Vacuum kit suggestions

Every fusor and fusion system seems to need a vacuum. This area is for detailed discussion of vacuum systems, materials, gauging, etc. related to fusor or fusion research.
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Angelo Romano
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Vacuum kit suggestions

Post by Angelo Romano » Fri Oct 19, 2018 3:31 pm

Hi I was trying to make fusion in my school and they gave me a 400-500 euro budget for all the vacuum equipment.
My initial aim is Just to make plasma.
They told not to use DIY solutions for the vacuum so I was searching something on eBay.
https://rover.ebay.com/rover/0/0/0?mpre ... 1867425448
This is the vacuum pump that I found in another post on this forum.
And this is the vacuum chamber I've found
https://rover.ebay.com/rover/0/0/0?mpre ... 2033423593
I don't know if the included vacuum gauge is good enough for my aim.
Could you give me some advices and tell me what do you think of this parts?

Thanks in advance,
Angelo.

Angelo Romano
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Re: Vacuum kit suggestions

Post by Angelo Romano » Fri Oct 19, 2018 3:38 pm

Sorry if I made this post twice. One of this posts was an error.
I can't delete this post so if you can, do it.

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Richard Hull
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Re: Vacuum kit suggestions

Post by Richard Hull » Fri Oct 19, 2018 7:20 pm

The two stage vacuum pump looks OK. However, the vacuum gauge is not good for the vacuum needed for even a demo fusor.

Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

Angelo Romano
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Re: Vacuum kit suggestions

Post by Angelo Romano » Sat Oct 20, 2018 5:41 am

Thank you.
I think that I'll change the vacuum chamber too withban high vacuum one.

Angelo Romano
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Re: Vacuum kit suggestions

Post by Angelo Romano » Sun Oct 21, 2018 5:42 pm

Richard Hull wrote:
Fri Oct 19, 2018 7:20 pm
The two stage vacuum pump looks OK. However, the vacuum gauge is not good for the vacuum needed for even a demo fusor.

Richard Hull
Would this pump also be fine to make fusion or only for a demo?

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Richard Hull
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Re: Vacuum kit suggestions

Post by Richard Hull » Mon Oct 22, 2018 3:57 am

Pretty much demo only. A diffusion or turbo pump is needed after the mechanical pump to warrant a low enough vacuum to allow a significantly pure deuterium gas environment.

Read the FAQs!!!

Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

Angelo Romano
Posts: 8
Joined: Fri Oct 19, 2018 2:19 pm
Real name: Angelo Romano

Re: Vacuum kit suggestions

Post by Angelo Romano » Mon Oct 22, 2018 10:23 am

Richard Hull wrote:
Mon Oct 22, 2018 3:57 am
Pretty much demo only. A diffusion or turbo pump is needed after the mechanical pump to warrant a low enough vacuum to allow a significantly pure deuterium gas environment.

Read the FAQs!!!

Richard Hull
I'm sorry, I didn't see the FAQs at that time.
Thanks for the help.
I've read some of the FAQs about vacuum chambers and I think that I'll be making a conflat chamber.
Is there any difference between using a cross or a tee of 2.75"OD?

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Dennis P Brown
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Re: Vacuum kit suggestions

Post by Dennis P Brown » Tue Oct 23, 2018 10:29 am

A "Tee" is generally a three-way and a "Cross" is generally a four way; the difference for fusors is the number of available "ports". One can use either but having extra access ports can be very useful (but does add cost for flanges.) Since fusor's tend to be moderate in vacuum requirements (10^-5 torr is fine), I use o-ring ports to reduce costs and allow me to more easily modify my flanges.

I am currently collecting parts for a new fusor and I have a four-way cross of 2.75 inch diameter. Apparently, these small "chambers" (a "T" or cross) with their sharp corners relax's power supply requirements - low 20 kV appears sufficient for measurable fusion using moderate detector equipment.

Angelo Romano
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Re: Vacuum kit suggestions

Post by Angelo Romano » Tue Oct 23, 2018 4:12 pm

Thank you a lot.
Your post was very helpful.
It really great to know that someone already did that.

Bye,
Angelo.

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