I put together an emergency stop button for the reactor:
This will be positioned a safe distance from the reactor, so you can kill the high voltage from a distance. I’ll wire it up and test it today.
-30kV / 10mA
24 10 2009If you’ve been following me on twitter, you know I received a -30kV / 10mA Glassman a few days ago. Now it’s online and it kicks ass. Current limiting, remote controllable… it’s the second unit from the top:
Here is an air plasma it produced:
With current limiting and good air metering, we can get a stable plasma. I notice you get a sense for the plasma just by _listening_ to the glassman. When the plasma is unstable the glassman softly clicks along with the plasma burst.
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Categories : Fusor, High Voltage, Plasma
Grounding
29 08 2009Spent the last two days throughly grounding the entire system.
We start by attaching a ground line directly to the overhead sprinkler system. First we scrape off the paint:
Then we attach this purpose made ground clip:
Here it is installed:
We are using 12 AWG insulated stranded copper. In addition to this pipe ground, we are also using outlet ground from two different circuits:
Ground each piece of rack equipment, and the rack itself:
Ground several points on the chamber, sled, and pump:
Here is the high voltage connection point with high voltage divider inside glass insulation:
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Categories : Electrical Engineering, High Voltage
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:
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Categories : High Voltage, Liquid Nitrogen, Superconducting Magrid, cryogenics, polywell
Glass Insulator
6 08 2009Ordering this glass tubing to protect the atmosphere side of the high voltage feedthrough. Hopefully they can cut it to size for me. They will get back to me about that.
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Categories : High Voltage
High Voltage Divider
26 06 2009Just purchased this Model V1G high voltage divider. This device divides the input voltage by a factor of 1000, so we can measure high voltage with a regular multimeter.
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Categories : Electrical Engineering, High Voltage, Power Supply
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