Active suppression of temperature oscillation from a pulse-tube cryocooler in a cryogen-free cryostat: Part 2. Experimental realization

•Active suppression of temperature oscillations has been implemented experimentally.•The influence factors for this method have been studied.•This method can reduce temperature oscillation by a further 30% compared with PI feedback.•It is a universal auxiliary tool to improve the temperature stability in all cryogen-free cryostats.