FAQ - ion gun related paper a must read quick rinse

If you have a question about this topic, the answer is probably in here!
Post Reply
User avatar
Richard Hull
Moderator
Posts: 13200
Joined: Fri Jun 15, 2001 1:44 pm
Real name: Richard Hull

FAQ - ion gun related paper a must read quick rinse

Post by Richard Hull » Fri Nov 20, 2020 10:31 pm

I have never made and ion gun in my life. Therefore, no data from me beyond this rather important attached paper. It is a quick rinse for those interested in the topic. Yes, I could have put it in the files forum, but how often do we really go to it, cold, for data. Yes, I could have just dropped it in the ion gun ongoing forum, but it would cycle down out of sight. I found it informative.

I know a gang o' ion gun theory and construction details from reading over the years, but have never overcome the rest inertia to make one. I feel the ideal would be to have a spherical fusor with a number of 2.75 ion gun ports about it much like the Farnsworth late models. In this manner, one could freely play with any number of easy to test out gun ideas on a working fusor. This might demand a 10" spherical fusor to accommodate all those larger ports with ease. A 6 or 8 inch" fusor might benefit from 1.33 ports with reduced ion gun source capability. Regardless, one would be buying a lot of smaller vacuum level insulators in the 1-3kv range.

Thinking more conservatively, a special gun testing system might prove a better idea. Tests might benefit from a simple cylinder, "beam on target" system to test any single ion gun design for a more advanced fusor rather than go for the sphere right off the bat.

The attached paper is a, take you by the hand, power point program in PDF format. I feel this is a great FAQ for this rarely used forum. Facts and the basic math are given step by step. Read and learn some basic basics.

Once opened, just tap on the right arrow button to advance page by page. Pages 10-13 speak to how we operate our inefficient, but fully functional fusors. Page 15 speaks to the earliest Farnsworth canal ray ion sources. These would be an easy make for amateur fusors as a wall based deuteron source. Such sources would prove far more workable in a spherical fusor. While weak, such sources would prove workable and better than a poke in the eye with a sharp stick, fusion wise, in improving the simple fusor.

I attach a photo of the ITT Farnsworth canal ray ion sources.

Richard Hull
Attachments
Canal Ray mod anno.jpg
ionStockli_01.pdf
(1.37 MiB) Downloaded 131 times
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.

User avatar
Maciek Szymanski
Posts: 178
Joined: Wed Nov 20, 2019 7:31 pm
Real name: Maciek Szymański
Location: Warsaw, Poland

Re: FAQ - ion gun related paper a must read quick rinse

Post by Maciek Szymanski » Sat Nov 21, 2020 5:52 pm

That’s really great introductory material Richard! I would also recommend the chapter on ion sources for magnetic mirror systems in “Controlled Thermonuclear Reactions” by Glasstone and Lovberg (including the great bibliography). There is also a very in depth chapter on the penning ion source in “Characteristics Of Electrical Discharges In Magnetic Fields” by Guthrie and Wakerling (page 345) available free of charge in The Archive (as well as the previous book):

https://archive.org/details/in.ernet.dl ... 1/mode/2up
“Begin at the beginning," the King said, very gravely, "and go on till you come to the end: then stop.” ― Lewis Carroll, Alice in Wonderland

Post Reply

Return to “FAQs: Ion Gun Design and Construction”