Search found 10625 matches

by Richard Hull
Sat Feb 17, 2018 6:52 am
Forum: The Trading Post
Topic: Cute Ion source for vacuum chamber
Replies: 4
Views: 134

Re: Cute Ion source for vacuum chamber

Jerry, That was my feeling as well. Some special purpose system. They did silver plate the entire thing save for the flange with seems to be silver soldered SS. Regardless, they did a fine job on all the joints.

Richard Hull
by Richard Hull
Fri Feb 16, 2018 11:46 pm
Forum: The Trading Post
Topic: Cute Ion source for vacuum chamber
Replies: 4
Views: 134

Re: Cute Ion source for vacuum chamber

I have no idea where this source came from. I was told it was removed from a functioning system.

Base flange 3.0 inches diameter. Internal chamber 2.2 inches in diameter, From flange to top of HV insulator - 4.7 inches.

Richard Hull
by Richard Hull
Fri Feb 16, 2018 9:12 am
Forum: Vacuum Technology (& FAQs)
Topic: High Vacuum Engineering Design, Analysis, and Build of a Small-Scale Multipurpose System
Replies: 33
Views: 841

Re: High Vacuum Engineering Design, Analysis, and Build of a Small-Scale Multipurpose System

Looks like my system on fusor IV. Short connections, pump to TC gauge, fore line valve and Diff pump. You bought well. I wish others would start out this way. Pump down of the fore line should be near instantaneous. The diff pump will also be quick. My system can hit fore line plus the diff pump to ...
by Richard Hull
Fri Feb 16, 2018 8:55 am
Forum: The Trading Post
Topic: Cute Ion source for vacuum chamber
Replies: 4
Views: 134

Cute Ion source for vacuum chamber

I offer this for use as an ion source or a source for parts. This was removed from a vacuum system that needed ions, but not a focused gun source. This should do fine once a little cleaning and TLC in adapating is applied. It has an odd, (homemade), flange to attach it to the system. Approx 3 inches...
by Richard Hull
Thu Feb 15, 2018 7:54 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Bonding Tungsten and/or Iridium?
Replies: 27
Views: 1788

Re: Bonding Tungsten and/or Iridium?

Resistance welding is made very easy if capacitive discharge is used, as you just dial a voltage to get a rather precise joule energy in every weld. Professional machines for the vacuum tube industry usually had a selector switch to choose joule energy. My first resistance welder was a 10 volt 60 am...
by Richard Hull
Thu Feb 15, 2018 12:58 am
Forum: Images du Jour
Topic: Archived - Tom McCarthy's Fusor Efforts
Replies: 15
Views: 3747

Re: Archived - Tom McCarthy's Fusor Efforts

When you are finished and working, this will be a really sweet fusion system. Taking it slow and easy will allow for a system that has a far better chance of success out of the gate.

Richard Hull
by Richard Hull
Thu Feb 15, 2018 12:18 am
Forum: FAQs: Fusor Construction & Operation
Topic: FAQ - Joining metals - A critical fusor construction element
Replies: 1
Views: 109

FAQ - Joining metals - A critical fusor construction element

The following is a quick rinse in what methods are sometimes used to join metals in fusor construction. The mere assembly and joining of components to a fusor is just part of the big picture here. However you assemble and attach items to a fusor, it must also be vacuum tight and vacuum friendly. Thi...
by Richard Hull
Wed Feb 14, 2018 9:05 pm
Forum: Advanced Technical Discussion Area
Topic: Alternative Reactor Design
Replies: 15
Views: 3106

Re: Alternative Reactor Design

Thanks Daniel. A number of years ago Jon Rosenstiel experimented with a number of different grids even a solid ball and it did fusion! The grid design is not hyper critical. A needle point will do fusion just fine. Doug Coulter has used only a cylinder grid in his superb fusor for years. This is jus...
by Richard Hull
Wed Feb 14, 2018 8:51 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Inner Grid Rings and High Voltage Feedthrough
Replies: 5
Views: 137

Re: Inner Grid Rings and High Voltage Feedthrough

The HV feed-thru, if professional, will have a metal rod stalk. You must internally thread that stalk with a tap & die set to match your grid's thread. First, however, you must compute the length of stalk that will, once the grid is screwed in, center the grid within you device. This will usually me...
by Richard Hull
Wed Feb 14, 2018 8:21 pm
Forum: New User Chat Area
Topic: Demo vs Non-Demo Nuclear Fusion
Replies: 1
Views: 78

Re: Demo vs Non-Demo Nuclear Fusion

Any problem with reading the FAQs as you should have?............

viewtopic.php?f=24&t=2674&p=12184#p12184

Richard Hull