How hot do the temperatures on the top and bottom of the fus
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How hot do the temperatures on the top and bottom of the fus
I am wondering as I need to know what metal I should cast it with. I am 12 years old and hoping to be the youngest in the neutron club.
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Re: How hot do the temperatures on the top and bottom of the
Cast? As in pouring liquid metal into a mold, casting?
Casting is not recommended for vacuum systems. It outgasses like you cant believe.
Casting is not recommended for vacuum systems. It outgasses like you cant believe.
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Re: How hot do the temperatures on the top and bottom of the
Yes but I will have a couple other systems to prevent that, and I do not have the necessary power tools to do it any other way
- Chris Bradley
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Re: How hot do the temperatures on the top and bottom of the
No one has cast their fusor shell (AFAIK), so if that is the route you pick for yourself, you are on your own and no-one can give you advice.
It is a crazy high-effort venture when there are such cheap alternatives to buy a chamber, or simply some of the larger vacuum fittings that will perform adequately.
Do you cast your own kitchen tools, frying pans, kettles, and such? I would expect you buy them, it is cheaper. Same with vacuum equipment.
It is a crazy high-effort venture when there are such cheap alternatives to buy a chamber, or simply some of the larger vacuum fittings that will perform adequately.
Do you cast your own kitchen tools, frying pans, kettles, and such? I would expect you buy them, it is cheaper. Same with vacuum equipment.
- Richard Hull
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Re: How hot do the temperatures on the top and bottom of the
I am curious. What metal or alloy were you considering? If I were forced against my better judgement to cast I would probably choose a copper-tin alloy like speculum Avoid alloys that don't cast to a smooth, ready you use finish. Avoid any alloys using metals that have a high vapor pressure above 600 deg C. I am intriqued by your boldness. You would be the first to ever cast a chamber. No help here other than the admonition about not using high vapor pressure metals and whatever you cast must never have pits and voids in the finished product.
Richard Hull
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
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
Fusion is the energy of the future....and it always will be
The more complex the idea put forward by the poor amateur, the more likely it will never see embodiment
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Re: How hot do the temperatures on the top and bottom of the
Ok I may be reconsidering the casting, but are there any services which can drill specific holes where and how big you want them?
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Re: How hot do the temperatures on the top and bottom of the
Yes, there are many different procedures available, they all depend on how much you can spend and what material you will be drilling. However, if you are abandoning the casting idea and going with a stainless steel shell, the best for this would most likely be CNC drilling if you can get access to it.
Tom
Tom
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Re: How hot do the temperatures on the top and bottom of the
This is a very late reply but where could I buy a viable chamber itself?
I am starting to get back onto the formus because I have sufficient finding
I am starting to get back onto the formus because I have sufficient finding
- Dennis P Brown
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Re: How hot do the temperatures on the top and bottom of the
Besides ebay, some people post here from time to time. When someone here posts it will have a good and useful selection of pre-flanged ports that work with most instruments/pumps. Ebay can be hard to get a system that is "off-the-self" ready. But deals exist if you can do some work or know where to get some SS high vac welding/cutting done.
As for youngest fusor ...first focus on getting a demo fusor working. The issue of deuterium, neutron detector, and the require and extremely dangerous power supply are major issues to address before one considers a real chamber.
As for youngest fusor ...first focus on getting a demo fusor working. The issue of deuterium, neutron detector, and the require and extremely dangerous power supply are major issues to address before one considers a real chamber.
- Andrew Robinson
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Re: How hot do the temperatures on the top and bottom of the
Pavle,
You seem to be missing some really basic concepts here, all of which are easily answered by reading the FAQs. I highly suggest follow in the footsteps most everyone on this forum has done at one point or another and spend a huge chunk of time just reading as much as you can. Good luck.
You seem to be missing some really basic concepts here, all of which are easily answered by reading the FAQs. I highly suggest follow in the footsteps most everyone on this forum has done at one point or another and spend a huge chunk of time just reading as much as you can. Good luck.
I can wire anything directly into anything! I'm the professor!
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Re: How hot do the temperatures on the top and bottom of the
For your intrest on casting vacuum chambers, it can be done and done well. The toroidal vacuum chamber for MST at UW madison is cast aluminum, and we get vacuums in the 1E-7 to 1E-8 torr range. Recently the madison plasma dynamo was constructed out of a 9 foot diameter cast aluminum sphere.
http://plasma.physics.wisc.edu/mpdx
http://www.news.wisc.edu/newsphotos/dynamo11.html
For a fusor, just buy a stainless hemisphere though.
http://plasma.physics.wisc.edu/mpdx
http://www.news.wisc.edu/newsphotos/dynamo11.html
For a fusor, just buy a stainless hemisphere though.
Andrew Seltzman
www.rtftechnologies.org
www.rtftechnologies.org
- Rich Feldman
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Re: How hot do the temperatures on the top and bottom of the
Very nice, Andrew, thanks for sharing. Quite the molding project for a one-off part. Biggest core I've ever seen. I wonder what alloy was used?
I bet that success with the smaller chamber helped to get approval for the 3-meter one.
As for why not a stainless steel weldment, do you know if magnetic field perturbations were a consideration?
Long ago I worked on the magnetometer boom for Voyager spacecraft.
Even "nonmagnetic" stainless steel can develop unwanted magnetic permeability
from cold working and welding, and it would not be cheap to anneal a 3 meter hemisphere.
http://www.cartech.com/techarticles.aspx?id=1476
I bet that success with the smaller chamber helped to get approval for the 3-meter one.
As for why not a stainless steel weldment, do you know if magnetic field perturbations were a consideration?
Long ago I worked on the magnetometer boom for Voyager spacecraft.
Even "nonmagnetic" stainless steel can develop unwanted magnetic permeability
from cold working and welding, and it would not be cheap to anneal a 3 meter hemisphere.
http://www.cartech.com/techarticles.aspx?id=1476
All models are wrong; some models are useful. -- George Box