Citation needed.
- aeternum 7y ago
  It very likely did cause harm: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1963031/pdf/brmedj03132-0034.pdf https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1963031/pdf/brm... https://www.wisconsinmedicalsociety.org/_WMS/publications/wmj/pdf/106/5/275.pdf https://www.wisconsinmedicalsociety.org/_WMS/publications/wm...