Patent ID: 9578729
Date: 2017-02-21
CPC Classifications: H05G

Claim:
1. An extreme ultraviolet light source comprising: a chamber; a source of droplet targets; one or more lasers focused onto the droplets in an interaction region; a flowing buffer gas; one or more reflective collector elements to redirect extreme ultraviolet light to a point on the collector optical axis which is an exit port of the chamber; a pair of similar polarity field coils that generate a parallel magnetic field through the interaction region with magnetic symmetry axis perpendicular to the optical axis; a pair of opposed field coils outside of the first pair that generate cusps with magnetic null points on the magnetic axis; a pair of cylindrical beam dumps coaxial with the magnetic axis that intercept the radial outflow from the cusps, wherein waste heat and exhaust particles are able to escape from magnetic confinement at the cusp waists and are intercepted by the beam dumps.