Search found 22 matches

by Samuel Low
Thu Jan 25, 2018 1:04 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Has anyone used the Spellman X3000 50V-30kV 400uA Rev E7 24Vdc
Replies: 8
Views: 3986

Re: Has anyone used the Spellman X3000 50V-30kV 400uA Rev E7 24Vdc

I see, thanks for the input Dennis! Is there an optimum current rating? As far as I understand it, the key variable in confining a good plasma is voltage since that sets up the strength for the electric field. Since current (with voltage) also determines the input power, is there a power rating that...
by Samuel Low
Mon Jan 22, 2018 4:21 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Fusor Sharing Slides
Replies: 1
Views: 1564

Fusor Sharing Slides

So I've recently had some fun exhibiting demo fusors at the local science centre for children and youth, and I thought many of us might have the chance to demonstrate our demo fusors some day. Thus I have uploaded my presentation slides to share with the rest of the community to use. Feel free to do...
by Samuel Low
Mon Jan 22, 2018 4:00 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Has anyone used the Spellman X3000 50V-30kV 400uA Rev E7 24Vdc
Replies: 8
Views: 3986

Re: Has anyone used the Spellman X3000 50V-30kV 400uA Rev E7 24Vdc

Thank you for the reply, Ian and Dan! I think I've found a more suitable one, at 300W this would be about 10mA, I am hoping this amount of current would be okay. https://www.ebay.com.sg/itm/high-voltage-power-supply-with-30KV-300W-output-for-removing-smoke-lampblack/152538671351?hash=item23840368f7:...
by Samuel Low
Fri Jan 19, 2018 7:48 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Has anyone used the Spellman X3000 50V-30kV 400uA Rev E7 24Vdc
Replies: 8
Views: 3986

Has anyone used the Spellman X3000 50V-30kV 400uA Rev E7 24Vdc

As per the topic title, has anyone used this power supply before? The seller claims to have sold more than 20 units to fusor-builders in our community. I just want to know if anyone's touched this before and is it feasible or easy to use :) It seems to take in 24VDC through a... D-Sub connector? Ups...
by Samuel Low
Thu Mar 30, 2017 2:56 pm
Forum: Images du Jour
Topic: Thin-Walled Acrylic Demo Fusor
Replies: 3
Views: 2194

Thin-Walled Acrylic Demo Fusor

So I had my doubts about 5mm thick acrylic being able to hold the walls in a vacuum, and had extra implosion shielding just in case. Surprisingly, it held well, down to a pressure of about 500 Pascals (rough estimate, my gauge doesn't actually go to that level since its a cheap one). Did a simple se...
by Samuel Low
Sun Oct 23, 2016 10:25 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Neutron Transmutation Doping
Replies: 15
Views: 5682

Re: Neutron Transmutation Doping

Thank you Richard, for once again sharing the insight and wisdom. Its truly appreciated.

Artifice is a good word indeed... :)
by Samuel Low
Sat Oct 22, 2016 4:08 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Neutron Transmutation Doping
Replies: 15
Views: 5682

Re: Neutron Transmutation Doping

Interesting... I found the article online too, the one you just shared, Dan. Thank you very much, it sheds light on how far we are from using IEC devices for neutron production! Richard, do you happen to know the highest record for neutron production in an amateur fusion device? Would be interesting...
by Samuel Low
Wed Oct 19, 2016 2:43 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Neutron Transmutation Doping
Replies: 15
Views: 5682

Re: Neutron Transmutation Doping

Hmm... at 10cm away, there'll be about 796 neutrons per centimetre squared at that intensity... that will take orders of magnitude of 10^13s just to dope a concentration of 10^16 P / cm^2 on a silicon wafer... which is about 400,000 years of running the fusor just to dope a silly lump of silicon... ...
by Samuel Low
Mon Oct 17, 2016 6:40 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Neutron Transmutation Doping
Replies: 15
Views: 5682

Re: Neutron Transmutation Doping

Hi Richard. I'm not too sure! I'm hoping I can vary the flux level to a maximum (hoping to achieve at least 10^6 neutrons a second), and plot out the graphs of conductivities versus the neutron flux! I don't really have quantitative measure now as to what would be the maximal neutron flux, but the n...
by Samuel Low
Mon Oct 17, 2016 4:54 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Neutron Transmutation Doping
Replies: 15
Views: 5682

Neutron Transmutation Doping

So, I'm intending to finish the construction of a working fusor and a polywell with a funded student initiative I've had in school. I'm interested to place samples of raw pure silicon near the source of neutron radiation (of course assuming that is first achieved, which is the hard part!) and study ...