Search found 177 matches

by lutzhoffman
Wed Mar 16, 2011 6:54 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Japan to vent 'slightly' radioactive 'vapor' from troubled nuclear power plant
Replies: 21
Views: 5896

Re: Japan to vent 'slightly' radioactive 'vapor' from troubled nuclear power plant

<t>On a related note: Here in Hawaii Potassium Iodide tablets are flying off the shelves, with huge profits being made off the stupidity of many people here, in spite of the fact that there has been "zero" increase from background per the state air monitoring system: Which is actually a pretty neat ...
by lutzhoffman
Wed Mar 16, 2011 6:34 pm
Forum: Vacuum Technology (& FAQs)
Topic: Best Vacuum Pump
Replies: 3
Views: 1782

Re: Best Vacuum Pump

<t>Hello: <br/> <br/> Maybe try to search prior threads on this subject.... I noticed that you are focusing on "smaller" direct drive pumps, is there a reason for this like portability etc? If portability is not a major concern, then you may also consider larger capacity pumps, and belt drive pumps ...
by lutzhoffman
Wed Mar 16, 2011 1:40 am
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Nice PIG Ion Source Example, for "Homebrew"
Replies: 2
Views: 3980

Nice PIG Ion Source Example, for "Homebrew"

<t>Hello:<br/> <br/> Yes I know that there are so many PIG ion source designs out there, but this one caught my eye so to say, since it looks to be rather easy to build, and it uses common available materials with no "exotic" machining requird. Personally I prefer RF / microwave excited sources, lik...
by lutzhoffman
Tue Jan 25, 2011 7:03 pm
Forum: Images du Jour
Topic: Archived - Shoe-fitting fluoroscope
Replies: 9
Views: 9590

Re: Archived - Shoe-fitting fluoroscope

<t>Ref: The radiation hazard, these were not that bad for the "customer" since the MPD (Max Perm. Dose) for radiation workers is a whopping 50 rem for hands and feet. This is because there is no radiosensitive tissue in these body parts. For an adult the big ones are bone marrow in the hips, the tes...
by lutzhoffman
Tue Dec 28, 2010 2:26 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Russian neutron detector??
Replies: 4
Views: 2852

Re: Russian neutron detector??

If it is not hollow like an ion chamber, and filled with PE, then maybe it could be a "slow" neutron measuring probe, from an Am-Be neutron soil moisture testing machine?

If it is, then your real lucky, and it WILL be a nice Christmas for you after all : )
by lutzhoffman
Mon Dec 20, 2010 6:33 pm
Forum: Vacuum Technology (& FAQs)
Topic: Looking at new vacuum pumps and needing feedback
Replies: 24
Views: 4015

Re: Looking at new vacuum pumps and needing feedback

<t>Hello:<br/> <br/> Just my 2 cents worth.....If I was going to go with a HVAC type of pump, then I would buy the Robinair brand of direct drive pump. Robinair pumps have been proven in scientific applications by several credible home vacuum sites, including belljar.net. A new 2 stage Robinair pump...
by lutzhoffman
Tue Dec 14, 2010 1:25 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Cheap Fluorinert
Replies: 2
Views: 2391

Re: Cheap Fluorinert

<r>Check out the Galden line of inert fluorine containing fluids, these are at least equal to fluorinert in most respects, and superior in many others like almost complete UV resistance etc. The secret is that it is already a totally oxidized fluid, with no non bound carbons in the chain to break. <...
by lutzhoffman
Tue Dec 14, 2010 1:11 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: My Last HVPS for a While
Replies: 4
Views: 2092

Re: My Last HVPS for a While

<t>Hey here is a new idea to produce fusion: Ship a mixture of T and D (Licensed of course) via UPS in a box labled "fragile". They may "jumble and shock" the mixture enough to bring the nuclei into close enough proximity to get some fusion going <br/> <br/> Sorry, I just could not resist....After U...
by lutzhoffman
Thu Dec 09, 2010 7:07 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Fusor Body
Replies: 2
Views: 1567

Re: Fusor Body

<t>Hello:<br/> <br/> ASA is fine from a vacuum perspective, but ASA flanges tend to be huge for any given internal volume. If you want to go in this direction why not go with the ISO, or even conflat version? These have much smaller flanges on them, plus more surplus parts are available, plus they o...
by lutzhoffman
Thu Dec 09, 2010 6:50 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: that RADON inside the bags... how to seal it forever ?
Replies: 18
Views: 4769

Re: that RADON inside the bags... how to seal it forever ?

<t>Hello:<br/> <br/> Putting the gauge into a "tomb" of epoxy seems like overkill to me. Why not just put it into heat seal plastic bag, followed by a large glass canning jar with a good seal lid? This way you do not screw up any potential historical value that it may have, like to aircraft collecto...