Patent ID: 9578731
Date: 2017-02-21
CPC Classifications: H01J,H05H

Claim:
1. A power generation system configured for identifying characteristics of a plasma load, the power generation system comprising: a power source configured to apply a primary power signal at a primary frequency to an output, the output configured for coupling to a plasma load, either directly or through a matching network, the power source concurrently applying one or more secondary power signals at one or more secondary frequencies to the output wherein power produced at the secondary frequencies is lower than power produced at the primary frequency, and wherein the power source is configured to combine the primary power signal and the one or more secondary power signals to provide a combined signal to the output before the combined signal is applied to the plasma load; a sensor arranged to monitor a characteristic of the power delivered to the plasma load; at least one circuit in communication with the sensor, the at least one circuit implementing; an identification module that analyzes the monitored characteristic to extract characteristics of the plasma load.