Rf-Powered Sampling Electrode
Original Publication Date: 1987-Apr-01
Included in the Prior Art Database: 2005-Feb-01
Disclosed is an RF-powered plasma electrode which is designed to (1) monitor the reaction products of the plasma-sample in situ and (2) heat or cool the sample simultaneously with such monitoring. As shown in the drawings, this is implemented by embedding heater elements including heater wires 10 and a heater plate 12, a thermocouple (not shown) and cooler elements including a water-in tube 14 and a water-out tube 16. Furthermore, gas-sampling grooves 18 are formed beneath the sample and extending outside the periphery of the sample which allow the reaction products to be monitored through a gas sampling tube 20 connected to a mass spectrometer 22 at one end and the gas-sampling grooves 18 at the other end.