Glassman Update

27 07 2009

Today I shipped the Glassman power supply back to the manufacturer to be converted to a negative potential and refurbished. I also tested out the second Glassman. It turns on, but I was not registering the expected voltage from the FOCUS output.





Sled Sketch

27 07 2009

Here is a rough sketch of the sled. These dimensions will change, this sketch is for a welding estimate.

sled3





Glassman Unit

24 07 2009

The Glassman unit is currently supplying a positive potential, we need a negative potential. The tag on the back panel shows +/- 10kV:

IMG_3851

But inside the unit, in the high voltage section is this label:

Glassman_closeup

I’m going to talk to Glassman tech today.

UPDATE:

So I spoke to Glassman tech, and to get a negative potential for this unit I would need to swap out the entire high voltage section with a negative potential version. This power supply likely came with a negative unit, but it was not resold to me. I asked Glassman if they could make a negative unit for me. Might not be possible because the unit is so old.  Should know more soon.

UPDATE 2

Spoke with Bob Glassman. For $370 they can convert the unit to a negative polarity and refurbish it.





Sled Update

23 07 2009

Received the 2″ tubular steel from mcmaster. I cut the tubing on a horizontal bandsaw. Next I need to line up some MIG welding resources.

IMG_3852





Deuteronomy

23 07 2009

Received the deuterium today. Can you see it coming together? I can.

IMG_3836

We are storing it in the steel combustibles closet.





High Voltage Test

23 07 2009

Moment of truth today. Tested out the Glassman power-supply. On the bottom is the Glassman, on the top is the high voltage interconnect, the voltage divider, the ground clip, and a voltage meter.
IMG_3826

Pretty simple circuit. Here is the schematic for the voltage divider.
IMG_3822

When we fire it all the way up we see it metering at 9.97 Volts, which puts the potential at the high voltage very close to +10kV:

IMG_3839

So the power supply works, and we’ve had our first excursion with high voltage. We can measure high voltage at least with crude accuracy. I know that as I progress with this project measuring voltages and currents accurately will be a key skill.

So the last piece of the puzzle. According to the label this Glassman is +/- 10kV :

IMG_3851

Currently it’s set to a positive potential… we need negative. There is no front panel switch to reverse the polarity. I hope there is some in the box way to switch to a negative potential.





The Sled

22 07 2009

I’m starting on “The sled” a steel tube frame to hold all the components of the reactor. This frame will bear the weight of the chamber. I just bought this flexible coupling to make it easier to connect the chamber to the pump. This eliminates the difficult alignment of two heavy objects.








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