Re: Heating for fusion, Why toast plasma when you can microwave it?

Aug 08, 2024 Last reply: 1 year ago 9 Replies


Heating for fusion: Why toast plasma when you can microwave it!


>
formatting link
Carving a new path forward for compact fusion vessels
> Date:
> August 6, 2024
> Source:
> DOE/Princeton Plasma Physics Laboratory
> Summary:
> Can plasma be sufficiently heated inside a tokamak using only microwaves?
> New research suggests it can! Eliminating the central ohmic heating coil
> normally used in tokamaks will free up much-needed space for a more compact,
> efficient spherical tokamak.

Not so much carving a new path as looking for one. Maybe be gyrotrons can heat the plasma enough, but planing to do experiment which can test whether they can isn't exactly carving a new path - more just looking at a possible new path.


Bye bye ITER and that otehr fusion attempt mayonaise thing
>
formatting link
Researchers dig deeper into stability challenges of nuclear fusion -- with mayonnaise
>
> Now all I am waiting for is a 10 year old kid doing a better than break even fusion experiment in its parents kitchen...

You may have to wait a long time. Mayonaise may exhibit Rayleigh-Taylor instability, but the lessons it might be able to impart would be difficult to translate into totomak design.

Of course you do. You are too dim to notice that it can't generate enough energy to be a useful energy source - though it can be a handy source of neutrons if you need them.

This spelled out if the link you posted, but clearly didn't read.

But none are going to make it an energy source.

The objections to the Farnsworth fusor as a power source are rather more fundamental. Birds fly, and they are heavier than air.

You've also be posting about the Le age theory of gravity. I'm well aware that you have moronic obsessions, and can't learn how silly they are.

The laser driven fusion machine at the NIF has produced energy, if nowhere near enough to be useful.

It's main job was always testing nuclear weapons in a way that didn't dump radioactive isotopes into the atmosphere, but you are too dumb to have processed that information.

"Same"?

Comets are fluffy snowballs that out-gas when their elliptical orbits get close to the sun, so that we can see them in the night sky.

Meteors are lumps of rock that we notice when they actually hit the earth. Big ones, like the asteroid that killed off the dinosaurs, put enough dust into the upper atmosphere to cause some global cooling until the dust washes out.

Calenders are all about repetitive stuff in the sky. and repeating meteor streams don't dump enough mass to change the climate.

About a year ago. An electronic alarm clock stopped working, because one of the leads had fallen off. I tried to solder it back on, but the wire was too fine to let me do it. I do have some heavier insulated multi-strand hook-up wire somewhere around the flat, but I haven't been able to find it yet, and I've got two other alarms clocks that still work, so I haven't looked that hard.

NIF is really about nuclear weapons, but the over-unity energy yield is interesting.

Good question!

It serves to give the physicists involved something they can publish in the peer-reviewed literature, but it is a long way from any kind of practical application.

https://hb11.energy is more promising, not least because hydrogen-boron fusion doesn't generate neutrons which mess up the hardware that create the conditions for fusion.

Not really. It speaks to the point that I'm not much involved in practical electronics at the moment, though I do persist in applying for the occasional job. John Larkin can't be bothered to put in the parallel capacitance of his simulated inductors in his LTSpice simulations, but still thinks that he is doing practical electronics.

We're up in the mountains, in Truckee, and I'm not soldering here either. It's hit 92F during the day but it's cold at night. Well, 92 above an asphalt road; it's cooler in the woods. It's dry so doesn't feel very hot. We get occasional wafts of smoke, from the usual California forest fires. We had a bear stroll down the street yesterday.

I have a new intern starting soon, and there's so much to teach him, including soldering.

Yes. He was a mostly unlearned farm boy who invented electronic television near here, on Green Street.

formatting link
It's not hard to build a particle accelerator to get some fusion, but it's not efficient.

If there wasn't you wouldn't have hired him.

<snip>

But why do you think that?

The tiny particles of oxygen that burn the almost as small hydrocarbon molecules in cars call for tolerably bulky power units. Your logic sucks.

We now have fibre-optic cables rather than telegraph lines. We don't route much data up to synchronous satellites any more - it's too slow and you can't parallel up enough connections.

And so is Jan Panteltje's brain, even it contains 86 billion very small neurones, some of which work.

Fission works fine, even better if we'd recycle used fuel.

Natural gas is great too. We don't really have an energy problem.

But there is the problem that the fission products include stuff that stays radioactive for more than 100,000 years. We've been generating them for more than 70 years now, and have yet to set up any kind of long term repository. There are theoretically acceptable solutions, but the neighbourhoods that get asked accommodate them don't find them acceptable in practice.

And the energy produced isn't as cheap the energy you get from renewable sources

Until you realise that anthropogenic global warming is a real problem, despite the lying propaganda churned out by the fossil carbon extraction industry. It is aimed at gullible twits, and we do have some of them posting here.

And burning natural gas doesn't produce energy as cheaply as you can get from renewable sources either.

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required