True, but lots of leakage paths for the HV charge on the MaGrid. I personally prefer the self supporting unit with minimal service connectivity.ladajo wrote:Wall Mounted coils = No nubs between coils.
Coating the insulators in order to prevent hot spots (embedded ion concentrations etc. sometimes seen in the old tube days) has been suggested. The more even you can keep the field gradient the better.ladajo wrote:I have been giving the HV leakage issue thoughts as well. If we can come up with some type of not-so-outgassy ceramic laminate construct, coupled with the the stands being in the shadow of the coils, thus minimizing or eliminating contamination being embedded/created by bombardment over time, it might well work nicely.
I've worked with line power up to 22KV directly and know all to well its sensitivity to impurities in the insulators. I've seen a couple of plasma balls eat some hardware, always humbling and spectacular at the same time. It has definitely satisfied my boyish need to blow shtuff up!
Research Grade MRIs are coming in at 9T. Production units are heading towards 3T and the most powerful full body MRI is in the 10T to 11T range. The 1T units are being retired.Heath_h49008 wrote:Ok... lets build one.
We need a dozen research grade 50-60 Tesla MRIs to pull apart, a tank the size of a small living-room, pumps, enough batteries to light up a medium size city, some very high end power management equipment... electron guns, ion management hardware, a full machine shop, some microwave emitters...etc, etc, ad infinitude, ad nausidude...
I'm joking. (sort of) But really, this isn't a lot of gear. :wink:
Anybody have friends in a major university science department, or know the door code to some abandoned places like Jackass Flats?
For that small a hole 3T is the transition point. About 9T would be good. Fortunately the smaller the dia the larger the field (up to the SC limits).Heath_h49008 wrote:What do we need for output to support the B-field for pB&j?
I know this thread was based on the idea we need varied strengths for each shape...
But for the hypothetical round magnet with the 15cm hole, and boron... what do we need?
MSimon and I have had this polite disagreement going for some time now, so I figured I'd make another installment!MSimon wrote:BTW it is going to be tricky to wire that up with superconductors.What am I missing?
We looked into that in an older thread. If you could just buy the magnets without the electronics it might be a good thing.hanelyp wrote:Which suggests recycling older MRI units into a lab grade polywell.MSimon wrote:Research Grade MRIs are coming in at 9T. Production units are heading towards 3T and the most powerful full body MRI is in the 10T to 11T range. The 1T units are being retired.
"IIUYC"??MSimon wrote:Kiteman,
A slinky is wrong. The fields will be pointing the wrong way. IIUYC.
The slinky is the starting material, not the final product. And when wound into an MPGIcos on it's winding jig it is a self supporting monocoque that needs only be hung by the minimum support to provide against gravity and other externally applied accelerations, and to provide the minimum services (current, cooling...). It works nicely, think about it. You'll catch up!And then the mechanical design to resist the generated forces. Lots of nubs or a porcupine of braces to the walls.
