Tokamak Definition and 39 Threads

Please be kind to help. How is an electric field formed due to toroidal magnetic field? How does the introduction of a poloidal magnetic field confine the plasma? Please answer in the context of Nuclear Fusion Reactor (tokamak).

It is long known that the toroidal field alone is not sufficient to achieve toroidal force balance within a tokamak due to the field being bent and geometry restricting the field to be of even strength both within the inner and outer circumference of the ring. Induced current is thus used for...

I really enjoy learning strange facts and while i would never assume to be a "Smart" person i do have the power to ask. So with a plasma fusion reactor like the tokamak or any other they have a viewing window to see the plasma bound in the toroidal magnetic field so what would happen if you...

Zpinch works by running a strong current through the plasma which sets up a field that tends to confine the plasma, so if the current is switched on rapidly the resulting temperature increase and B field increase tends to compress the plasma channel rapidly, at least this is how I understand the...

There are two questions that arose in my mind, first of all tokamaks use toroidal field coils which create a toroidal field within the torus to shape the plasma and confine it, but here is a question, the toroid coils have a static B field produced from a DC current in them, what kind of metal...

Summary: I'm interested in knowing more about instabilities within plasma. Is the viscosity of plasma produced by thermal, magnetic, or gravitational effects (or even something else)? I had the opportunity to talk with multiple Ph.D. students during the summer and was especially interested in...

https://arstechnica.com/science/2019/03/physicists-flip-the-d-in-tokamak-get-unexpectedly-good-result/ I wonder if it'll fit into a Tesla and then we can remake the Back to the Future with a Tesla movie.

A team of scientists from China's Institute of Plasma Physics announced this week that plasma in its Experimental Advanced Superconducting Tokamak (EAST) would be ready to begin attempting to generate more energy than it uses, in a world first. I am dubious about more news that comes out of...

I will make some assertions and then phrase a question , please correct me if necessary. So the tokamak works like a transformer where the primary is a coil winding while the secondary is a torus which contains plasma which being electrically conductive forms the secondary winding? The toroidal...

https://phys.org/news/2019-01-scientists-stabilizes-fusion-plasmas.html By applying more RF power to the unstable 'bubbles' that form in the plasmas.

The DTT project proposal talks about a D-D reaction inside the future tokamak that is going to be built in Italy, Frascati. Which is the reason of this choise? The cross section is smaller than the D-T reaction one, and neutrons are less energetic. How this influences heat and particle exhaust...

For a Year 12 Assignment I have to do a seminar on how magnetic fields are involved with a certain topic. I chose nuclear fusion energy production and specifically the tokamak. I understand that a toroidal magnetic field is created when a current is sent through a solenoid wrapped in a torus...

The title question is quite self-explanatory. Despite the fact that Spherical tokamaks are more spherical in shape, what else differentiates the ST from the conventional tokamak. I've heard that ST's use reverse field configurations from a website but I am skeptical about this since the rest...

I have the fundamental understanding of how tokamaks work. Now, why is it not ideal to confine plasmas using a z- or theta- pinch configurations?

http://www.pppl.gov/news/2016/09/pppl-director-stewart-prager-steps-down It appears that Stuart Prager is “stepping down” as director of PPPL. I wish him well. But in the announcement it refers to a “recent technical setback in the NSTX-U facility”. I had not heard previously of this set...

I was wondering if it is possible to setup a Tokamak like chamber with some sort of varying magnetic field arrangement around it, that can accelerate deuterons or other light nuclei, as if those nuclei were 'pulled' by a constant electric field of between 1kV and 100 kV (n.b. this should not...

In a tokamak design what accelerates the plasma? Is it the current from the primary coils driving the plasma round?

I am trying to figure out the flux surface average of a 3D perturbation in a tokamak. For example what is the flux surface average of cos(m*theta+n*phi) at a given flux surface. (Theta and phi being poloidal and toroidal angles respectively?

if you can get nuclear fusion in a stellarator vs tokamak how does that heat energy use to drive energy? also is it d-t from lithium for stellarator vs tokamak or something else?

I've been reading some about the ITER project, tokamaks, and other approaches to plasma containment. Why can't ion trapping approaches such as an orbitrap be used for fusion plasma containment?

So as we all know (or at least I assume) Global Warming is real and happening, I am a teen, 17, and not trying to get answers for homework or anything like that. I just want to know, is it possible to create fusion using the temperature found at active Geo-thermal sites to reach the temp...

HI, Some things I want to confirm, somethings I need to be reminded of: So what I remember is that Magnetostatics - stationary charges Electrostatics - constant or slow moving charges And that an accelerating charge makes a magnetic field, but you need a time varying field to move charges. So...

Would it be possible to just get a swirling plasma in an acrylic tube kind of like the arc reactor in iron man? I'm not talking about anything close to the temperatures or pressures required for fusion just kind of a demo piece to show the general idea.

Hi! I wish to know how to design a Tokamak of my own. This Tokamak will of course be very tiny but my intention is to ignite ordinary air and control the plasma's poloidal diameter by poloidal coils placed along the torous. I wish to do two things with my Tokamak: 1) Ignite ordinary air of...

How look field lines in TOKAMAK? Do you have any picture? How I could physically make for a better understanding? (of paper, laser, ...)

Hi, Is it possible to use a ferrofluid to create a tokamak/spheromak? If not, then why? http://en.wikipedia.org/wiki/Ferrofluid Ferrofluids can be composed of non-magnetic liquids containing magnetic particles in colloidal suspension.

Hi, I've got conflicting impressions on the motion of particles in tokamak reactors. Wikipedia says that they generally follow the poloidal field lines due to the Lorentz force, whilst another site claimed that the promising results were due to the random motion of the particles within the...

Q.) What would happen if a *reverse-Tokamak* was created, thus reversing the electromagnets to a negative charge and repelling electrons into each other instead of fusing hydrogen nuclei, what approximate temperature would need to be used and would it work? If so what would occur?

Hello all, I am a layman who is interested in nuclear fusion via magnetic confinement (the Tokamak setup). I recently read in a book about how the (a) transformer in the device could operate only for some number of "volt-seconds" before it had to be "recharged". This requires an additional...

Assuming the ITER is a success, what would it take to be able to miniaturize it into something a little more portable?

Mainly I don't get how plasma loses energy by conduction, which is what I have read. Is it just from the collisions between plasma particles and the wall? Thanks!

Hi, I need to learn about nuclear fusion and how the Tokamak works. Can anyone recommend any books/texts/websites that would be useful? I am a 3rd year Physics undergrad and have done a reasonable amount of EM, to give you an idea of the level - I don't want a layman explanation but also not...

As I understand it, the magnetic field confines the electrons because of the repulsion of the electrons in the plasma and the electrons traveling in the magnetic current. My question is what keeps the protons and neutrons released in the plasma from passing through the magnetic field in a...

What are the minimum standards for tokamak fusion? For instance, What are the ideal materials? Should you use deuterium, tritium, or a mixture of the two? How much current do you run through it before it confines the hydrogen gas enough to create fusion? Please answer.

What is the smallest size for a tokamak reactor? I was wondering if it was possible to create it in a garage or basement like a fusor.

why do they use such a huge machine like the tokamak to try and sustain fusion? wouldn't it be easier to build a really small one? I'm guessing it would be a lot easier to recreate the conditions of the sun's core (extreme temp./pressure), assuming that's the blueprint for fusion, in a small...

I have tryed to look into ITER and tokamak reactors latest updated information online, and cannot find any real specifics on it's latest progress. Does anyone know of where we are with producing sustained fusion for energy purposes, through currently using the tokamak? Is it possible to...

I recently read from newspapers that china has built a experimental advanced superconductive TOKAMAK , and such an experiment is going to set about. It also mentioned if the experiment exceeded, China would be the first country on the planet owing such a experimental equipment.I just roughly...

could the use of buckminsterfullerene or bucky balls be a more practical material to use in tokamak because of the less friction it would create on the plasma?