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### Whats to be learned by comparing WB-6 and WB-7?

Posted: **Sun Jul 06, 2008 1:30 am**

by **Aero**

That is, without WB-7 data. On reading a large percentage of the posts on this BB, and all of the recent ones, I've noticed some new numbers cropping up. I understood that WB-6 used 30 cm coils, and that WB-7 was to duplicate WB-6 to verify results. But I see 35 cm coils bandied about for WB-7. This gets interesting, because our scaling law is B^4xR^3 and (17.5/15.0)^3 equals 1.6 (1.587962963 to be precise). That is, 60% more fusion from WB-7 than from WB-6, based on radius differences. Does anyone know the B field strength of WB-6? and WB-7? With those two numbers we could guess at the neutron count produced by WB-7. Again, assuming the same detectors and geometry. Safer to guess at total power.

Now, can someone tell me when the 1.6m machine dimension arose? It is attributed to Dr. Nebel. Did it arise before he did the above indicated calculations or afterward?

### Re: Whats to be learned by comparing WB-6 and WB-7?

Posted: **Sun Jul 06, 2008 3:24 am**

by **Roger**

Aero wrote:I understood that WB-6 used 30 cm coils, and that WB-7 was to duplicate WB-6 to verify results. But I see 35 cm coils bandied about for WB-7. ........

WB-6 had about 30-35cm coils, I believe WB-7 is the same exact size.

Aero wrote:
Now, can someone tell me when the 1.6m machine dimension arose? It is attributed to Dr. Nebel.

Attribute that to me, not Dr Nebel. Dr Nebel refered to a comment by TallDave, that used the 1.5 meter quote of Bussard.

Bussard said DD break even was 1.5 meters, so whats a DD 100MW net power unit ? I'll guess 1.6 meters. Something like 3-4 inches larger ?

Posted: **Sun Jul 06, 2008 4:29 am**

by **Aero**

Thanks Roger. Given that there seems to be no point to my original post.

Does anyone know the physical specifications of WB-6 and WB-7, for certain? I mean the real numbers to at least 3 decimal places?

Posted: **Sun Jul 06, 2008 10:47 am**

by **tonybarry**

Hello Aero,

I have a PDF of Bussard's WB-6 report, where he gives the coil dimensions as ID=201mm, OD=307mm, and overall MaGrid height as 393mm.

The PDF is titled:-

Final Successful Tests of WB-6; October/November 2005

Robert W. Bussard and R. Michael Wray

EMC2-0806-04

rev. 0107

Regards,

Tony Barry

Posted: **Sun Jul 06, 2008 1:46 pm**

by **Aero**

tonybarry wrote:Hello Aero,

I have a PDF of Bussard's WB-6 report, where he gives the coil dimensions as ID=201mm, OD=307mm, and overall MaGrid height as 393mm.

The PDF is titled:-

Final Successful Tests of WB-6; October/November 2005

Robert W. Bussard and R. Michael Wray

EMC2-0806-04

rev. 0107

Regards,

Tony Barry

Thanks Tony for the dimensions. I've looked for that report but it seems to have been taken down. Could I get a copy of your copy somehow?

Aero

### question about WB7

Posted: **Mon Jul 28, 2008 9:30 pm**

by **energyfan**

didnt want to open a new thread just for this, here's something that i was asked :

How wide is the vacuum chamber in WB7? And how wide is the centre sphere?

I didnt think of checking the WB6/WB7 sizes. There are some numbers given above about coil dimensions, will those values give a size for the vacuum chamber ?

** I posted the question on another thread, so it will be answered there. Sorry if this isint the right question for the thread.