This diagram shows the possible coil configurations of the superconducting tape. Going from minor radius 2 mm at top to minor radius 7 mm at bottom.
I used the very cool XRVG to generate SVG diagrams from ruby.
Possible Polywells
15 11 2010Comments : Leave a Comment »
Categories : coils, Superconducting Magrid, superconductors
Liquid Nitrogen
28 09 2010Gearing up for another test of the superconducting magnet. So liquid nitrogen.
What is this… Halloween?
Comments : 4 Comments »
Categories : cryogenics, Superconducting Magrid, superconductors
Back
27 09 2010I’m back from a refreshing vacation. Started by cleaning up my desk:
Stuart gave me this cool old small parts drawer:
I’m going to start by taking another crack at the persistent switch for the superconducting magnet.
Also, if you have been trying to get a hold of me… now is a good time.
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Categories : Superconducting Magrid
Superconducting Magrid IRL
30 09 2009WOW. Check out this part we just got from prometal:
There is some slight warping, so the lid doesn’t fit as tightly with some of the faces. This can be corrected with machining, but some extra material would need to be built in.
It really helps to hold the shape in your hands. Amazingly this process is inexpensive. These two pieces cost ~$110. So we can afford to do about 10 iterations, more if necessary. Pretty cool.
Previously we used the 420 Stainless Steel +Bronze, which is magnetic. This time we used the 316 Stainless Steel + Bronze hoping it would be non-magnetic – but unfortunately it is magnetic.
With superconducting cable:
Comments : 22 Comments »
Categories : polywell, Superconducting Magrid
SC Magrid Feedthrough Simplification
31 08 2009Doing more thinking on the superconducting magrid feedthrough. Rather than have a bend between the magrid and a centered feedthrough, it would probably be easier to make a custom conflat blank with an off center 2.75″ pass though welded on. Like this:
The part would looks something like this (via MDC):
Comments : 5 Comments »
Categories : polywell, Superconducting Magrid
Standoff for Superconducting Magrid
29 08 2009I’ve been doing some brainstorming on the standoff for the superconducting magrid. This is a messy problem! You need a cryogenic feedthrough that is also a high voltage standoff. Then you need to pass in the YBCO superconducting cables, and wiring for the persistent switch.
Yesterday I realized that we can get most of the way there by welding together two off the shelf components:
This diagram refrences parts 9812107 and 9611005 from insulatorseal which is a subsidiary of MDC Vacuum. I’ve sent this drawing to insulatorseal for a quote. One problem is that part 9611005 is only rated up to 6kV so we will need a custom variant to get to the 10kV to 40kV range.
The idea with this setup is that the high voltage could come through a standard HV feedthrough and connect to the insulated tip of this feedthrough via a connecting wire:
Comments : 1 Comment »
Categories : cryogenics, High Voltage, Liquid Nitrogen, polywell, Superconducting Magrid
New STL for Superconducting Magrid
23 08 2009Created a new STL of the superconducting magrid using a tolerance of 0.01mm. It looks much smoother:
If you looks closely you can see the faceting. Also took some time to refactor the code that generates these shapes. I added a temp folder and a parts folder to keep the main directory free of trash. Now the resulting STL and PNG filenames include the hash tag of the current git HEAD so you can connect an STL file to the code that generated it. You can find the branch I’m working on here.
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Categories : BRL-CAd, polywell, Superconducting Magrid
Prometheus Fusion Perfection 