MIT's simple ARC reactor for nuclear fusion power plants

in environment on (#WCZ9)
story imageAdvances in magnet technology have enabled researchers at MIT to propose a new design for a practical compact tokamak fusion reactor. MIT's new reactor is named as the ARC reactor.

Rare-earth barium copper oxide (REBCO) superconducting tapes are the enabling technology behind the ARC reactor. When it is cooled to liquid nitrogen temperature, the superconducting tape can carry as much current as the large copper conductor, enabling the construction of extremely high"field magnets, which consume minimal amounts of power.

No evidence that it does shit to address the real problem (Score: 1)

by on 2015-12-08 13:48 (#X1C6)

As far as I know, the reason Tokamaks have consistently failed for over 50 years has nothing to do with them being too large and expensive. Dozens of them have been tried, many very extensively. In all cases, nobody has figured out how to solve the exceedingly difficult problem of maintaining stable confinement for more than milliseconds. Confinement takes more than just a simple toroidal magnetic field.

There are other problems, huge ones, but until some progress is made on this overriding one, we are just stumbling helplessly in the dark.

I assume that many if not all Tokamaks have used superconducting magnets. You don't run currents of millions of amperes through copper. Not for long (more than milliseconds). Even if you had enough copper to carry it and enough refrigeration to keep the copper from melting, losses would be collossal.
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Knee, head, nose, fruit and hair: how many body parts in the list?