General Fusion plans to use an imploding shockwave of molten lead to compress a magnetized plasma "spheromak" target in order to make it burn more efficiently.
How come the lead does not quench the plasma (it better not, otherwise thats 50 million down the drain)? Does the lead compress the plasma via confining the plasma's magnetic field (something that a non-metal liquid would not be able to do), while avoiding direct contact? If not, and mechanical contact is necessary, how come it doesn't immediately rob heat away from the minuscule amount of plasma?
A related question, which is not about the liquid-plasma interaction but instead concerns the liquid flow: