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## Homework Statement

Consider a positive point charge +q, immersed in plasma. Show that the net charge in the Debye shielding cloud exactly cancels the test charge. Assume the ions are fixed and that e*phi <<< kTe.

## Homework Equations

f(u) = A exp [-(1/2*m*u^2 + q*phi)/k_b*T_e]

u is the x component of velocity

## The Attempt at a Solution

Really lost on this one. I think I could make a hand waivey argument with Gauss's Law but I don't see where to go on this one.