Oxford Instruments Kelvinox MX400
Antti Nuottajärvi
nuanka@jyu.fi +358 50 3956002
2004
2004
Dilution refrigerator with a 8 T superconducting magnet
Low noise measurements at low temperatures
The whole system is located on a separate concrete block mechanically decoupled from the building. Additionally, the cryostat is suspended on anti-vibration supports with the cut frequency 7 Hz.
The refrigerator is installed in an E/M shielded room. Only battery-powered analogue front-end electronics is located inside the shielded room. All input/output in/from the shielded room are RF filtered.
The custom tailored ultra-low-T insert enables simultaneous mounting of 3 chips (max 12 mm x 12 mm) with 8 contacts each, plus 8 extra lines for auxiliary measurements (e.g. thermometry).
The insert is optimized for measuring V(I,T,B) characteristics of nanosize systems with extremely high level of noise reduction: in addition to the shielded room filters - 4 stages of RF noise suppression.
Fully automatic gas handling system (Kelvinox IGH)
Base temperature 8.5mK
Cooling power > 400 uW @ 100 mK
Magnetic field up to 8 T
Max sample size 90 mm (zero magnetic field) and 26 mm (in magnetic field)