Search found 29 matches

by windmill
Sun Jan 06, 2008 8:04 pm
Forum: News
Topic: Details On The WB-7 Experiments
Replies: 54
Views: 25508

One possible way to increase the cooling capacity of the system without increasing the cross sectional area might be to use the winding armature/support structure of the coils as a heat sink that is actively cooled externally to the vacuum vessel. I believe this idea has been used in spaceborne SC m...
by windmill
Mon Nov 19, 2007 4:59 pm
Forum: Theory
Topic: magrid configuration brainstorming
Replies: 632
Views: 141212

That new MgB2 superconductor should be great for this app. I noticed the company that makes the wire supplies it in round section and in, I believe, kilometer-long continous lengths. I wonder how much wire we would need for a 4T, 3 meter diameter coil? It's ampere-turns that partially determine fiel...
by windmill
Fri Nov 16, 2007 4:18 pm
Forum: Theory
Topic: magrid configuration brainstorming
Replies: 632
Views: 141212

Being a mechnical designer makes me look at these configurations from the standpoint of "how are you going to support these things?" Inside a vacuum tank. On megavolt standoffs. That support TONS of vectored forces trying to push them apart (or together, depending.) Through which you have ...
by windmill
Thu Nov 08, 2007 4:39 pm
Forum: Design
Topic: High Voltage Power Supplies
Replies: 0
Views: 1567

High Voltage Power Supplies

Interesting solid-state power supply technology for high voltage, high power applications (like magrids and superconducting magnets):
http://www.divtecs.com/index.htm
by windmill
Mon Nov 05, 2007 4:45 pm
Forum: Theory
Topic: Fusion litelature and website suggestions
Replies: 37
Views: 25525

WB-6 experiments paper from EMC2

I was surprised to see that the University of Wisconsin has posted what appears to be EMC2's 26 page "confidential" paper on the results of the WB-6 experiments, as required reading material for one of their plasma physics courses. Does anyone know if they have permission to do this? Or is...
by windmill
Fri Nov 02, 2007 1:49 pm
Forum: Design
Topic: Hardware
Replies: 31
Views: 14810

MSimon, you said it. There's enough unknowns here to keep a whole "Bussard Institute for the Study of Polywell Physics" going for years and years!
by windmill
Wed Oct 31, 2007 3:33 pm
Forum: Design
Topic: Hardware
Replies: 31
Views: 14810

From the cursory reading I've done on POPS, I thought power scales INVERESLY as the size, hence the reactor design consists of hundreds of small (cm-sized) reaction chambers oscillating in phase. Doesn't that directly oppose the Polywell power scaling law? When I listened to the interview, Dr. Bussa...
by windmill
Mon Sep 17, 2007 5:58 pm
Forum: Theory
Topic: Why 'polywell'?
Replies: 4
Views: 3044

"Poly" refers to polyhedral, as in the geometric configuration of the B field coils.
The quasi-spherical negative potential well is formed by the combined fields of the individual coils, hence: "polywell".
by windmill
Tue Sep 11, 2007 8:37 pm
Forum: Theory
Topic: Energy Balance Formula for Polywell
Replies: 30
Views: 12205

...and if gain scales as the 5th power of the radius, just going from 1.5m to 2.0m radius will increase the gain by 1.33^5 or 4.2 times. Gain becomes 4.2 x 3.5 = 14.7!!!

I love this technology.
by windmill
Tue Sep 11, 2007 6:46 pm
Forum: Theory
Topic: Energy Balance Formula for Polywell
Replies: 30
Views: 12205

We do have Bussard's own estimates of a 100Mw net power machine's gain, in his "Clean Energy Future" summary. He writes: PROOF OF CLEAN FUSION POWER REQUIRES FULL SCALE TEST MACHINES (ca. 3 m DIAMETER, 40 MW DRIVE POWER, 15-25 kG MAGNETIC FIELDS, DRIVE ENERGIES UP TO 180 kV). If this is ac...
by windmill
Mon Sep 10, 2007 4:38 pm
Forum: Design
Topic: Cogeneration capability
Replies: 2
Views: 3409

Cogeneration capability

Cooling the magrid seems to be a topic that arises from time to time on this and other forums. I was wondering: how practical it would be to use a closed brayton cycle helium gas turbine like the ones proposed for next-generation fission plants, to generate power from the magrid cooling system? You ...
by windmill
Fri Sep 07, 2007 8:06 pm
Forum: Theory
Topic: My understanding of how the Magrid Works
Replies: 14
Views: 5784

So, once the central virtual cathode is stabilised at a particular well depth, the well can be maintained at that depth just by ensuring that the electron losses are balanced by sufficient injected electron current? Does this square with the idea that the polywell system acts as a momentum transform...
by windmill
Fri Sep 07, 2007 5:07 pm
Forum: Theory
Topic: My understanding of how the Magrid Works
Replies: 14
Views: 5784

This raises an issue I've been struggling with for some time, namely, how the well depth is determined by the machine parameters. I was initially under the impression that the electron guns impart the KeV necessary to accelerate the electrons to slightly more than the resulting potential well depth,...
by windmill
Thu Jul 19, 2007 3:33 pm
Forum: Theory
Topic: Fusion litelature and website suggestions
Replies: 37
Views: 25525

Fusion Technology Journal

I just joined the group and noticed there is some confusion regarding the Bussard and Krall papers. Fusion Technology was the title of the journal that became Fusion Science and Technology, published by the American Nuclear Society. They printed three articles in the early nineties about the Polywel...

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