Search found 1397 matches: safety

Searched query: +safety

by Dennis P Brown
Fri Sep 15, 2017 11:03 am
Forum: Images du Jour
Topic: Archived - European Fusor
Replies: 22
Views: 4973

Re: Archived - European Fusor

... 40 kV; above 25 kV electrical items get flaky (they can short to places/distances that normally one would not guess) and oil can provide a lot of safety margin in any system. The oil also allows less chance to have the high voltage jump to something that you are near or touching that would normally ...
by ian_krase
Sun Sep 10, 2017 9:28 am
Forum: Images du Jour
Topic: Plasma at Last!
Replies: 12
Views: 1471

Re: Plasma at Last!

... civil defense pen is one of the (rare) sensitive ones, right? The common ones don't start reading until the beginning of nuclear war tier acute safety hazards and devolve from there. Also, do you have good voltage instrumentation? The flickering of the plasma can come along with very large (order ...
by Richard Hull
Thu Sep 07, 2017 7:56 pm
Forum: Images du Jour
Topic: Plasma at Last!
Replies: 12
Views: 1471

Re: Plasma at Last!

... an unusually high but correct rate for that point only and will tell you nothing about what you get 5 feet away. If you are worried about personal safety, take measurements only at your obsever station....That will be what you are getting. Usually and hopefully, this is virtually unreadable. Richard ...
by Dennis P Brown
Wed Sep 06, 2017 1:26 pm
Forum: Images du Jour
Topic: Plasma at Last!
Replies: 12
Views: 1471

Re: Plasma at Last!

... reading to provide information if you should be concerned - if one experiments with real fusor power supplies having one of those is an important safety device. A quick aside: in that one picture with the red wire, I hope that isn't your ground wire? That ultra flimsy bead of solder holding that ...
by Dennis P Brown
Thu Aug 24, 2017 10:52 am
Forum: Images du Jour
Topic: 2nd demo fusor run
Replies: 2
Views: 480

Re: 2nd demo fusor run

... massive leakage - vacuum grease alone isn't going to work very well. This may be causing the high pressure in the bell jar. Also, this is a safety issue since glass on metal can create dangerous stress points. Also, you should consider making a better high voltage feed through than a spark ...
by Dennis P Brown
Wed Aug 23, 2017 12:46 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Addressing HV safety excursions: Oh Yikes what do I do?
Replies: 11
Views: 1132

Re: Addressing HV safety excursions: Oh Yikes what do I do?

To make my screen, I cut a small, circular piece of copper screen (but larger than the hole it is intended to fit "over") and gently pressed that piece of screen into said hole (making good electrical contact with the metal walls of the gauge tubes.) Works very well and solved the issue without caus...
by John Futter
Wed Aug 23, 2017 9:44 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Addressing HV safety excursions: Oh Yikes what do I do?
Replies: 11
Views: 1132

Re: Addressing HV safety excursions: Oh Yikes what do I do?

Or with penning / pirani gauges make sure you have a right angle bend between chamber and gaugehead
so the gauge does not see the plasma
ions are like rays of light they do not go round corners
by ian_krase
Wed Aug 23, 2017 8:36 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Addressing HV safety excursions: Oh Yikes what do I do?
Replies: 11
Views: 1132

Re: Addressing HV safety excursions: Oh Yikes what do I do?

I'm curious how you installed your metal screens. The easiest option would seem to be the weirdly expensive screened KF fitting rings.
by Richard Hull
Tue Aug 22, 2017 3:34 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Addressing HV safety excursions: Oh Yikes what do I do?
Replies: 11
Views: 1132

Re: Addressing HV safety excursions: Oh Yikes what do I do?

All gas discharge systems are electrically noisey! Arcing is even noisier! All modern microprocessor based electronics do not do well with electrical noise. Once all grounds are verified to be good and solid, as mentioned above, if reseting of the micro's continues, look for a possible unshielded "a...
by Dennis P Brown
Tue Aug 22, 2017 12:54 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Addressing HV safety excursions: Oh Yikes what do I do?
Replies: 11
Views: 1132

Re: Addressing HV safety excursions: Oh Yikes what do I do?

I have small copper screens over both my simple TC gauge and my ion gauge ports; discovered the hard way (not unlike you; and all my equipment has two independent ground points) that my plasma could see the grounds inside these gauge tubes - lucky, no costly failures.