title: A continuous dry 300 mK cooler for THz sensing applications.
abstract: We describe and demonstrate the automated operation of a novel cryostat design that is capable of maintaining an unloaded base temperature of less than 300 mK continuously, without the need to recycle the gases within the final cold head, as is the case for conventional single shot sorption pumped (3)He cooling systems. This closed dry system uses only 5 l of (3)He gas, making this an economical alternative to traditional systems where a long hold time is required. During testing, a temperature of 365 mK was maintained with a constant 20 μW load, simulating the cooling requirement of a far infrared camera.
authors.affiliation: School of Physics and Astronomy, Cardiff University, Queen's Buildings, The Parade, Cardiff CF24 3AA, United Kingdom.
authors.forename: G M
authors.initials: GM
authors.lastname: Klemencic
authors.affiliation: School of Physics and Astronomy, Cardiff University, Queen's Buildings, The Parade, Cardiff CF24 3AA, United Kingdom.
authors.forename: P A R
authors.initials: PA
authors.lastname: Ade
authors.affiliation: Chase Research Cryogenics Ltd., Uplands, 140 Manchester Road, Sheffield S10 5DL, United Kingdom.
authors.forename: S
authors.initials: S
authors.lastname: Chase
authors.affiliation: School of Physics and Astronomy, Cardiff University, Queen's Buildings, The Parade, Cardiff CF24 3AA, United Kingdom.
authors.forename: R
authors.initials: R
authors.lastname: Sudiwala
authors.affiliation: QMC Instruments Ltd., School of Physics and Astronomy, Cardiff University, Queen's Buildings, The Parade, Cardiff CF24 3AA, United Kingdom.
authors.forename: A L
authors.initials: AL
authors.lastname: Woodcraft