Search found 6110 matches

by Skipjack
Thu Nov 26, 2020 5:21 pm
Forum: News
Topic: Creating a magnetic field at a distance
Replies: 8
Views: 165

Re: Creating a magnetic field at a distance

Hmm, interesting.
Could have application in some fusion reactor designs. Question is how efficient those magnets can be.
by Skipjack
Wed Nov 25, 2020 6:04 am
Forum: News
Topic: Creating a magnetic field at a distance
Replies: 8
Views: 165

Re: Creating a magnetic field at a distance

LOL, it is livescience...
The science in the name has nothing to do with the idiotically shitty content on the website. I got banned from their comment sections because I kept pointing out their BS. I am not even going to bother reading the article.
by Skipjack
Sun Nov 15, 2020 7:14 pm
Forum: General
Topic: I Have Been Occupied
Replies: 6
Views: 1816

Re: I Have Been Occupied

Glad you are doing well bud! A heart attack is nothing to sneeze at! I did not know you had one. Glad you are OK. Please be careful and take care of your health!
by Skipjack
Tue Nov 10, 2020 3:48 pm
Forum: News
Topic: Z-Pinch Renaissance
Replies: 170
Views: 105891

Re: Z-Pinch Renaissance

This one will be interesting: https://meetings.aps.org/Meeting/DPP20/Session/CP20.10 Deformation of Plasma-Facing Surfaces in the ZaP-HD Device: Target surfaces are analyzed with a scanning electron microscope and energy-dispersive x-ray spectroscopy. Stagnated plasma is found to limit the heat flux...
by Skipjack
Sat Oct 24, 2020 4:10 pm
Forum: News
Topic: Z-Pinch Renaissance
Replies: 170
Views: 105891

Re: Z-Pinch Renaissance

They might not be mentioning the issue anymore because it turned out to be a non issue. I mean, we will see what happens. From what we know, they are planning to achieve a notional Q~1 within the next 3 years (I read an earlier statement that said 2 years). Until then, we can only speculate. I prefe...
by Skipjack
Sat Oct 24, 2020 12:45 am
Forum: News
Topic: Z-Pinch Renaissance
Replies: 170
Views: 105891

Re: Z-Pinch Renaissance

Giorgio, the paper you quoted is from 2006. Since then Uri and his team have made a lot of progress and so far the scaling laws are holding, suggesting that thermalization is not a real issue. Back in 2006, they did not even have ZAP-HD yet which scaled the input current to 50 kA and since then thei...
by Skipjack
Thu Oct 22, 2020 1:47 am
Forum: News
Topic: Z-Pinch Renaissance
Replies: 170
Views: 105891

Re: Z-Pinch Renaissance

I think those are already included in the design of the ZAP, but you still need to charge them from a source before the reactor first shot and also in any event when there is not enough energy charge to allow for another shot. I disagree with that. Energy needs anyhow to be extracted from the charg...
by Skipjack
Wed Oct 21, 2020 8:19 am
Forum: News
Topic: Z-Pinch Renaissance
Replies: 170
Views: 105891

Re: Z-Pinch Renaissance

First, the reason why I added a fission reactor is that you need anyhow enough electrical power to "start" the first fusion reaction, so you need anyhow a secondary continuous and reliable electrical source whenever you need to start the reactor. Capacitor bank. Second, the fusion energy gain limit...
by Skipjack
Tue Oct 20, 2020 2:47 am
Forum: News
Topic: Z-Pinch Renaissance
Replies: 170
Views: 105891

Re: Z-Pinch Renaissance

At the current distance to Saturn I am roughly estimating about maybe 300 days total trip time for a 660 take off mass ship (30 tonne dry and 630 tonne fuel). With only 30 tons of dry mass you can't fit a reactor able to give you 300 KN thrust at 5,000 ISP. Than all the assumptions and calculations...
by Skipjack
Mon Oct 19, 2020 11:45 pm
Forum: News
Topic: Z-Pinch Renaissance
Replies: 170
Views: 105891

Re: Z-Pinch Renaissance

Assuming a straight line for now. It is easier.
Maybe I miscalculated something somewhere?
by Skipjack
Mon Oct 19, 2020 8:16 pm
Forum: News
Topic: Z-Pinch Renaissance
Replies: 170
Views: 105891

Re: Z-Pinch Renaissance

Ok, why such a huge ship? 30,000 tonnes is quite big, IMHO, especially when using only one engine (engine mass is not really that relevant). At the current distance to Saturn I am roughly estimating about maybe 300 days total trip time for a 660 take off mass ship (30 tonne dry and 630 tonne fuel). ...
by Skipjack
Mon Oct 19, 2020 5:21 pm
Forum: News
Topic: Z-Pinch Renaissance
Replies: 170
Views: 105891

Re: Z-Pinch Renaissance

What is the destination?
by Skipjack
Sun Oct 18, 2020 1:34 pm
Forum: News
Topic: Z-Pinch Renaissance
Replies: 170
Views: 105891

Re: Z-Pinch Renaissance

Yes, I already put that into account. With our actual level of technology an high ISP/high thrust engine design has the trade-off of a huge increase in mass (for energy generation/ancillary equipment) that will generally nullify the extra ISP (or the extra thrust) benefit. Any engine proposed so fa...
by Skipjack
Fri Oct 16, 2020 2:37 pm
Forum: News
Topic: Z-Pinch Renaissance
Replies: 170
Views: 105891

Re: Z-Pinch Renaissance

That is what Helion is planning to do. Their reactor will be a little above break even with pure D+D but the real oomph comes when they feed the He3 back into the reactor for the next shot. Then they (at least hope to) get a Q above 5, which will be enough for their reactor design to be economically...
by Skipjack
Fri Oct 16, 2020 9:09 am
Forum: News
Topic: Z-Pinch Renaissance
Replies: 170
Views: 105891

Re: Z-Pinch Renaissance

But what is the cost of producing Tritium? I am assuming if you can sell it for such an exorbitant amount it must be expensive to make. De and Lithium are cheap but that doesn't mean the products are cheap. For instance graphite is cheap; doesn't mean that carbon fiber (or diamonds) made from such ...