Method For Regulating Energy Input of a Pulsed Arc Plasma During a Joining Process and Apparatus

An apparatus for regulating an energy input of a pulsed arc plasma during a joining process, in particular in a welding or soldering process, comprising:

• a measurement device that is configured to detect first measurement signals for a first temporal response of emission light from an arc plasma of the joining process in a first spectral range with a first photodiode having a sensitivity maximum at a first wavelength, and to detect second measurement signals for a second temporal response of emission light from an arc plasma of the joining process in a second spectral range, which is at least partially different from the first spectral range, with a second photodiode having a sensitivity maximum at a second wavelength, which is different from the first wavelength;
• and
• an analysis device, which is configured to generate control signals by comparing the first measurement signals and the second measurement signals, and to provide the control signals for regulating an energy source for pulsed energy for the arc plasma.