5 ms·

the first video claims a magnetic field strength of 2.5 Tesla(o) roughly that of an MRI(i) can anyone speak to sort of considerations that lead to this value?

the first video claims a magnetic field strength of 2.5 Tesla(o) roughly that of an MRI(i) can anyone speak to sort of considerations that lead to this value? 2.5T seems insignificant considering the events it will be confining how sensitive is the field to magnetic interactions outside of the device? (o) https://youtu.be/lyqt6u5_sHA?t=301 https://youtu.be/lyqt6u5_sHA?t=301 (i) https://en.wikipedia.org/wiki/Tesla_(unit)#Examples https://en.wikipedia.org/wiki/Tesla_(unit)#Examples

madaxe_again 11y ago
That's part of the beauty of the stellarator design - you need a comparatively weak (2.5T is still an unholy field) field to maintain containment.
jessriedel 11y ago
Steady magnets can't get much stronger than that. The very strongest steady magnets, purpose built, are in the 40-70 tesla range. I believe the limit is set by the break down of normal matter. Higher field strengths can be achieved, but only for fractions of a second and are general destructive.
- madaxe_again 11y ago
  Imploding coils. This stuff gets me every time I see it - chills down the spine. You can induce a field in the MEGAtesla range for an infintesimal amount of time. Take a copper (or superconductor, if you're feeling ballsy) coil, run a huge current through it from your enormous capacitor bank, set off a wad of high explosive surrounding the apparatus - the near-instantaneous collapse of the conductor causes the field within to become absolutely enormous - and equally importantly the Ts-1 - i.e. the rate of change of the field - again, you can induce enormous currents outside of the apparatus through induction. This technique is mostly used in solid state and, surprise surprise, fusion experiments. Oh, and you can make an EM bomb if you make a big enough one, and wipe out a city's electronic infrastructure in a microsecond. https://en.wikipedia.org/wiki/Explosively_pumped_flux_compression_generator https://en.wikipedia.org/wiki/Explosively_pumped_flux_compre...
ihsw 11y ago
Probably for each magnet, of which there are fifty. And considering these devices are heavily shielded, I would doubt there would be much interaction outside.

madaxe_again 11y ago

That's part of the beauty of the stellarator design - you need a comparatively weak (2.5T is still an unholy field) field to maintain containment.

jessriedel 11y ago

Steady magnets can't get much stronger than that. The very strongest steady magnets, purpose built, are in the 40-70 tesla range. I believe the limit is set by the break down of normal matter. Higher field strengths can be achieved, but only for fractions of a second and are general destructive.

madaxe_again 11y ago
Imploding coils. This stuff gets me every time I see it - chills down the spine. You can induce a field in the MEGAtesla range for an infintesimal amount of time. Take a copper (or superconductor, if you're feeling ballsy) coil, run a huge current through it from your enormous capacitor bank, set off a wad of high explosive surrounding the apparatus - the near-instantaneous collapse of the conductor causes the field within to become absolutely enormous - and equally importantly the Ts-1 - i.e. the rate of change of the field - again, you can induce enormous currents outside of the apparatus through induction. This technique is mostly used in solid state and, surprise surprise, fusion experiments. Oh, and you can make an EM bomb if you make a big enough one, and wipe out a city's electronic infrastructure in a microsecond. https://en.wikipedia.org/wiki/Explosively_pumped_flux_compression_generator https://en.wikipedia.org/wiki/Explosively_pumped_flux_compre...

ihsw 11y ago

Probably for each magnet, of which there are fifty. And considering these devices are heavily shielded, I would doubt there would be much interaction outside.