Search found 95 matches

by UG!
Sat Jul 14, 2007 9:05 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Chamber Design
Replies: 8
Views: 3906

Re: Chamber Design

<r>a few comments:<br/> you want to make shour the recessed for the bolts are large enough to get a hex socket over the nut and bolt heads to tighten them up! they don;t look big enough to me.<br/> <br/> you need to decide that sealing type you'r going to use, you don't appear to have much space for...
by UG!
Fri Jul 13, 2007 8:59 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: homemade switchmode HV supply
Replies: 10
Views: 6628

Re: homemade switchmode HV supply

<r>sorry for delay in replying, i have been very busy with my dissertation. <br/> <br/> very helpfull, thanks Dave <E>:)</E> i suspected as much about the PWM voltage controll, unfortunatly it doubles the complexity of the whole project, i'll probably end up useing a variac.<br/> <br/> i was plannin...
by UG!
Sun Jul 01, 2007 10:35 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: homemade switchmode HV supply
Replies: 10
Views: 6628

Re: homemade switchmode HV supply

<r>thanks for advice <E>:)</E><br/> <br/> i am planning on vacuum impregnating the secondary (which is why i want plane mylar sheet, rather sticky tape, which i discovered tends to seal in the inner most windings, and prevent potting compound getting to them.)<br/> <br/> i did consider useing a VARA...
by UG!
Wed Jun 27, 2007 9:08 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: homemade switchmode HV supply
Replies: 10
Views: 6628

homemade switchmode HV supply

<r>i have gathered most of the bits to make one of these, but some areas of my understanding remain cloudy:<br/> <br/> first, how are people varying the output voltage? PWM control seems to be popular, but it seems to me that this will only vary the average power delivered to the multiplier stack, r...
by UG!
Sun Jun 10, 2007 8:46 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Magnetron Ion source
Replies: 9
Views: 8483

Re: Magnetron Ion source---- WARNING ----

<t>if anyone knows much about RF sheilding, it would be usefull to have a FAQ on it, magnetrons and the associated PSUs are easy to come by and would be nice to experiment with but questions like 'just how does one stop the RF escaping through a viewport?, down the vacuum plumbing?, up the HV lines?...
by UG!
Sun Apr 08, 2007 9:33 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Problems associated with outergrid-less fusors
Replies: 3
Views: 1760

Re: Problems associated with outergrid-less fusors

a non-spherical outer grid or outer caseing will result in a poorly focused plasma. i descovered this with my cylindrical vacuum chamber. put a spherical outer grid round it and the problem goes away.

Oliver
by UG!
Sat Apr 07, 2007 8:04 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Ignition is a whole new ball game.
Replies: 35
Views: 9471

Re: Ignition is a whole new ball game.

<t>the more i learn about fission reactors, the more i wonder why humanity is even bothering with fusion as a power sauce. we could solve the entire energy problem for a thousand years or so if we just switched to fission and put a little more effort/money into breader reactor development. <br/> <br...
by UG!
Fri Dec 22, 2006 3:04 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: He3 and BF3 spectra
Replies: 3
Views: 2570

Re: He3 and BF3 spectra

<r>the MCA is a PC card based one, i don;t recall the exact model but its rather old, (a full length ISA card) the software is dos based 'oxford pca' sounds about right. the card is capeable of about 8000 channels, but here was set on 1000.<br/> i have all the information in my uny house, and i'm ho...
by UG!
Thu Dec 21, 2006 10:55 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: He3 and BF3 spectra
Replies: 3
Views: 2570

He3 and BF3 spectra

<r>for peoples general information andinterest... <E>:)</E><br/> here are some pulse height spectra taken from the He3 and BF3 tubes in the radiation labs at uny as part of a practical. the features show the charistics of the neutron capture reactons of the He3 and B10.<br/> there were 2 neutron sou...
by UG!
Wed Dec 20, 2006 10:16 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: NIM crate voltage tolerances
Replies: 2
Views: 1492

Re: NIM crate voltage tolerances

<r>that doesn't help <E>:(</E> it took me 2 years to find a nim bin, i'm not waiting another 2 <E>:(</E><br/> <br/> but whatever i do will likely be better than the origanal design, i just wandered if there was any good reason why i couldn't just use modurn adjustable regulators, mabey with a 2N3055...