An impulse-capacitor is a unit that doesn't apply its impulse at the exact moment that its received, but instead has some ability to "store" the impulse. It's a physics bug. By storing up the impulse it can stay close to the Newtons while they can push a tremendous amount of force into the unit, and then that massive amount of force is released all at once, allowing the unit to go
really high on only a few Newtons.
This is far more than would've normally been applied if the impulse had been actualized immediately, since the unit would've been pushed out of the Newton's range.