Speaker
Mr
Neil Clarke
(Oxford Instruments Nanoscience)
Description
Sorption pumped 3He refrigerator systems are a well described method of accessing the ~ 300mK temperature range. However, pulse-tube pre-cooled 3He systems typically also include a pumped 4He refrigerator stage to ensure the efficient condensation of the 3He charge, and a set of heat switches to isolate the sorption pumps during regeneration. Here we show that excellent cryogenic performance of a 3He refrigerator (base temperature below 250mK and 100µW cooling capacity below 330mK) can be achieved without the added complication of these heat switches.
Primary authors
Dr
Antony Matthews
(Oxford Instruments Nanoscience)
Mr
Tom Marsh
(Oxford Instruments Nanoscience)
Dr
Harriet van der Vliet
(Oxford Instruments Nanoscience)
Mr
Neil Clarke
(Oxford Instruments Nanoscience)
