Search found 132 matches

by myID
Sat May 01, 2010 12:35 pm
Forum: Vacuum Technology (& FAQs)
Topic: Pump down curve interpretation: Stopping of Turbo
Replies: 4
Views: 2673

Pump down curve interpretation: Stopping of Turbo

<t>Hi-<br/> <br/> when I keep my rotary pump running and switch on and off the turbo the curve looks like this (pressure range is from 5*10e-5 mbar (6.3) to 3*10e-4mbar (8) still have to do the calibration....time is from highest to highest pressure about 1000 sec).<br/> The pump down looks like I w...
by myID
Sun Apr 25, 2010 8:26 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: risk assessment
Replies: 13
Views: 5672

Re: risk assessment

<t>Hi Doug-<br/> <br/> I agree with the "shell gets them all" BUT:<br/> Xray "field" around my fusor measured with a sensitive counter (TBM-3S) is "not nice" even at voltages above 20kV - not only in "shine direction" of the viewport. <br/> I guess it does not penetrate the shell (around 10mm stainl...
by myID
Wed Apr 21, 2010 10:06 pm
Forum: Images du Jour
Topic: Archived - Fusor II
Replies: 17
Views: 8311

Re: Fusor II

<t>Hi and<br/> <br/> thank you for your advise- the manual of the Turbovac says: "come as you are" like Nirvana did- so horizontal mounting is fine. I did not find any information on optimal pressure rise curve when flooding the system.... <br/> Further more (I flood REALLY slow) I do not like the s...
by myID
Wed Apr 21, 2010 4:32 pm
Forum: Images du Jour
Topic: Archived - Fusor II
Replies: 17
Views: 8311

Archived - Fusor II

<t>Hi-<br/> <br/> finally I made my way back to Germany...<br/> Had a little time to set up my new toys- and the pictures show what the setup looks like now.<br/> I call it Fusor II because it is much more then just a small change:<br/> <br/> (first picture from left to right)<br/> - new HVPS: Berta...
by myID
Sat Mar 27, 2010 5:51 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Positioning He3 detector inside moderator PVC pipe
Replies: 5
Views: 2204

Re: Positioning He3 detector inside moderator PVC pipe

<t>Hi-<br/> <br/> you did not tell us what moderator you plan to use. I also prefer Paraffin like Doug does. Just fix an other tube slightly bigger then your detector in the middle and pour in the wax in layers (it shrinks a lot when it hardens). When it cooled down you can slide your detector in th...
by myID
Fri Mar 19, 2010 5:09 am
Forum: Images du Jour
Topic: Archived - Star Mode (American University)
Replies: 5
Views: 4202

Re: Star Mode (American University)

<t>Congratulations!<br/> <br/> Some pictures of the whole setup and some more details would be nice. What kind of pump? What chamber? Could be you already posted it somewhere else but might be also worth it to add it to this posting I think?<br/> What are your Future plans? Neutron production?<br/> ...
by myID
Tue Mar 16, 2010 11:21 pm
Forum: Vacuum Technology (& FAQs)
Topic: Phosphors/ coatings in TV tubes: toxic?
Replies: 10
Views: 3719

Phosphors/ coatings in TV tubes: toxic?

<t>Hi-<br/> <br/> I obtained some high vacuum parts that were used in TV Tube production. (Nobody needs them any more because TV tubes also go the "Way of the Dodo").<br/> There is à lot of white/ brownish powder in them (some Parts are obviously dust separators to protect the used Turbo Pumps). <br...
by myID
Sat Feb 27, 2010 8:25 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: B-10 Tube Testing
Replies: 27
Views: 7540

Re: B-10 Tube Testing

<t>Dear Richard-<br/> <br/> I asume this will be the same for a He3 and BF3 tube also? <br/> I also built the pathetically simple pre amp from the files section and so far just tested it with a pulser (also home brew from the files section)- nice! <br/> Could you please advise what values to use to ...
by myID
Thu Feb 25, 2010 8:38 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: B-10 Tube Testing
Replies: 27
Views: 7540

Re: B-10 Tube Testing

Hi-

just a hint- from what I know PVC eats Neutrons (I think Chlorine has a relatively high cross section)...
So probably you do not want to use it for your moderator?

Greets