H ELECTRICITY
H05 ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
H05H PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
H05H1/00 Generating plasma; Handling plasma
H05H1/0006 Investigating plasma, e.g. measuring the degree of ionisation or the electron temperature