18.6Â K single-stage high frequency multi-bypass coaxial pulse tube cryocooler

► A single-stage high frequency multi-bypass coaxial pulse tube cryocooler has been developed for physic experiments. ► A lowest cooling temperature of 18.6 K is achieved. ► The cooler typically provides 0.2 W/20.6 K and 0.5 W/24.1 K with the input power of 260 W at 300 K ambient temperature. ► The temperature stability of the developed PTC is observed.