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by Dennis P Brown
Wed Sep 15, 2021 5:36 pm
Forum: Vacuum Technology (& FAQs)
Topic: Vacuum Bearings for TMP-50
Replies: 20
Views: 2972

Re: Vacuum Bearings for TMP-50

Maybe start a new one after this point. A spanner wrench used for lens system disassembly might enable you to remove the bearing from the shaft. Might need a puller. Can't tell from the photo.
by Dennis P Brown
Mon Sep 06, 2021 11:59 am
Forum: New User Chat Area
Topic: Is a Rectangular Vacuum Chamber a Good Choice for a Demo Fusor
Replies: 19
Views: 1055

Re: Is a Rectangular Vacuum Chamber a Good Choice for a Demo Fusor

If fairly accurate, the 0-10 micron range display has good resolution and would appear ideal for a fusor - standard fusors tend to operate in that region; smaller fusors operate higher but that display has that range as well. You should ask about returns (and a two week window to return) if the unit...
by Dennis P Brown
Sat Sep 04, 2021 1:06 pm
Forum: New User Chat Area
Topic: Is a Rectangular Vacuum Chamber a Good Choice for a Demo Fusor
Replies: 19
Views: 1055

Re: Is a Rectangular Vacuum Chamber a Good Choice for a Demo Fusor

That sounds like an excellent plan. Gaining experience with vacuum systems and related vacuum gauges is a critical first step and essential before one can do fusion in any fusor. That seems somewhat high for a simple TC gauge but I don't (any more) know what deals are out there. Maybe others could o...
by Dennis P Brown
Fri Sep 03, 2021 8:32 pm
Forum: Please Introduce Yourself
Topic: Hello from Utah
Replies: 3
Views: 436

Re: Hello from Utah

However, for unique issues (one often runs into when building a new system) FAQ's may or may not be useful; so, after searching and still need advice, then certainly do ask in the appropriate forum thread.
by Dennis P Brown
Fri Sep 03, 2021 8:27 pm
Forum: New User Chat Area
Topic: Is a Rectangular Vacuum Chamber a Good Choice for a Demo Fusor
Replies: 19
Views: 1055

Re: Is a Rectangular Vacuum Chamber a Good Choice for a Demo Fusor

Hold off on getting a diffusion pump (DP) until you learn the issues - there are many. First and foremost - size. Too large and you will go through too much deuterium gas and/or have an issue with adapters; that is the next issue- adapting a DP flange to your system. That more often requires custom ...
by Dennis P Brown
Thu Sep 02, 2021 4:43 pm
Forum: New User Chat Area
Topic: Is a Rectangular Vacuum Chamber a Good Choice for a Demo Fusor
Replies: 19
Views: 1055

Re: Is a Rectangular Vacuum Chamber a Good Choice for a Demo Fusor

For a roughing pump (a few microns to torr range), that is fine (pvc) but for high vac, no. Most use steel flex line and/or solid steel piping connectors. Type of seal, either KF (I use, simple and redoable o-ring seal) or copper gasket seal (generally needs replacement after a few uses.) Lots of pi...
by Dennis P Brown
Wed Sep 01, 2021 10:59 am
Forum: New User Chat Area
Topic: Is a Rectangular Vacuum Chamber a Good Choice for a Demo Fusor
Replies: 19
Views: 1055

Re: Is a Rectangular Vacuum Chamber a Good Choice for a Demo Fusor

Hard to tell but you will need a number of ports so you can add a observation window, high voltage input, exhaust port, made a small inlet for deuterium gas. I cannot tell what ports that chamber offers nor its size. Having sufficient room to prevent serious arc overs is useful. I assume it has a co...
by Dennis P Brown
Tue Aug 31, 2021 2:45 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Track detectors
Replies: 30
Views: 11607

Re: Track detectors

Neutrons can fill a room with cool neutrons; that is, many substances in and around a room will thermalize many neutrons and scatter them around the room. This can create issues with detectors.
by Dennis P Brown
Mon Aug 30, 2021 4:21 pm
Forum: Please Introduce Yourself
Topic: Hello, I'm from Florida
Replies: 1
Views: 147

Re: Hello, I'm from Florida

Hello. A demo fusor would be a good idea - not sure what a proto-fusor would be or entail; the experiment you out line requires both a very serious fusor and a lot of experience. Both take a lot of effort and likely time and certainly money if one doesn't build their own equipment. There are a lot o...
by Dennis P Brown
Sat Aug 28, 2021 5:10 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: My Gamma Spectroscopy Setup
Replies: 8
Views: 5747

Re: My Gamma Spectroscopy Setup

Agoo, best to fix your display name, too (I am a bit confused that real name doesn't automatically fill the 'by' entry ... .) Yes, a minor issue but best to follow the rules. Thanks.

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