## Search found 31 matches

Thu Feb 26, 2009 6:53 pm
Forum: Theory
Topic: Scaling laws...
Replies: 7
Views: 3700
And ohmic heating in copper coils scales linear with wire lenght. Wire lenght scales up rÂ² if you grow coil volume too. That make ohmic coils quite unpractical. Art can maybe do some calculation how much it take power to feed say 6pcs 1m coils if coil diameter is 10cm and B=1T. Assume that coil mate...
Thu Feb 26, 2009 6:37 pm
Forum: Theory
Topic: Where in the magnets are the field lines?
Replies: 6
Views: 2727

### superconductors are not magnetic

Superconducting magnets generating field depends only inside currents. Only limiting thing is critical current. High fields itselfs are not limit, but they generate repulsion currents. You can find some proof with "freezing fields" words. Sc internal structure and current loops say how well it perfo...
Thu Dec 11, 2008 11:58 pm
Forum: Design
Topic: WB6 Coil question
Replies: 40
Views: 15006
After just reading the above post and associated posts I am suspicious of the above calculations. Perhaps he multiplied diameter by 7 as opposed to using the 7th power of diameter. I'm too lazy to carefully follow the math, but using examples with the presumed power gain = diameter to the 7th power...
Thu Dec 04, 2008 7:49 pm
Forum: Theory
Topic: Polywell for Space Propulsion
Replies: 27
Views: 8952
If ever BFR used star traveling trips, then it should burn H2. It give maximum energy per kg. Neutrons should capture to LH2 jacket and produce D2. Neutron escape to space is energy loss. Alphas produce electricity, after that they come 2nd BFR burn further etc until we are in Fe. After that Fe ions...
Thu Nov 20, 2008 3:31 pm
Forum: Design
Topic: A new nuclear power device
Replies: 40
Views: 12113
Actually it is human nature. Males are warriors. And worse is alpha males want to control stuff. Maybe some, but not all people. Propeties that are bad should reduce in Darvin cycles. The idea that it is TV and Hollywood is nuts. For American Plains Indians there was no Hollywood in 1800 and yet th...
Thu Nov 20, 2008 2:29 pm
Forum: Design
Topic: massive megahertz multi megawatt magnetron
Replies: 18
Views: 6986
Dr. Mike: http://www.fingrid.fi/uploads/ConstructionSiteMap/attachments/esite.pdf It is an air insulated 400KV DC converter. It is not small. It is twenty years old thecnology. I was small boy when they build it. I remember some articles and thinked why they want use DC to carry energy. It is so co...
Thu Nov 20, 2008 1:53 pm
Forum: Design
Topic: A new nuclear power device
Replies: 40
Views: 12113
Kiteman, I'm suggesting what could be done if some one was bloody minded. Why to scare? If BFR works it give so much good that there is no more need to make oil wars etc. And after US stop saying what other countries are allowed to do there is no angry terrorist against US. Fundamentals (idiots) be...
Thu Nov 20, 2008 1:33 pm
Forum: Design
Topic: A new nuclear power device
Replies: 40
Views: 12113
using a deuterium or lead blanket would work well as a way of capturing the energy from the neutrons. Though it's my lack of knowledge in certain areas of nuclear technology, but I thought that fission produced thermal energy as well as neutrons. When neutrons and gammas hit material, they produce ...
Tue Nov 18, 2008 9:37 pm
Forum: Design
Topic: A new nuclear power device
Replies: 40
Views: 12113

### Re: A new nuclear power device

The theory is that nuclear fission and fusion can be used to help each other, especially in the case of a standard fusor. How you handle fission waste products? How capture fission neutrons energy? What fission things help fusion? Ok, on/off neutron source maybe, but fission waste make off situatio...
Tue Nov 18, 2008 6:26 pm
Forum: Design
Topic: Heat exchangers
Replies: 48
Views: 14198
Where do I put the at sign? Too hard, ok, easyer now? eerin at xylogas. fi I read some: http://www.talk-polywell.org/bb/viewtopic.php?t=66&highlight=permanent+magnet I see now it is posible to magnetize permanet magnet ring correctly. But correctly magnetized permanent magnet field lines keep insid...
Mon Nov 17, 2008 5:56 pm
Forum: Design
Topic: Heat exchangers
Replies: 48
Views: 14198
How can winding a ribbon around a spool be a harder problem than assembling a bunch of stampings? I think Bitter idea is resist magnet forces, so windins need to be disks that carry expansion better and are bolted with end plates together to keep plates not expoloding away. Cooling is also quite ea...
Mon Nov 17, 2008 5:41 pm
Forum: Design
Topic: Heat exchangers
Replies: 48
Views: 14198
MSimon wrote:Give me your e-mail and I will send you my spread sheet. If you don't want your e-mail public - send me a PM.
Why hide, spammers maybe, but try

eerin xylogas period fi
Mon Nov 17, 2008 5:39 pm
Forum: Design
Topic: Heat exchangers
Replies: 48
Views: 14198
It is where the field lines converge. In an electromagnet they converge in "empty" space. In a permanent magnet they converge on the face of the magnet. Draw a picture - it will be obvious. In an electromagnet the field lines go around the coil. In a permanent magnet they enter one face and exit th...
Sat Nov 15, 2008 5:27 pm
Forum: Design
Topic: Heat exchangers
Replies: 48
Views: 14198
Permanent Magnets won't work. The field lines are in the wrong place. Electromagnets are the only way. This has been discussed extensively on this board. Look around. Uh, not find yet, there are so much text it take month ore more to read all. However I can't yet imagine why they can't magnetize li...
Sat Nov 15, 2008 2:04 pm
Forum: Design