Question R11 Q14 - MIT Science Bowl Invitational 2020

Researchers in the Plasma Science and Fusion Center at MIT have recently recieved renewed funding for stellarator fusion experiments in Germany at the Max Planck Institute of Plasma Physics. Which of the following choices provides accurate reasoning for why stellarators may sometimes prove to be more useful than tokamaks in fusion experiments?

W) Stellarators do not require a current to be driven through the plasma itself to generate the magnetic field containing the plasma

X) More particles in tokamaks are in unconfined orbits than in stellarators, and thus overall lose more energy to diffusion

Y) The effective plasma volume in stellarators is much larger than those of tokamaks, on average

Z) Stellarators in the trapped-electron mode routinely results in inwards transport flux, while it is stabilized for tokamaks

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