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4hv.org :: Forums :: Projects
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Diffusion pump project

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Fabio
Fri Nov 06 2009, 11:29PM
Fabio Registered Member #122 Joined: Fri Feb 10 2006, 12:55PM
Location: Milano Italy
Posts: 148
Hi Guys!

This theread is simply inspiring for me, for this reason, i searched something similar on ebay with no luck...... after 2 tries i finally bought this:

Link2

it came from italy so shipping is faster and cheaper for me, the final price was 130€ including shipping, handling and insurance, now i need 60ml of diffusion fluid and some spare time to make my vacuum setup! amazed
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Proud Mary
Sat Nov 07 2009, 01:19AM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
I feel a little sad to say nothing more than Grosse Gluck, but I have a few hundred gammes of Ca - an old fashioned getter I know - but I'll be more than happy to help out with any genuine vacuum ethusiasts in need of old fashioned getters.

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plazmatron
Sat Nov 07 2009, 01:28AM
plazmatron Registered Member #1134 Joined: Tue Nov 20 2007, 04:39PM
Location: Bonnie Scotland
Posts: 351
Ah! You're the guy that managed to build a gas x-ray tube using a air conditioning pump, and some getters right?

Nice pump! Told you these things were cheap!

The spec for the diffstak 63, says it requires Santovac 5 as the pump fluid. In the event you cant get hold of it in the small quantities required, you could always use DC-704 or DC-705. A neon sign shop is your best bet for getting fluid, since the main manufacturers have minimum orders of 500ml (which is around 650 Euro!)

I bought my fluid from http://www.sign-tec.co.uk/ they were quite helpful, and sell in multiples of 50ml. If you ask nicely, they will probably ship internationally.

The Lenard tube is on hold until my titanium foil arrives, at which point it will get its own thread, since I have been busy building a much better tube smile


Once you have this thing up and running, you will love it!

Les
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Fabio
Sat Nov 07 2009, 11:29PM
Fabio Registered Member #122 Joined: Fri Feb 10 2006, 12:55PM
Location: Milano Italy
Posts: 148


Ah! You're the guy that managed to build a gas x-ray tube using a air conditioning pump, and some getters right?

Yes i am!
I also build the Xray camera and the demo fusor and many other strange equipments
Link2
Link2


The spec for the diffstak 63, says it requires Santovac 5 as the pump fluid. In the event you cant get


I have a friend who works for a company that installs and makes maintenance for the vacuum systems, finding the right fluid isn't a problem, i also haven't any problem in finding some getters, nickel, kovar, berillium windows and glass; finally, if i need a titanium foil, i can simply search it on ebay!
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rp181
Sat Nov 07 2009, 11:48PM
rp181 Registered Member #1062 Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
Did the fusor actually achieve fusion? All of the ones I have seen used the lab type vacuum chambers, to support the high vacuum.
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Fabio
Wed Nov 11 2009, 09:37AM
Fabio Registered Member #122 Joined: Fri Feb 10 2006, 12:55PM
Location: Milano Italy
Posts: 148
Where is my previous post????

anyway, i have a backup!


*********************************************


i never tried a real fusion yet because so far i don't have a decent vacuum pump.


anyhow, a glass chamber can easily support the required vacuum if all seals are OK, the main problem is relative to ion bombardment, the glass will be easily overheated in some spots while remains cold in the other, this phenomenon will lead in cracks, and finally an implosion if the fusion will be continued for too much time!

Now i have this chamber, but after i will reach my first fusion, i will probably switch to a better chamber.



Ciao!
Fabio.



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Fabio
Wed Nov 11 2009, 11:48PM
Fabio Registered Member #122 Joined: Fri Feb 10 2006, 12:55PM
Location: Milano Italy
Posts: 148
Just arrived!!! amazed


Th


Ciao!
Fabio
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Nicko
Thu Nov 12 2009, 08:53AM
Nicko Registered Member #1334 Joined: Tue Feb 19 2008, 04:37PM
Location: Nr. London, UK
Posts: 615
plazmatron wrote ...

...I bought my fluid from http://www.sign-tec.co.uk/ they were quite helpful, and sell in multiples of 50ml. If you ask nicely, they will probably ship internationally.
...
Sign-Tec are just down the road from me (next village where my in-laws have a farm). I paid them a visit a couple of months ago - very helpful people. They do accept personal callers (I always phoned in advance), but are mostly mail-order - bought an NST and some HV cable. As the neon business is in general decline world-wide, they are also doing a lot of LED & other stuff - their new web site is vastly better than their old one, but its always worth phoning as not everything is online.

Usefully, they are also adjacent to the local recycling centre - very convenient for nice MOT/MOCs etc.
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Fabio
Sun Jan 17 2010, 09:12PM
Fabio Registered Member #122 Joined: Fri Feb 10 2006, 12:55PM
Location: Milano Italy
Posts: 148
Hi All!


Weeeeeeee, i finally have a real vacuum vessel!!!!!!!!!

Th

Th

Unfortunately, i found a big leak (and eventually there are some other smaller leaks) so the system
cannot be pumped down yet, but i have a limited mechanical skills and this is only my first attempt with the diffusion pump.


WORK IN PROGRESS!!!! cheesey

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Fabio
Sun Feb 07 2010, 11:58PM
Fabio Registered Member #122 Joined: Fri Feb 10 2006, 12:55PM
Location: Milano Italy
Posts: 148
New update: Now i have a welded frame, is not exactly a small vacuum system but..... who cares???

Th


Ciao!
Fabio.
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