3 ms·

Anyone know why you can't just build a really long solenoid?

• wtallis 10y ago
  That would allow you to keep a quantity of plasma confined for a longer period of time than a short solenoid, but doesn't help you keep the plasma density/pressure up high enough for sustained fusion.
• Ygg2 10y ago
  Simple. A solenoid isn't closed surface. It can't even hold plasma together.