Analysis techniques and performance of the Domino Ring Sampler version 4 based readout for the MAGIC telescopes

• We perform studies of the DRS4 based readout of the MAGIC telescopes
• Advanced pedestal subtraction procedure results in a stable baseline.
• The noise of the system is below one photoelectron.
• The calibration of the DRS4 time response gives time resolution of 0.2 ns.
• Linearity is very good up to saturation at 750 phe.

Recently the readout of the MAGIC telescopes has been upgraded to a new system based on the Domino Ring Sampler version 4 chip. We present the analysis techniques and the signal extraction performance studies of this system. We study the behavior of the baseline, the noise, the cross-talk, the linearity and the time resolution. We investigate also the optimal signal extraction. In addition we show some of the analysis techniques specific to the readout based on the Domino Ring Sampler version 2 chip, previously used in the MAGIC II telescope.