Search found 228 matches

by Dan Knapp
Fri Feb 22, 2019 5:39 pm
Forum: FAQs: Fusion and Fusor Theory
Topic: FAQ - Must reading for all who would do fusion
Replies: 1
Views: 269

Re: FAQ - Must reading for all who would do fusion

I became aware of this report from a posting on "the Fire Place" http://www.firefusionpower.org/. For those readers not familiar with this web site, it is an ongoing bulletin board of activity in the fusion field. Another source I use for fusions news is the news section of the polywell blog, http:/...
by Dan Knapp
Fri Feb 22, 2019 5:29 pm
Forum: Advanced Technical Discussion Area
Topic: A theoretical discussion based on data re. fusor conditioning fusion
Replies: 11
Views: 3681

Re: A theoretical discussion based on data re. fusor conditioning fusion

In most of the grid photos I've seen, and in my own very limited experience operating a gridded fusor, the grids are glowing from bombardment heating. It would seem that such heating would tend to drive off adsorbed gas. As such, this effect would seem to work against fusion due to grid bombardment....
by Dan Knapp
Thu Feb 21, 2019 9:25 pm
Forum: Advanced Technical Discussion Area
Topic: A theoretical discussion based on data re. fusor conditioning fusion
Replies: 11
Views: 3681

Re: A theoretical discussion based on data re. fusor conditioning fusion

A recent paper from Joe Khachan's group in Sydney and their collaborators in Dresden is relevant to this discussion: R. Bowden-Reid et al., Evidence for surface fusion in inertial electrostatic confinement fusion devices, Physics of Plasmas 25: 112702 (2018). Unfortunately, you need to have access t...
by Dan Knapp
Thu Feb 21, 2019 8:45 pm
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: Magneto-inertial Fusion (MIF)
Replies: 1
Views: 103

Magneto-inertial Fusion (MIF)

The DOE recently released a report on its "ALPHA" Program where they have been supporting several approaches to MIF as "intermediate density fusion" i.e. density between Magnetic Confinement Fusion (MCF) and Inertial Confinement Fusion (ICF). https://fas.org/irp/agency/dod/jason/fusiondev.pdf This r...
by Dan Knapp
Thu Feb 21, 2019 8:13 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: A semi-DIY preamplifier for radiation detectors
Replies: 7
Views: 508

Re: A semi-DIY preamplifier for radiation detectors

There are two companies that use the Cremat modules in their preamps for which they post the manuals online. These user manuals include circuits and other useful information:
https://www.fastcomtec.com/fileadmin/ft ... /csp1x.pdf
http://www.ptcusa.com/files/manual/CR10_UM_180312.pdf
by Dan Knapp
Thu Feb 14, 2019 2:52 am
Forum: New User Chat Area
Topic: Some noob high voltage divider questions
Replies: 5
Views: 377

Re: Some noob high voltage divider questions

Use one of the Harbor Freight red freebie meters (input impedance 1 Meg.), and the bottom of your chain will be a net half Meg. Another use for the very handy red freebies! I just used one to build a ground loop detector (for circuit see https://authors.library.caltech.edu/8499/1/BELrsi07.pdf).
by Dan Knapp
Thu Jan 24, 2019 12:11 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: In-Vacuum Electrical Connectors
Replies: 4
Views: 1350

Re: In-Vacuum Electrical Connectors

Banana hardware is usually plated brass, which is not a good material to use in vacuum, especially if if gets hot. The other problem with banana connectors is that they are "spring" fit. The plugs will lose their "spring" when hot and the connection will fail. One can buy spring connectors from vacu...
by Dan Knapp
Wed Jan 23, 2019 4:50 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Institutional Quackery
Replies: 11
Views: 1282

Re: Institutional Quackery

Joe I would encourage you to write a letter to the editor listing your concerns with the paper. I think that would be a better forum than debating it here. In my experience, IEEE Transactions on Plasma Science has been a reputable source, but it appears in this case that they didn't demand adequate ...
by Dan Knapp
Wed Jan 23, 2019 12:29 am
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Institutional Quackery
Replies: 11
Views: 1282

Re: Institutional Quackery

This discussion prompted me to read the paper again. I also contacted the author to inform him that his paper was under discussion, and that he might want to weigh in to defend it. In his reply, he stated that he did actually build and test the device, but not at his present university. He said the ...
by Dan Knapp
Sun Jan 20, 2019 9:16 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Institutional Quackery
Replies: 11
Views: 1282

Re: Institutional Quackery

I read this paper several years ago and noticed things that suggest this is a proposed fusion reactor and the data shown are only calculated simulations. I think the author failed to clearly point out that he hadn't actually built the reactor and demonstrated its function. Some flags are: 1. It is a...