Search found 1986 matches

by DaveC
Mon Nov 05, 2012 11:35 pm
Forum: Vacuum Technology (& FAQs)
Topic: TCP 121 schematic
Replies: 14
Views: 6246

Re: TCP 121 schematic

<r>Jeroen -<br/> <br/> Not sure if this is all you'll need, but check here:<br/> <br/> Pfeiffer Vacuum TCP 120 121 Manual pdf free ebook download from ...<br/> <URL url="http://ebookbrowse.com/pfeiffer-vacuum-tcp-120-121-manual-pdf-d2531"><LINK_TEXT text="http://ebookbrowse.com/pfeiffer-vacuum- ... ...
by DaveC
Wed Aug 08, 2012 12:54 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: First Light and Plasma Photos
Replies: 17
Views: 6051

Re: First Light and Plasma Photos

<t>Chris - <br/> <br/> Simply a matter of "due diligence"....being careful. One learns in science, not to assume anything unconsciously. Explicit assumptions are often necessary, but when it come to high voltage safety, one should never assume connections are one way or another, without at least att...
by DaveC
Mon Aug 06, 2012 9:32 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: First Light and Plasma Photos
Replies: 17
Views: 6051

Re: First Light and Plasma Photos

<t>Jake - <br/> <br/> From what I see, you have the bottom two stages of a voltage multiplier, which should produce an UNLOADED voltage of roughly 2x the peak to peak voltage across the transformer terminals. <br/> <br/> The NST's secondary may or may not be referenced (or connected) to the case gro...
by DaveC
Tue May 15, 2012 10:18 pm
Forum: FAQs: Fusor Construction & Operation
Topic: FAQ: Obtaining that perfect sphere....
Replies: 7
Views: 7717

Re: FAQ: Obtaining that perfect sphere....

I certainly agree with that, 100 %. That some studies indicate a significant amount of fusion occurs outside of the central "focus", supports Richard's point that the quality of focus within a spherical fusor may have a somewhat limited benefit.

Dave Cooper
by DaveC
Mon May 14, 2012 9:36 pm
Forum: FAQs: Fusor Construction & Operation
Topic: FAQ: Obtaining that perfect sphere....
Replies: 7
Views: 7717

Re: FAQ: Obtaining that perfect sphere....

<t>Good thoughts, Richard. <br/> <br/> To add a bit more to the issue of field uniformity, one can estimate the effects of local aberrations in geometry, using the concept of treating such geometry variations as introducing small regions havaing a radius of curvature equal to the size of the feature...
by DaveC
Thu Mar 08, 2012 10:16 pm
Forum: Fusion --- Past, Present, and Future
Topic: Mike qualified for the Intel ISEF tonight
Replies: 3
Views: 2501

Re: Mike qualified for the Intel ISEF tonight

<t>I'd like to add my congratulations for Mike's accomplishments and his tirelessly supportive Dad. This is a great opportunity for him, given his present work.<br/> We all can look forward to his contributions on this net in the future.<br/> <br/> Observing Richard's *** note: <br/> I would say, th...
by DaveC
Mon Mar 05, 2012 8:08 pm
Forum: FAQs: Fusor Construction & Operation
Topic: #6 FAQ: Quick fusion factoids
Replies: 11
Views: 9310

Re: FAQ: Quick fusion factoids

<t>I also share Richard's concern about the use of glass bell jars, where there is even a remote possibility of intense beam formation. The localized heating (and failure) may occur before one is even aware of the conditions within the jar. <br/> <br/> And.... no one should ever use a glass bell jar...
by DaveC
Fri Mar 02, 2012 11:36 pm
Forum: Vacuum Technology (& FAQs)
Topic: How to minimize backstreaming from diffusion pump
Replies: 13
Views: 5367

Re: How to minimize backstreaming from diffusion pump

<t>I hope this doesn't confuse things, but Jeff's last sketch seems to me to be almost the ideal arrangement of plumbing. <br/> <br/> From my experience with a variety of vacuum systems, it is just about mandatory to have a valved "roughing line" to the device being evacuated. Rough pumping through ...
by DaveC
Fri Mar 02, 2012 11:01 pm
Forum: FAQs: Fusor Construction & Operation
Topic: #6 FAQ: Quick fusion factoids
Replies: 11
Views: 9310

Re: FAQ: Quick fusion factoids

Richard -

Nicely done. Most newcomers will be able to get a handle on the outlines of what it takes from this.


Thanks for collecting the wisdom....

Dave Cooper
by DaveC
Thu Feb 16, 2012 9:57 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: XRF X-ray transformer
Replies: 11
Views: 4513

Re: XRF X-ray transformer

<t>The can for the HV assembly is kind of standard for this vintage of X Ray HVPS. <br/> <br/> They were all heavily built, filled with gallons of Transformer Oil and many pounds of conservatively rated mains (usually) frequency transformer steel. <br/> <br/> There are actually lots of these systems...